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.Reflection;
  41 using System.Runtime.InteropServices;
  42
  43 namespace System.Data.Common
  44 {
  45 #if NET_2_0
  46         public abstract class DbDataAdapter : DataAdapter, IDbDataAdapter, IDataAdapter, ICloneable
  47 #else
  48         public abstract class DbDataAdapter : DataAdapter, ICloneable
  49 #endif
  50         {
  51                 #region Fields
  52
  53                 public const string DefaultSourceTableName = "Table";
  54                 const string DefaultSourceColumnName = "Column";
  55                 CommandBehavior _behavior = CommandBehavior.Default;
  56
  57 #if NET_2_0
  58                 IDbCommand _selectCommand;
  59                 IDbCommand _updateCommand;
  60                 IDbCommand _deleteCommand;
  61                 IDbCommand _insertCommand;
  62 #endif
  63
  64                 #endregion // Fields
  65
  66                 #region Constructors
  67
  68                 protected DbDataAdapter ()
  69                 {
  70                 }
  71
  72                 protected DbDataAdapter (DbDataAdapter adapter) : base (adapter)
  73                 {
  74                 }
  75
  76                 #endregion // Fields
  77
  78                 #region Properties
  79
  80 #if NET_2_0
  81                 protected internal CommandBehavior FillCommandBehavior {
  82                         get { return _behavior; }
  83                         set { _behavior = value; }
  84                 }
  85
  86                 IDbCommand IDbDataAdapter.SelectCommand {
  87                         get { return _selectCommand; }
  88                         set { _selectCommand = value; }
  89                 }
  90
  91                 IDbCommand IDbDataAdapter.UpdateCommand{
  92                         get { return _updateCommand; }
  93                         set { _updateCommand = value; }
  94                 }
  95
  96                 IDbCommand IDbDataAdapter.DeleteCommand{
  97                         get { return _deleteCommand; }
  98                         set { _deleteCommand = value; }
  99                 }
 100
 101                 IDbCommand IDbDataAdapter.InsertCommand{
 102                         get { return _insertCommand; }
 103                         set { _insertCommand = value; }
 104                 }
 105
 106                 [Browsable (false)]
 107                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 108                 public DbCommand SelectCommand {
 109                         get { return (DbCommand) ((IDbDataAdapter) this).SelectCommand; }
 110                         set { ((IDbDataAdapter) this).SelectCommand = value; }
 111                 }
 112
 113                 [Browsable (false)]
 114                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 115                 public DbCommand DeleteCommand {
 116                         get { return (DbCommand) ((IDbDataAdapter) this).DeleteCommand; }
 117                         set { ((IDbDataAdapter) this).DeleteCommand = value; }
 118                 }
 119
 120                 [Browsable (false)]
 121                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 122                 public DbCommand InsertCommand {
 123                         get { return (DbCommand) ((IDbDataAdapter) this).InsertCommand; }
 124                         set { ((IDbDataAdapter) this).InsertCommand = value; }
 125                 }
 126
 127                 [Browsable (false)]
 128                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 129                 public DbCommand UpdateCommand {
 130                         get { return (DbCommand) ((IDbDataAdapter) this).UpdateCommand; }
 131                         set { ((IDbDataAdapter) this).UpdateCommand = value; }
 132                 }
 133
 134                 [DefaultValue (1)]
 135                 public virtual int UpdateBatchSize {
 136                         get { return 1; }
 137                         set {
 138                                 if (value != 1)
 139                                         throw new NotSupportedException ();
 140                         }
 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                 [DataCategory ("Fill")]
 166                 [DataSysDescription ("Event triggered when a recoverable error occurs during Fill.")]
