mcs/class/System.Data/System.Data.Common/DbDataAdapter.cs

   1 //
   2 // System.Data.Common.DbDataAdapter.cs
   3 //
   4 // Author:
   5 //   Rodrigo Moya (rodrigo@ximian.com)
   6 //   Tim Coleman (tim@timcoleman.com)
   7 //   Sureshkumar T <tsureshkumar@novell.com>
   8 //
   9 // (C) Ximian, Inc
  10 // Copyright (C) Tim Coleman, 2002-2003
  11 //
  12
  13 //
  14 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  15 //
  16 // Permission is hereby granted, free of charge, to any person obtaining
  17 // a copy of this software and associated documentation files (the
  18 // "Software"), to deal in the Software without restriction, including
  19 // without limitation the rights to use, copy, modify, merge, publish,
  20 // distribute, sublicense, and/or sell copies of the Software, and to
  21 // permit persons to whom the Software is furnished to do so, subject to
  22 // the following conditions:
  23 //
  24 // The above copyright notice and this permission notice shall be
  25 // included in all copies or substantial portions of the Software.
  26 //
  27 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  28 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  29 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  30 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  31 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  32 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  33 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  34 //
  35
  36 using System;
  37 using System.Collections;
  38 using System.ComponentModel;
  39 using System.Data;
  40 using System.Runtime.InteropServices;
  41
  42 namespace System.Data.Common {
  43 #if NET_2_0
  44         public abstract class DbDataAdapter : DataAdapter, IDbDataAdapter, IDataAdapter, ICloneable
  45 #else
  46         public abstract class DbDataAdapter : DataAdapter, ICloneable
  47 #endif
  48         {
  49                 #region Fields
  50
  51                 public const string DefaultSourceTableName = "Table";
  52                 const string DefaultSourceColumnName = "Column";
  53
  54                 #endregion // Fields
  55
  56                 #region Constructors
  57
  58                 protected DbDataAdapter()
  59                 {
  60                 }
  61
  62                 [MonoTODO]
  63                 protected DbDataAdapter(DbDataAdapter adapter) : base(adapter)
  64                 {
  65                 }
  66
  67                 #endregion // Fields
  68
  69                 #region Properties
  70
  71 #if NET_2_0
  72                 protected internal CommandBehavior FillCommandBehavior {
  73                         get { throw new NotImplementedException (); }
  74                         set { throw new NotImplementedException (); }
  75                 }
  76 #endif
  77
  78
  79 #if NET_2_0
  80                 [MonoTODO]
  81                 IDbCommand IDbDataAdapter.SelectCommand {
  82                         get { return ((IDbDataAdapter) this).SelectCommand; }
  83                         set { throw new NotImplementedException(); }
  84                 }
  85
  86                 [MonoTODO]
  87                 IDbCommand IDbDataAdapter.UpdateCommand{
  88                         get { return ((IDbDataAdapter) this).UpdateCommand; }
  89                         set { throw new NotImplementedException(); }
  90                 }
  91
  92                 [MonoTODO]
  93                 IDbCommand IDbDataAdapter.DeleteCommand{
  94                         get { return ((IDbDataAdapter) this).DeleteCommand; }
  95                         set { throw new NotImplementedException(); }
  96                 }
  97
  98                 [MonoTODO]
  99                 IDbCommand IDbDataAdapter.InsertCommand{
 100                         get { return ((IDbDataAdapter) this).InsertCommand; }
 101                         set { throw new NotImplementedException(); }
 102                 }
 103
 104                 [MonoTODO]
 105                 [Browsable (false)]
 106                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 107                 public DbCommand SelectCommand {
 108                         get { return (DbCommand) ((IDbDataAdapter) this).SelectCommand; }
 109                         set { throw new NotImplementedException(); }
 110                 }
 111
 112                 [MonoTODO]
 113                 [Browsable (false)]
 114                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 115                 public DbCommand DeleteCommand {
 116                         get { return (DbCommand) ((IDbDataAdapter) this).DeleteCommand; }
 117                         set { throw new NotImplementedException(); }
 118                 }
 119
 120                 [MonoTODO]
 121                 [Browsable (false)]
 122                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 123                 public DbCommand InsertCommand {
 124                         get { return (DbCommand) ((IDbDataAdapter) this).InsertCommand; }
 125                         set { throw new NotImplementedException(); }
 126                 }
 127
 128                 [MonoTODO]
 129                 [Browsable (false)]
 130                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 131                 public DbCommand UpdateCommand {
 132                         get { return (DbCommand) ((IDbDataAdapter) this).UpdateCommand; }
 133                         set { throw new NotImplementedException(); }
 134                 }
 135
 136                 [MonoTODO]
 137                 [DefaultValue (1)]
 138                 public int UpdateBatchSize {
 139                         get { throw new NotImplementedException (); }
 140                         set { throw new NotImplementedException (); }
 141                 }
 142 #else
 143                 IDbCommand SelectCommand {
 144                         get { return ((IDbDataAdapter) this).SelectCommand; }
 145                 }
 146
 147                 IDbCommand UpdateCommand {
 148                         get { return ((IDbDataAdapter) this).UpdateCommand; }
 149                 }
 150
 151                 IDbCommand DeleteCommand {
 152                         get { return ((IDbDataAdapter) this).DeleteCommand; }
 153                 }
 154
 155                 IDbCommand InsertCommand {
 156                         get { return ((IDbDataAdapter) this).InsertCommand; }
 157                 }
 158 #endif
 159
 160                 #endregion // Properties
 161
 162                 #region Events
 163
 164 #if ONLY_1_0 || ONLY_1_1
 165
 166                 [DataCategory ("Fill")]
 167                 [DataSysDescription ("Event triggered when a recoverable error occurs during Fill.")]
 168                 public event FillErrorEventHandler FillError;
 169
 170 #endif
 171                 #endregion // Events
 172
 173                 #region Methods
 174
 175 #if NET_2_0
 176                 protected virtual RowUpdatedEventArgs CreateRowUpdatedEvent (DataRow dataRow, IDbCommand command,
 177                                                                              StatementType statementType,
 178                                                                              DataTableMapping tableMapping)
 179                 {
 180                         return new RowUpdatedEventArgs (dataRow, command, statementType, tableMapping);
 181                 }
 182
 183                 protected virtual RowUpdatingEventArgs CreateRowUpdatingEvent (DataRow dataRow, IDbCommand command,
 184                                                                                StatementType statementType,
 185                                                                                DataTableMapping tableMapping)
 186                 {
 187                         return new RowUpdatingEventArgs (dataRow, command, statementType, tableMapping);
 188                 }
 189
 190                 [MonoTODO]
 191                 protected virtual void OnRowUpdated (RowUpdatedEventArgs value)
 192                 {
 193                 }
 194
 195                 [MonoTODO]
 196                 protected virtual void OnRowUpdating (RowUpdatingEventArgs value)
 197                 {
 198                 }
 199 #else
 200                 protected abstract RowUpdatedEventArgs CreateRowUpdatedEvent (DataRow dataRow, IDbCommand command,
 201                                                                               StatementType statementType,
 202                                                                               DataTableMapping tableMapping);
 203                 protected abstract RowUpdatingEventArgs CreateRowUpdatingEvent (DataRow dataRow, IDbCommand command,
 204                                                                                 StatementType statementType,
 205                                                                                 DataTableMapping tableMapping);
 206
 207                 protected abstract void OnRowUpdated (RowUpdatedEventArgs value);
 208                 protected abstract void OnRowUpdating (RowUpdatingEventArgs value);
 209 #endif
 210                 private FillErrorEventArgs CreateFillErrorEvent (DataTable dataTable, object[] values, Exception e)
 211                 {
 212                         FillErrorEventArgs args = new FillErrorEventArgs (dataTable, values);
 213                         args.Errors = e;
 214                         args.Continue = false;
 215                         return args;
 216                 }
 217
 218                 protected override void Dispose (bool disposing)
 219                 {
 220                         if (disposing) {
 221                                 IDbDataAdapter da = (IDbDataAdapter) this;
 222                                 if (da.SelectCommand != null) {
 223                                         da.SelectCommand.Dispose();
 224                                         da.SelectCommand = null;
 225                                 }
 226                                 if (da.InsertCommand != null) {
 227                                         da.InsertCommand.Dispose();
 228                                         da.InsertCommand = null;
 229                                 }
 230                                 if (da.UpdateCommand != null) {
 231                                         da.UpdateCommand.Dispose();
 232                                         da.UpdateCommand = null;
 233                                 }
 234                                 if (da.DeleteCommand != null) {
 235                                         da.DeleteCommand.Dispose();
 236                                         da.DeleteCommand = null;
 237                                 }
 238                         }
 239                 }
 240
 241                 public override int Fill (DataSet dataSet)
 242                 {
 243                         return Fill (dataSet, 0, 0, DefaultSourceTableName, ((IDbDataAdapter) this).SelectCommand, CommandBehavior.Default);
 244                 }
 245
 246                 public int Fill (DataTable dataTable)
 247                 {
 248                         if (dataTable == null)
 249                                 throw new ArgumentNullException ("DataTable");
 250
 251                         return Fill (dataTable, ((IDbDataAdapter) this).SelectCommand, CommandBehavior.Default);
 252                 }
 253
 254                 public int Fill (DataSet dataSet, string srcTable)
 255                 {
 256                         return Fill (dataSet, 0, 0, srcTable, ((IDbDataAdapter) this).SelectCommand, CommandBehavior.Default);
 257                 }
 258
 259 #if NET_2_0
 260                 protected override int Fill (DataTable dataTable, IDataReader dataReader)
 261 #else
 262                 protected virtual int Fill (DataTable dataTable, IDataReader dataReader)
 263 #endif
 264                 {
 265                         if (dataReader.FieldCount == 0) {
 266                                 dataReader.Close ();
 267                                 return 0;
 268                         }
 269
 270                         int count = 0;
 271
 272                         try {
 273                                 string tableName = SetupSchema (SchemaType.Mapped, dataTable.TableName);
 274                                 if (tableName != null) {
 275                                         dataTable.TableName = tableName;
 276                                         FillTable (dataTable, dataReader, 0, 0, ref count);
 277                                 }
 278                         } finally {
 279                                 dataReader.Close ();
 280                         }
 281
 282                         return count;
 283                 }
 284
 285                 protected virtual int Fill (DataTable dataTable, IDbCommand command, CommandBehavior behavior)
 286                 {
 287                         CommandBehavior commandBehavior = behavior;
 288
 289                         // first see that the connection is not close.
 290                         if (command.Connection.State == ConnectionState.Closed)
 291                         {
 292                                 command.Connection.Open ();
 293                                 commandBehavior |= CommandBehavior.CloseConnection;
 294                         }
 295                         return Fill (dataTable, command.ExecuteReader (commandBehavior));
 296                 }
 297
 298 #if NET_2_0
 299                 [MonoTODO]
 300                 public int Fill (int startRecord, int maxRecords, DataTable[] dataTables)
 301                 {
 302                         throw new NotImplementedException ();
 303                 }
 304 #endif
 305
 306                 public int Fill (DataSet dataSet, int startRecord, int maxRecords, string srcTable)
 307                 {
 308                         return this.Fill (dataSet, startRecord, maxRecords, srcTable, ((IDbDataAdapter) this).SelectCommand, CommandBehavior.Default);
 309                 }
 310
 311 #if NET_2_0
 312                 [MonoTODO]
 313                 protected virtual int Fill (DataTable[] dataTables, int startRecord, int maxRecords, IDbCommand command, CommandBehavior behavior)
 314                 {
 315                         throw new NotImplementedException ();
 316                 }
 317 #endif
 318
 319 #if NET_2_0
 320                 protected override int Fill (DataSet dataSet, string srcTable, IDataReader dataReader, int startRecord, int maxRecords)
 321 #else
 322                 protected virtual int Fill (DataSet dataSet, string srcTable, IDataReader dataReader, int startRecord, int maxRecords)
 323 #endif
 324                 {
 325                         if (dataSet == null)
 326                                 throw new ArgumentNullException ("DataSet");
 327
 328                         if (startRecord < 0)
 329                                 throw new ArgumentException ("The startRecord parameter was less than 0.");
 330                         if (maxRecords < 0)
 331                                 throw new ArgumentException ("The maxRecords parameter was less than 0.");
 332
 333                         DataTable dataTable = null;
 334                         int resultIndex = 0;
 335                         int count = 0;
 336
 337                         try {
 338                                 string tableName = srcTable;
 339                                 do {
 340                                         // Non-resultset queries like insert, delete or update aren't processed.