 167                 public event FillErrorEventHandler FillError;
 168
 169 #endif
 170                 #endregion // Events
 171
 172                 #region Methods
 173
 174 #if NET_2_0
 175                 protected virtual RowUpdatedEventArgs CreateRowUpdatedEvent (DataRow dataRow, IDbCommand command,
 176                                                                              StatementType statementType,
 177                                                                              DataTableMapping tableMapping)
 178                 {
 179                         return new RowUpdatedEventArgs (dataRow, command, statementType, tableMapping);
 180                 }
 181
 182                 protected virtual RowUpdatingEventArgs CreateRowUpdatingEvent (DataRow dataRow, IDbCommand command,
 183                                                                                StatementType statementType,
 184                                                                                DataTableMapping tableMapping)
 185                 {
 186                         return new RowUpdatingEventArgs (dataRow, command, statementType, tableMapping);
 187                 }
 188
 189                 protected virtual void OnRowUpdated (RowUpdatedEventArgs value)
 190                 {
 191                         if (Events ["RowUpdated"] != null) {
 192                                 Delegate [] rowUpdatedList = Events ["RowUpdated"].GetInvocationList ();
 193                                 foreach (Delegate rowUpdated in rowUpdatedList) {
 194                                         MethodInfo rowUpdatedMethod = rowUpdated.Method;
 195                                         rowUpdatedMethod.Invoke (value, null);
 196                                 }
 197                         }
 198                 }
 199
 200                 protected virtual void OnRowUpdating (RowUpdatingEventArgs value)
 201                 {
 202                         if (Events ["RowUpdating"] != null) {
 203                                 Delegate [] rowUpdatingList = Events ["RowUpdating"].GetInvocationList ();
 204                                 foreach (Delegate rowUpdating in rowUpdatingList) {
 205                                         MethodInfo rowUpdatingMethod = rowUpdating.Method;
 206                                         rowUpdatingMethod.Invoke (value, null);
 207                                 }
 208                         }
 209                 }
 210 #else
 211                 protected abstract RowUpdatedEventArgs CreateRowUpdatedEvent (DataRow dataRow, IDbCommand command,
 212                                                                              StatementType statementType,
 213                                                                              DataTableMapping tableMapping);
 214
 215                 protected abstract RowUpdatingEventArgs CreateRowUpdatingEvent (DataRow dataRow, IDbCommand command,
 216                                                                                StatementType statementType,
 217                                                                                DataTableMapping tableMapping);
 218
 219                 protected abstract void OnRowUpdated (RowUpdatedEventArgs value);
 220                 protected abstract void OnRowUpdating (RowUpdatingEventArgs value);
 221 #endif
 222
 223                 protected override void Dispose (bool disposing)
 224                 {
 225                         if (disposing) {
 226                                 IDbDataAdapter da = (IDbDataAdapter) this;
 227                                 if (da.SelectCommand != null) {
 228                                         da.SelectCommand.Dispose();
 229                                         da.SelectCommand = null;
 230                                 }
 231                                 if (da.InsertCommand != null) {
 232                                         da.InsertCommand.Dispose();
 233                                         da.InsertCommand = null;
 234                                 }
 235                                 if (da.UpdateCommand != null) {
 236                                         da.UpdateCommand.Dispose();
 237                                         da.UpdateCommand = null;
 238                                 }
 239                                 if (da.DeleteCommand != null) {
 240                                         da.DeleteCommand.Dispose();
 241                                         da.DeleteCommand = null;
 242                                 }
 243                         }
 244                 }
 245
 246                 public override int Fill (DataSet dataSet)
 247                 {
 248                         return Fill (dataSet, 0, 0, DefaultSourceTableName, ((IDbDataAdapter) this).SelectCommand, _behavior);
 249                 }
 250
 251                 public int Fill (DataTable dataTable)
 252                 {
 253                         if (dataTable == null)
 254                                 throw new ArgumentNullException ("DataTable");
 255
 256                         return Fill (dataTable, ((IDbDataAdapter) this).SelectCommand, _behavior);
 257                 }
 258
 259                 public int Fill (DataSet dataSet, string srcTable)
 260                 {
 261                         return Fill (dataSet, 0, 0, srcTable, ((IDbDataAdapter) this).SelectCommand, _behavior);
 262                 }
 263
 264 #if !NET_2_0
 265                 protected virtual int Fill (DataTable dataTable, IDataReader dataReader)
 266                 {
 267                         return base.FillInternal (dataTable, dataReader);
 268                 }
 269 #endif
 270
 271                 protected virtual int Fill (DataTable dataTable, IDbCommand command, CommandBehavior behavior)
 272                 {
 273                         CommandBehavior commandBehavior = behavior;
 274
 275                         // first see that the connection is not close.
 276                         if (command.Connection.State == ConnectionState.Closed) {
 277                                 command.Connection.Open ();
 278                                 commandBehavior |= CommandBehavior.CloseConnection;
 279                         }
 280                         return Fill (dataTable, command.ExecuteReader (commandBehavior));
 281                 }
 282
 283                 public int Fill (DataSet dataSet, int startRecord, int maxRecords, string srcTable)
 284                 {
 285                         return this.Fill (dataSet, startRecord, maxRecords, srcTable, ((IDbDataAdapter) this).SelectCommand, _behavior);
 286                 }
 287
 288 #if NET_2_0
 289                 [MonoTODO]
 290                 public int Fill (int startRecord, int maxRecords, params DataTable[] dataTables)
 291                 {
 292                         throw new NotImplementedException ();
 293                 }
 294
 295                 [MonoTODO]
 296                 protected virtual int Fill (DataTable[] dataTables, int startRecord, int maxRecords, IDbCommand command, CommandBehavior behavior)
 297                 {
 298                         throw new NotImplementedException ();
 299                 }
 300 #else
 301                 protected virtual int Fill (DataSet dataSet, string srcTable, IDataReader dataReader, int startRecord, int maxRecords)
 302                 {
 303                         return base.FillInternal (dataSet, srcTable, dataReader, startRecord, maxRecords);
 304                 }
 305 #endif
 306
 307                 protected virtual int Fill (DataSet dataSet, int startRecord, int maxRecords, string srcTable, IDbCommand command, CommandBehavior behavior)
 308                 {
 309                         if (command.Connection == null)
 310                                 throw new InvalidOperationException ("Connection state is closed");
 311
 312                         if (MissingSchemaAction == MissingSchemaAction.AddWithKey)
 313                                 behavior |= CommandBehavior.KeyInfo;
 314                         CommandBehavior commandBehavior = behavior;
 315
 316                         if (command.Connection.State == ConnectionState.Closed) {
 317                                 command.Connection.Open ();
 318                                 commandBehavior |= CommandBehavior.CloseConnection;
 319                         }
 320                         return Fill (dataSet, srcTable, command.ExecuteReader (commandBehavior),
 321                                 startRecord, maxRecords);
 322                 }
 323
 324 #if NET_2_0
 325                 /// <summary>
 326                 /// Fills the given datatable using values from reader. if a value
 327                 /// for a column is  null, that will be filled with default value.