 341                                         if (dataReader.FieldCount != -1)
 342                                         {
 343                                                 tableName = SetupSchema (SchemaType.Mapped, tableName);
 344                                                 if (tableName != null) {
 345
 346                                                         // check if the table exists in the dataset
 347                                                         if (dataSet.Tables.Contains (tableName))
 348                                                                 // get the table from the dataset
 349                                                                 dataTable = dataSet.Tables [tableName];
 350                                                         else {
 351                                                                 // Do not create schema if MissingSchemAction is set to Ignore
 352                                                                 if (this.MissingSchemaAction == MissingSchemaAction.Ignore)
 353                                                                         continue;
 354                                                                 dataTable = dataSet.Tables.Add (tableName);
 355                                                         }
 356
 357                                                         if (!FillTable (dataTable, dataReader, startRecord, maxRecords, ref count)) {
 358                                                                 continue;
 359                                                         }
 360
 361                                                         tableName = String.Format ("{0}{1}", srcTable, ++resultIndex);
 362
 363                                                         startRecord = 0;
 364                                                         maxRecords = 0;
 365                                                 }
 366                                         }
 367                                 } while (dataReader.NextResult ());
 368                         }
 369                         finally {
 370                                 dataReader.Close ();
 371                         }
 372
 373                         return count;
 374                 }
 375
 376                 protected virtual int Fill (DataSet dataSet, int startRecord, int maxRecords, string srcTable, IDbCommand command, CommandBehavior behavior)
 377                 {
 378                         if (MissingSchemaAction == MissingSchemaAction.AddWithKey)
 379                                 behavior |= CommandBehavior.KeyInfo;
 380                         CommandBehavior commandBehavior = behavior;
 381
 382                         if (command.Connection.State == ConnectionState.Closed) {
 383                                 command.Connection.Open ();
 384                                 commandBehavior |= CommandBehavior.CloseConnection;
 385                         }
 386                         return Fill (dataSet, srcTable, command.ExecuteReader (commandBehavior), startRecord, maxRecords);
 387                 }
 388
 389                 private bool FillTable (DataTable dataTable, IDataReader dataReader, int startRecord, int maxRecords, ref int counter)
 390                 {
 391                         if (dataReader.FieldCount == 0)
 392                                 return false;
 393
 394                         int counterStart = counter;
 395
 396                         int[] mapping = BuildSchema (dataReader, dataTable, SchemaType.Mapped);
 397
 398                         int[] sortedMapping = new int[mapping.Length];
 399                         int length = sortedMapping.Length;
 400                         for(int i=0; i < sortedMapping.Length; i++) {
 401                                 if (mapping[i] >= 0)
 402                                         sortedMapping[mapping[i]] = i;
 403                                 else
 404                                         sortedMapping[--length] = i;
 405                         }
 406
 407                         for (int i = 0; i < startRecord; i++) {
 408                                 dataReader.Read ();
 409                         }
 410
 411                         dataTable.BeginLoadData ();
 412                         while (dataReader.Read () && (maxRecords == 0 || (counter - counterStart) < maxRecords)) {
 413                                 try {
 414                                         dataTable.LoadDataRow (dataReader, sortedMapping, length, AcceptChangesDuringFill);
 415                                         counter++;
 416                                 }
 417                                 catch (Exception e) {
 418                                         object[] readerArray = new object[dataReader.FieldCount];
 419                                         object[] tableArray = new object[mapping.Length];
 420                                         // we get the values from the datareader
 421                                         dataReader.GetValues (readerArray);
 422                                         // copy from datareader columns to table columns according to given mapping
 423                                         for (int i = 0; i < mapping.Length; i++) {
 424                                                 if (mapping[i] >= 0) {
 425                                                         tableArray[i] = readerArray[mapping[i]];
 426                                                 }
 427                                         }
 428                                         FillErrorEventArgs args = CreateFillErrorEvent (dataTable, tableArray, e);
 429                                         OnFillError (args);
 430
 431                                         // if args.Continue is not set to true or if a handler is not set, rethrow the error..
 432                                         if(!args.Continue)
 433                                                 throw e;
 434                                 }
 435                         }
 436                         dataTable.EndLoadData ();
 437                         return true;
 438                 }
 439
 440 #if NET_2_0
 441                 /// <summary>
 442                 ///     Fills the given datatable using values from reader. if a value
 443                 ///     for a column is  null, that will be filled with default value.
 444                 /// </summary>
 445                 /// <returns>No. of rows affected </returns>
 446                 internal static int FillFromReader (DataTable table,
 447                                                     IDataReader reader,
 448                                                     int start,
 449                                                     int length,
 450                                                     int [] mapping,
 451                                                     LoadOption loadOption
 452                                                     )
 453                 {
 454                         if (reader.FieldCount == 0)
 455                                 return 0 ;
 456
 457                         for (int i = 0; i < start; i++)
 458                                 reader.Read ();
 459
 460                         int counter = 0;
 461                         object [] values = new object [mapping.Length];
 462                         while (reader.Read () &&
 463                                (length == 0 || counter < length)) {
 464
 465                                 for (int i = 0 ; i < mapping.Length; i++)
 466                                         values [i] = mapping [i] < 0 ? null : reader [mapping [i]];
 467
 468                                 table.BeginLoadData ();
 469                                 table.LoadDataRow (values, loadOption);
 470                                 table.EndLoadData ();
 471                                 counter++;
 472                         }
 473                         return counter;
 474                 }
 475
 476 #endif // NET_2_0
 477
 478                 public override DataTable[] FillSchema (DataSet dataSet, SchemaType schemaType)
 479                 {
 480                         return FillSchema (dataSet, schemaType, ((IDbDataAdapter) this).SelectCommand, DefaultSourceTableName, CommandBehavior.Default);
 481                 }
 482
 483                 public DataTable FillSchema (DataTable dataTable, SchemaType schemaType)
 484                 {
 485                         return FillSchema (dataTable, schemaType, ((IDbDataAdapter) this).SelectCommand, CommandBehavior.Default);
 486                 }
 487
 488                 public DataTable[] FillSchema (DataSet dataSet, SchemaType schemaType, string srcTable)
 489                 {
 490                         return FillSchema (dataSet, schemaType, ((IDbDataAdapter) this).SelectCommand, srcTable, CommandBehavior.Default);
 491                 }
 492
 493                 [MonoTODO ("Verify")]
 494                 protected virtual DataTable FillSchema (DataTable dataTable, SchemaType schemaType, IDbCommand command, CommandBehavior behavior)
 495                 {
 496                         if (dataTable == null)
 497                                 throw new ArgumentNullException ("DataTable");
 498
 499                         behavior |= CommandBehavior.SchemaOnly | CommandBehavior.KeyInfo;
 500                         if (command.Connection.State == ConnectionState.Closed) {
 501                                 command.Connection.Open ();
 502                                 behavior |= CommandBehavior.CloseConnection;
 503                         }
 504
 505                         IDataReader reader = command.ExecuteReader (behavior);
 506                         try
 507                         {
 508                                 string tableName =  SetupSchema (schemaType, dataTable.TableName);
 509                                 if (tableName != null)
 510                                 {
 511                                         // FillSchema should add the KeyInfo unless MissingSchemaAction
 512                                         // is set to Ignore or Error.
 513                                         MissingSchemaAction schemaAction = MissingSchemaAction;
 514                                         if (!(schemaAction == MissingSchemaAction.Ignore ||
 515                                                 schemaAction == MissingSchemaAction.Error))
 516                                                 schemaAction = MissingSchemaAction.AddWithKey;
 517
 518                                         BuildSchema (reader, dataTable, schemaType, schemaAction,
 519                                                 MissingMappingAction, TableMappings);
 520                                 }
 521                         }
 522                         finally
 523                         {
 524                                 reader.Close ();
 525                         }
 526                         return dataTable;
 527                 }
 528
 529                 [MonoTODO ("Verify")]
 530                 protected virtual DataTable[] FillSchema (DataSet dataSet, SchemaType schemaType, IDbCommand command, string srcTable, CommandBehavior behavior)
 531                 {
 532                         if (dataSet == null)
 533                                 throw new ArgumentNullException ("DataSet");
 534
 535                         behavior |= CommandBehavior.SchemaOnly | CommandBehavior.KeyInfo;
 536                         if (command.Connection.State == ConnectionState.Closed) {
 537                                 command.Connection.Open ();
 538                                 behavior |= CommandBehavior.CloseConnection;
 539                         }
 540
 541                         IDataReader reader = command.ExecuteReader (behavior);
 542                         ArrayList output = new ArrayList ();
 543                         string tableName = srcTable;
 544                         int index = 0;
 545                         DataTable table;
 546                         try
 547                         {
 548                                 // FillSchema should add the KeyInfo unless MissingSchemaAction
 549                                 // is set to Ignore or Error.
 550                                 MissingSchemaAction schemaAction = MissingSchemaAction;
 551                                 if (!(MissingSchemaAction == MissingSchemaAction.Ignore ||
 552                                         MissingSchemaAction == MissingSchemaAction.Error))
 553                                         schemaAction = MissingSchemaAction.AddWithKey;
 554
 555                                 do {
 556                                         tableName = SetupSchema (schemaType, tableName);
 557                                         if (tableName != null)
 558                                         {
 559                                                 if (dataSet.Tables.Contains (tableName))
 560                                                         table = dataSet.Tables [tableName];
 561                                                 else
 562                                                 {
 563                                                         // Do not create schema if MissingSchemAction is set to Ignore
 564                                                         if (this.MissingSchemaAction == MissingSchemaAction.Ignore)
 565                                                                 continue;
 566                                                         table =  dataSet.Tables.Add (tableName);
 567                                                 }
 568
 569                                                 BuildSchema (reader, table, schemaType, schemaAction,
 570                                                         MissingMappingAction, TableMappings);
 571                                                 output.Add (table);
 572                                                 tableName = String.Format ("{0}{1}", srcTable, ++index);
 573                                         }
 574                                 }while (reader.NextResult ());
 575                         }
 576                         finally
 577                         {
 578                                 reader.Close ();
 579                         }
 580                         return (DataTable[]) output.ToArray (typeof (DataTable));
 581                 }
 582
 583                 private string SetupSchema (SchemaType schemaType, string sourceTableName)
 584                 {
 585                         DataTableMapping tableMapping = null;
 586
 587                         if (schemaType == SchemaType.Mapped)
 588                         {
 589                                 tableMapping = DataTableMappingCollection.GetTableMappingBySchemaAction (TableMappings, sourceTableName, sourceTableName, MissingMappingAction);
 590                                 if (tableMapping != null)
 591                                         return tableMapping.DataSetTable;
 592                                 return null;
 593                         }
 594                         else
 595                                 return sourceTableName;
 596                 }
 597
 598                 [EditorBrowsable (EditorBrowsableState.Advanced)]
 599                 public override IDataParameter[] GetFillParameters ()
 600                 {
 601                         IDataParameter[] parameters = new IDataParameter[SelectCommand.Parameters.Count];
 602                         SelectCommand.Parameters.CopyTo (parameters, 0);
 603                         return parameters;
 604                 }
 605
 606                 // this method builds the schema for a given datatable. it returns a int array with
 607                 // "array[ordinal of datatable column] == index of source column in data reader".
 608                 // each column in the datatable has a mapping to a specific column in the datareader,
 609                 // the int array represents this match.
 610                 [MonoTODO ("Test")]
 611                 private int[] BuildSchema (IDataReader reader, DataTable table, SchemaType schemaType)
 612                 {
 613                         return BuildSchema (reader, table, schemaType, MissingSchemaAction,
 614                                             MissingMappingAction, TableMappings);
 615                 }
 616
 617                 /// <summary>
 618                 ///     Creates or Modifies the schema of the given DataTable based on the schema of
 619                 ///     the reader and the arguments passed.
 620                 /// </summary>
 621                 internal static int[] BuildSchema (IDataReader reader,
 622                                                    DataTable table,
 623                                                    SchemaType schemaType,
 624                                                    MissingSchemaAction missingSchAction,
 625                                                    MissingMappingAction missingMapAction,
 626                                                    DataTableMappingCollection dtMapping
 627                                                    )
 628                 {
 629                         int readerIndex = 0;
 630                         // FIXME : this fails if query has fewer columns than a table
 631                         int[] mapping = new int[table.Columns.Count]; // mapping the reader indexes to the datatable indexes
 632
 633                         for(int i=0; i < mapping.Length; i++) {
 634                                 mapping[i] = -1;
 635                         }
 636
 637                         ArrayList primaryKey = new ArrayList ();
 638                         ArrayList sourceColumns = new ArrayList ();
 639                         bool createPrimaryKey = true;
 640
 641                         DataTable schemaTable = reader.GetSchemaTable ();
 642
 643                         DataColumn ColumnNameCol =  schemaTable.Columns["ColumnName"];
 644                         DataColumn DataTypeCol = schemaTable.Columns["DataType"];
 645                         DataColumn IsAutoIncrementCol = schemaTable.Columns["IsAutoIncrement"];
 646                         DataColumn AllowDBNullCol = schemaTable.Columns["AllowDBNull"];
 647                         DataColumn IsReadOnlyCol = schemaTable.Columns["IsReadOnly"];
 648                         DataColumn IsKeyCol = schemaTable.Columns["IsKey"];
 649                         DataColumn IsUniqueCol = schemaTable.Columns["IsUnique"];
 650                         DataColumn ColumnSizeCol = schemaTable.Columns["ColumnSize"];
 651
 652                         foreach (DataRow schemaRow in schemaTable.Rows) {
 653                                 // generate a unique column name in the source table.
 654                                 string sourceColumnName;
 655                                 string realSourceColumnName ;
 656                                 if (ColumnNameCol == null || schemaRow.IsNull(ColumnNameCol) || (string)schemaRow [ColumnNameCol] == String.Empty) {
 657                                         sourceColumnName = DefaultSourceColumnName;
 658                                         realSourceColumnName = DefaultSourceColumnName + "1";
 659                                 }
 660                                 else {
 661                                         sourceColumnName = (string) schemaRow [ColumnNameCol];
 662                                         realSourceColumnName = sourceColumnName;
 663                                 }
 664
 665                                 for (int i = 1; sourceColumns.Contains (realSourceColumnName); i += 1)
 666                                         realSourceColumnName = String.Format ("{0}{1}", sourceColumnName, i);
 667                                 sourceColumns.Add(realSourceColumnName);
 668
 669                                 // generate DataSetColumnName from DataTableMapping, if any
 670                                 string dsColumnName = realSourceColumnName;
 671                                 DataTableMapping tableMapping = null;
 672
 673                                 //FIXME : The sourcetable name shud get passed as a parameter..
 674                                 int index = dtMapping.IndexOfDataSetTable (table.TableName);
 675                                 string srcTable = (index != -1 ? dtMapping[index].SourceTable : table.TableName);
 676                                 tableMapping = DataTableMappingCollection.GetTableMappingBySchemaAction (dtMapping, srcTable, table.TableName, missingMapAction);
 677                                 if (tableMapping != null)
 678                                 {
 679                                         table.TableName = tableMapping.DataSetTable;
 680                                         // check to see if the column mapping exists
 681                                         DataColumnMapping columnMapping = DataColumnMappingCollection.GetColumnMappingBySchemaAction(tableMapping.ColumnMappings, realSourceColumnName, missingMapAction);
 682                                         if (columnMapping != null)
 683                                         {
 684                                                 Type columnType = (Type)schemaRow[DataTypeCol];
 685                                                 DataColumn col =
 686                                                         columnMapping.GetDataColumnBySchemaAction(
 687                                                                                                   table ,
 688                                                                                                   columnType,
 689                                                                                                   missingSchAction);
 690
 691                                                 if (col != null)
 692                                                 {
 693                                                         // if the column is not in the table - add it.
 694                                                         if (table.Columns.IndexOf(col) == -1)
 695                                                         {
 696                                                                 if (missingSchAction == MissingSchemaAction.Add
 697                                                                     || missingSchAction == MissingSchemaAction.AddWithKey)
 698                                                                         table.Columns.Add(col);
 699
 700                                                                 int[] tmp = new int[mapping.Length + 1];
 701                                                                 Array.Copy(mapping,0,tmp,0,col.Ordinal);
 702                                                                 Array.Copy(mapping,col.Ordinal,tmp,col.Ordinal + 1,mapping.Length - col.Ordinal);
 703                                                                 mapping = tmp;
 704                                                         }
 705
 706
 707                                                         if (missingSchAction == MissingSchemaAction.AddWithKey) {
 708
 709                                                                 object value = (AllowDBNullCol != null) ? schemaRow[AllowDBNullCol] : null;
 710                                                                 bool allowDBNull = value is bool ? (bool)value : true;
 711
 712                                                                 value = (IsKeyCol != null) ? schemaRow[IsKeyCol] : null;
 713                                                                 bool isKey = value is bool ? (bool)value : false;
 714
 715                                                                 value = (IsAutoIncrementCol != null) ? schemaRow[IsAutoIncrementCol] : null;
 716                                                                 bool isAutoIncrement = value is bool ? (bool)value : false;
 717
 718                                                                 value = (IsReadOnlyCol != null) ? schemaRow[IsReadOnlyCol] : null;
 719                                                                 bool isReadOnly = value is bool ? (bool)value : false;
 720
 721                                                                 value = (IsUniqueCol != null) ? schemaRow[IsUniqueCol] : null;
 722                                                                 bool isUnique = value is bool ? (bool)value : false;
 723
 724                                                                 col.AllowDBNull = allowDBNull;
 725                                                                 // fill woth key info
 726                                                                 if (isAutoIncrement && DataColumn.CanAutoIncrement(columnType)) {
 727                                                                         col.AutoIncrement = true;
 728                                                                         if (!allowDBNull)
 729                                                                                 col.AllowDBNull = false;
 730                                                                 }
 731
 732                                                                 if (columnType == DbTypes.TypeOfString) {
 733                                                                         col.MaxLength = (ColumnSizeCol != null) ? (int)schemaRow[ColumnSizeCol] : 0;
 734                                                                 }
 735
 736                                                                 if (isReadOnly)
 737                                                                         col.ReadOnly = true;
 738
 739                                                                 if (!allowDBNull && (!isReadOnly || isKey))
 740                                                                         col.AllowDBNull = false;
 741                                                                 if (isUnique && !isKey && !columnType.IsArray) {
 742                                                                         col.Unique = true;
 743                                                                         if (!allowDBNull)
 744                                                                                 col.AllowDBNull = false;
 745                                                                 }
 746
 747                                                                 // This might not be set by all DataProviders
 748                                                                 bool isHidden = false;
 749                                                                 if (schemaTable.Columns.Contains ("IsHidden")) {
 750                                                                         value = schemaRow["IsHidden"];
 751                                                                         isHidden = ((value is bool) ? (bool)value : false);
 752                                                                 }
 753
 754                                                                 if (isKey && !isHidden) {
 755                                                                         primaryKey.Add (col);
 756                                                                         if (allowDBNull)
 757                                                                                 createPrimaryKey = false;
 758                                                                 }
 759                                                         }
 760                                                         // add the ordinal of the column as a key and the index of the column in the datareader as a value.
 761                                                         mapping[col.Ordinal] = readerIndex++;
 762                                                 }
 763                                         }
 764                                 }
 765                         }
 766                         if (primaryKey.Count > 0) {
 767                                 DataColumn[] colKey = (DataColumn[])(primaryKey.ToArray(typeof (DataColumn)));
 768                                 if (createPrimaryKey)
 769                                         table.PrimaryKey = colKey;
 770                                 else {
 771                                         UniqueConstraint uConstraint = new UniqueConstraint(colKey);
 772                                         for (int i = 0; i < table.Constraints.Count; i++) {
 773                                                 if (table.Constraints[i].Equals(uConstraint)) {
 774                                                         uConstraint = null;
 775                                                         break;
 776                                                 }
 777                                         }
 778
 779                                         if (uConstraint != null)
 780                                                 table.Constraints.Add(uConstraint);
 781                                 }
 782                         }
 783                         return mapping;
 784                 }
 785
 786                 [MonoTODO]
 787                 object ICloneable.Clone ()
 788                 {
 789                         throw new NotImplementedException ();
 790                 }
 791
 792                 [MonoTODO]
 793                 public int Update (DataRow[] dataRows)
 794                 {
 795                         if (dataRows == null)
 796                                 throw new ArgumentNullException("dataRows");
 797
 798                         if (dataRows.Length == 0)
 799                                 return 0;
 800
 801                         if (dataRows[0] == null)
 802                                 throw new ArgumentException("dataRows[0].");
 803
 804                         DataTable table = dataRows[0].Table;
 805                         if (table == null)
 806                                 throw new ArgumentException("table is null reference.");
 807
 808                         // all rows must be in the same table
 809                         for (int i = 0; i < dataRows.Length; i++)
 810                         {
 811                                 if (dataRows[i] == null)
 812                                         throw new ArgumentException("dataRows[" + i + "].");
 813                                 if (dataRows[i].Table != table)
 814                                         throw new ArgumentException(
 815                                                                     " DataRow["
 816                                                                     + i
 817                                                                     + "] is from a different DataTable than DataRow[0].");
 818                         }
 819
 820                         // get table mapping for this rows
 821                         DataTableMapping tableMapping = TableMappings.GetByDataSetTable(table.TableName);
 822                         if (tableMapping == null)
 823                         {
 824                                 tableMapping = DataTableMappingCollection.GetTableMappingBySchemaAction(
 825                                                                                                         TableMappings,
 826                                                                                                         table.TableName,
 827                                                                                                         table.TableName,
 828                                                                                                         MissingMappingAction);
 829                                 if (tableMapping != null) {
 830                                         foreach (DataColumn col in table.Columns) {
 831                                                 if (tableMapping.ColumnMappings.IndexOf (col.ColumnName) >= 0)
 832                                                         continue;
 833                                                 DataColumnMapping columnMapping = DataColumnMappingCollection.GetColumnMappingBySchemaAction (tableMapping.ColumnMappings, col.ColumnName, MissingMappingAction);
 834                                                 if (columnMapping == null)
 835                                                         columnMapping = new DataColumnMapping (col.ColumnName, col.ColumnName);
 836                                                 tableMapping.ColumnMappings.Add (columnMapping);
 837                                         }
 838                                 } else {
 839                                         ArrayList cmc = new ArrayList ();
 840                                         foreach (DataColumn col in table.Columns)
 841                                                 cmc.Add (new DataColumnMapping (col.ColumnName, col.ColumnName));
 842                                         tableMapping =
 843                                                 new DataTableMapping (
 844                                                                       table.TableName,
 845                                                                       table.TableName,
 846                                                                       cmc.ToArray (typeof (DataColumnMapping)) as DataColumnMapping []);
 847                                 }
 848                         }
 849
 850                         DataRow[] copy = table.NewRowArray(dataRows.Length);
 851                         Array.Copy(dataRows, 0, copy, 0, dataRows.Length);
 852                         return Update(copy, tableMapping);
 853                 }
 854
 855                 public override int Update (DataSet dataSet)
 856                 {
 857                         return Update (dataSet, DefaultSourceTableName);
 858                 }
 859
 860                 public int Update (DataTable dataTable)
 861                 {
 862                         /*
 863                           int index = TableMappings.IndexOfDataSetTable (dataTable.TableName);
 864                           if (index < 0)
 865                           throw new ArgumentException ();
 866                           return Update (dataTable, TableMappings [index]);
 867                         */
 868                         DataTableMapping tableMapping = TableMappings.GetByDataSetTable (dataTable.TableName);
 869                         if (tableMapping == null)
 870                         {
 871                                 tableMapping = DataTableMappingCollection.GetTableMappingBySchemaAction (
 872                                                                                                          TableMappings,
 873                                                                                                          dataTable.TableName,
 874                                                                                                          dataTable.TableName,
 875                                                                                                          MissingMappingAction);
 876                                 if (tableMapping != null) {
 877                                         foreach (DataColumn col in dataTable.Columns) {
 878                                                 if (tableMapping.ColumnMappings.IndexOf (col.ColumnName) >= 0)
 879                                                         continue;
 880                                                 DataColumnMapping columnMapping = DataColumnMappingCollection.GetColumnMappingBySchemaAction (tableMapping.ColumnMappings, col.ColumnName, MissingMappingAction);
 881                                                 if (columnMapping == null)
 882                                                         columnMapping = new DataColumnMapping (col.ColumnName, col.ColumnName);
 883                                                 tableMapping.ColumnMappings.Add (columnMapping);
 884                                         }
 885                                 } else {
 886                                         ArrayList cmc = new ArrayList ();
 887                                         foreach (DataColumn col in dataTable.Columns)
 888                                                 cmc.Add (new DataColumnMapping (col.ColumnName, col.ColumnName));
 889                                         tableMapping =
 890                                                 new DataTableMapping (
 891                                                                       dataTable.TableName,
 892                                                                       dataTable.TableName,
 893                                                                       cmc.ToArray (typeof (DataColumnMapping)) as DataColumnMapping []);
 894                                 }
 895                         }
 896                         return Update (dataTable, tableMapping);
 897                 }
 898
 899                 private int Update (DataTable dataTable, DataTableMapping tableMapping)
 900                 {
 901                         DataRow[] rows = dataTable.NewRowArray(dataTable.Rows.Count);
 902                         dataTable.Rows.CopyTo (rows, 0);
 903                         return Update (rows, tableMapping);
 904                 }
 905
 906                 [MonoTODO]
 907                 protected virtual int Update (DataRow[] dataRows, DataTableMapping tableMapping)
 908                 {
 909                         int updateCount = 0;
 910                         foreach (DataRow row in dataRows) {
 911                                 StatementType statementType = StatementType.Update;
 912                                 IDbCommand command = null;
 913                                 string commandName = String.Empty;
 914
 915                                 switch (row.RowState) {
 916                                 case DataRowState.Added:
 917                                         statementType = StatementType.Insert;
 918                                         command = ((IDbDataAdapter) this).InsertCommand;
 919                                         commandName = "Insert";
 920                                         break;
 921                                 case DataRowState.Deleted:
 922                                         statementType = StatementType.Delete;
 923                                         command = ((IDbDataAdapter) this).DeleteCommand;
 924                                         commandName = "Delete";
 925                                         break;
 926                                 case DataRowState.Modified:
 927                                         statementType = StatementType.Update;
 928                                         command = ((IDbDataAdapter) this).UpdateCommand;
 929                                         commandName = "Update";
 930                                         break;
 931                                 case DataRowState.Unchanged:
 932                                 case DataRowState.Detached:
 933                                         continue;
 934                                 }
 935
 936                                 RowUpdatingEventArgs argsUpdating = CreateRowUpdatingEvent (row, command, statementType, tableMapping);
 937                                 row.RowError = null;
 938                                 OnRowUpdating(argsUpdating);
 939                                 switch(argsUpdating.Status) {
 940                                 case UpdateStatus.Continue :
 941                                         //continue in update operation
 942                                         break;
 943                                 case UpdateStatus.ErrorsOccurred :
 944                                         if (argsUpdating.Errors == null) {
 945                                                 argsUpdating.Errors = ExceptionHelper.RowUpdatedError();
 946                                         }
 947                                         row.RowError += argsUpdating.Errors.Message;
 948                                         if (!ContinueUpdateOnError) {
 949                                                 throw argsUpdating.Errors;
 950                                         }
 951                                         continue;
 952                                 case UpdateStatus.SkipAllRemainingRows :
 953                                         return updateCount;
 954                                 case UpdateStatus.SkipCurrentRow :
 955                                         updateCount++;
 956                                         continue;
 957                                 default :
 958                                         throw ExceptionHelper.InvalidUpdateStatus(argsUpdating.Status);
 959                                 }
 960                                 command = argsUpdating.Command;
 961                                 try {
 962                                         if (command != null) {
 963                                                 DataColumnMappingCollection columnMappings = tableMapping.ColumnMappings;
 964                                                 foreach (IDataParameter parameter in command.Parameters) {
 965                                                         if ((parameter.Direction & ParameterDirection.Input) != 0) {
 966                                                                 string dsColumnName = parameter.SourceColumn;
 967                                                                 if (columnMappings.Contains(parameter.SourceColumn))
 968                                                                         dsColumnName = columnMappings [parameter.SourceColumn].DataSetColumn;
 969                                                                 if (dsColumnName == null || dsColumnName.Length <= 0)
 970                                                                         continue;
 971
 972                                                                 DataRowVersion rowVersion = parameter.SourceVersion;
 973                                                                 // Parameter version is ignored for non-update commands
 974                                                                 if (statementType == StatementType.Delete)
 975                                                                         rowVersion = DataRowVersion.Original;
 976
 977                                                                 parameter.Value = row [dsColumnName, rowVersion];
 978                                                         }
 979                                                 }
 980                                         }
 981                                 }
 982                                 catch (Exception e) {
 983                                         argsUpdating.Errors = e;
 984                                         argsUpdating.Status = UpdateStatus.ErrorsOccurred;
 985                                 }
 986
 987
 988                                 IDataReader reader = null;
 989                                 try {
 990                                         if (command == null) {
 991                                                 throw ExceptionHelper.UpdateRequiresCommand(commandName);
 992                                         }
 993
 994                                         CommandBehavior commandBehavior = CommandBehavior.Default;
 995                                         if (command.Connection.State == ConnectionState.Closed) {
 996                                                 command.Connection.Open ();
 997                                                 commandBehavior |= CommandBehavior.CloseConnection;
 998                                         }
 999
1000                                         // use ExecuteReader because we want to use the commandbehavior parameter.
1001                                         // so the connection will be closed if needed.
1002                                         reader = command.ExecuteReader (commandBehavior);
1003
1004                                         // update the current row, if the update command returns any resultset
1005                                         // ignore other than the first record.
1006                                         DataColumnMappingCollection columnMappings = tableMapping.ColumnMappings;
1007
1008                                         if (command.UpdatedRowSource == UpdateRowSource.Both ||
1009                                             command.UpdatedRowSource == UpdateRowSource.FirstReturnedRecord) {
1010                                                 if (reader.Read ()){
1011                                                         DataTable retSchema = reader.GetSchemaTable ();
1012                                                         foreach (DataRow dr in retSchema.Rows) {
1013                                                                 string columnName = dr ["ColumnName"].ToString ();
1014                                                                 string dstColumnName = columnName;
1015                                                                 if (columnMappings != null &&
1016                                                                     columnMappings.Contains(columnName))
1017                                                                         dstColumnName = columnMappings [dstColumnName].DataSetColumn;
1018                                                                 DataColumn dstColumn = row.Table.Columns [dstColumnName];
1019                                                                 if (dstColumn == null
1020                                                                     || (dstColumn.Expression != null
1021                                                                         && dstColumn.Expression.Length > 0))
1022                                                                         continue;
1023                                                                 // info from : http://www.error-bank.com/microsoft.public.dotnet.framework.windowsforms.databinding/
1024                                                                 // _35_hcsyiv0dha.2328@tk2msftngp10.phx.gbl_Thread.aspx
1025                                                                 // disable readonly for non-expression columns.
1026                                                                 bool readOnlyState = dstColumn.ReadOnly;
1027                                                                 dstColumn.ReadOnly = false;
1028                                                                 try {
1029                                                                         row [dstColumnName] = reader [columnName];
1030                                                                 } finally {
1031                                                                         dstColumn.ReadOnly = readOnlyState;
1032                                                                 }
1033                                                         }
1034                                                 }
1035                                         }
1036                                         reader.Close ();
1037
1038                                         int tmp = reader.RecordsAffected; // records affected is valid only after closing reader
1039                                         // if the execute does not effect any rows we throw an exception.
1040                                         if (tmp == 0)
1041                                                 throw new DBConcurrencyException("Concurrency violation: the " +
1042                                                                                  commandName +"Command affected 0 records.");
1043                                         updateCount += tmp;
1044
1045                                         if (command.UpdatedRowSource == UpdateRowSource.Both ||
1046                                             command.UpdatedRowSource == UpdateRowSource.OutputParameters) {
1047                                                 // Update output parameters to row values
1048                                                 foreach (IDataParameter parameter in command.Parameters) {
1049                                                         if (parameter.Direction != ParameterDirection.InputOutput
1050                                                             && parameter.Direction != ParameterDirection.Output
1051                                                             && parameter.Direction != ParameterDirection.ReturnValue)
1052                                                                 continue;
1053
1054                                                         string dsColumnName = parameter.SourceColumn;
1055                                                         if (columnMappings != null &&
1056                                                             columnMappings.Contains(parameter.SourceColumn))
1057                                                                 dsColumnName = columnMappings [parameter.SourceColumn].DataSetColumn;
1058                                                         DataColumn dstColumn = row.Table.Columns [dsColumnName];
1059                                                         if (dstColumn == null
1060                                                             || (dstColumn.Expression != null
1061                                                                 && dstColumn.Expression.Length > 0))
1062                                                                 continue;
1063                                                         bool readOnlyState = dstColumn.ReadOnly;
1064                                                         dstColumn.ReadOnly  = false;
1065                                                         try {
1066                                                                 row [dsColumnName] = parameter.Value;
1067                                                         } finally {
1068                                                                 dstColumn.ReadOnly = readOnlyState;
1069                                                         }
1070
1071                                                 }
1072                                         }
1073
1074                                         RowUpdatedEventArgs updatedArgs = CreateRowUpdatedEvent(row, command, statementType, tableMapping);
1075                                         OnRowUpdated(updatedArgs);
1076                                         switch(updatedArgs.Status) {
1077                                         case UpdateStatus.Continue:
1078                                                 break;
1079                                         case UpdateStatus.ErrorsOccurred:
1080                                                 if (updatedArgs.Errors == null) {
1081                                                         updatedArgs.Errors = ExceptionHelper.RowUpdatedError();
1082                                                 }
1083                                                 row.RowError += updatedArgs.Errors.Message;
1084                                                 if (!ContinueUpdateOnError) {
1085                                                         throw updatedArgs.Errors;
1086                                                 }
1087                                                 break;
1088                                         case UpdateStatus.SkipCurrentRow:
1089                                                 continue;
1090                                         case UpdateStatus.SkipAllRemainingRows:
1091                                                 return updateCount;
1092                                         }
1093                                         row.AcceptChanges ();
1094                                 } catch(Exception e) {
1095                                         row.RowError = e.Message;
1096                                         if (!ContinueUpdateOnError) {
1097                                                 throw e;
1098                                         }
1099                                 } finally {
1100                                         if (reader != null && ! reader.IsClosed) {
1101                                                 reader.Close ();
1102                                         }
1103                                 }
1104                         }
1105                         return updateCount;
1106                 }
1107
1108                 public int Update (DataSet dataSet, string sourceTable)
1109                 {
1110                         MissingMappingAction mappingAction = MissingMappingAction;
1111
1112                         if (mappingAction == MissingMappingAction.Ignore)
1113                                 mappingAction = MissingMappingAction.Error;
1114
1115                         DataTableMapping tableMapping = DataTableMappingCollection.GetTableMappingBySchemaAction (TableMappings, sourceTable, sourceTable, mappingAction);
1116
1117                         DataTable dataTable = dataSet.Tables[tableMapping.DataSetTable];
1118                         if (dataTable == null)
1119                                 throw new ArgumentException (String.Format ("Missing table {0}",
1120                                                                             sourceTable));
1121                         return Update (dataTable, tableMapping);
1122                 }
1123
1124 #if ONLY_1_0 || ONLY_1_1
1125                 protected virtual void OnFillError (FillErrorEventArgs value)
1126                 {
1127                         if (FillError != null)
1128                                 FillError (this, value);
1129                 }
1130 #endif
1131
1132                 #endregion // Methods
1133         }
1134 }