 328                 /// </summary>
 329                 /// <returns>No. of rows affected </returns>
 330                 internal static int FillFromReader (DataTable table,
 331                                                     IDataReader reader,
 332                                                     int start,
 333                                                     int length,
 334                                                     int [] mapping,
 335                                                     LoadOption loadOption
 336                                                     )
 337                 {
 338                         if (reader.FieldCount == 0)
 339                                 return 0 ;
 340
 341                         for (int i = 0; i < start; i++)
 342                                 reader.Read ();
 343
 344                         int counter = 0;
 345                         object [] values = new object [mapping.Length];
 346                         while (reader.Read () && (length == 0 || counter < length)) {
 347                                 for (int i = 0 ; i < mapping.Length; i++)
 348                                         values [i] = mapping [i] < 0 ? null : reader [mapping [i]];
 349                                 table.BeginLoadData ();
 350                                 table.LoadDataRow (values, loadOption);
 351                                 table.EndLoadData ();
 352                                 counter++;
 353                         }
 354                         return counter;
 355                 }
 356
 357                 internal static int FillFromReader (DataTable table,
 358                                                     IDataReader reader,
 359                                                     int start,
 360                                                     int length,
 361                                                     int [] mapping,
 362                                                     LoadOption loadOption,
 363                                                     FillErrorEventHandler errorHandler)
 364                 {
 365                         if (reader.FieldCount == 0)
 366                                 return 0 ;
 367
 368                         for (int i = 0; i < start; i++)
 369                                 reader.Read ();
 370
 371                         int counter = 0;
 372                         object [] values = new object [mapping.Length];
 373                         while (reader.Read () && (length == 0 || counter < length)) {
 374                                 for (int i = 0 ; i < mapping.Length; i++)
 375                                         values [i] = mapping [i] < 0 ? null : reader [mapping [i]];
 376                                 table.BeginLoadData ();
 377                                 try {
 378                                         table.LoadDataRow (values, loadOption);
 379                                 } catch (Exception e) {
 380                                         FillErrorEventArgs args = new FillErrorEventArgs (table, values);
 381                                         args.Errors = e;
 382                                         args.Continue = false;
 383                                         errorHandler (table, args);
 384                                         // if args.Continue is not set to true or if a handler is not set, rethrow the error..
 385                                         if(!args.Continue)
 386                                                 throw e;
 387                                 }
 388                                 table.EndLoadData ();
 389                                 counter++;
 390                         }
 391                         return counter;
 392                 }
 393 #endif // NET_2_0
 394
 395                 public override DataTable [] FillSchema (DataSet dataSet, SchemaType schemaType)
 396                 {
 397                         return FillSchema (dataSet, schemaType, ((IDbDataAdapter) this).SelectCommand, DefaultSourceTableName, _behavior);
 398                 }
 399
 400                 public DataTable FillSchema (DataTable dataTable, SchemaType schemaType)
 401                 {
 402                         return FillSchema (dataTable, schemaType, ((IDbDataAdapter) this).SelectCommand, _behavior);
 403                 }
 404
 405                 public DataTable [] FillSchema (DataSet dataSet, SchemaType schemaType, string srcTable)
 406                 {
 407                         return FillSchema (dataSet, schemaType, ((IDbDataAdapter) this).SelectCommand, srcTable, _behavior);
 408                 }
 409
 410                 protected virtual DataTable FillSchema (DataTable dataTable, SchemaType schemaType, IDbCommand command, CommandBehavior behavior)
 411                 {
 412                         if (dataTable == null)
 413                                 throw new ArgumentNullException ("DataTable");
 414
 415                         behavior |= CommandBehavior.SchemaOnly | CommandBehavior.KeyInfo;
 416                         if (command.Connection.State == ConnectionState.Closed) {
 417                                 command.Connection.Open ();
 418                                 behavior |= CommandBehavior.CloseConnection;
 419                         }
 420
 421                         IDataReader reader = command.ExecuteReader (behavior);
 422                         try {
 423                                 string tableName =  SetupSchema (schemaType, dataTable.TableName);
 424                                 if (tableName != null) {
 425                                         // FillSchema should add the KeyInfo unless MissingSchemaAction
 426                                         // is set to Ignore or Error.
 427                                         MissingSchemaAction schemaAction = MissingSchemaAction;
 428                                         if (!(schemaAction == MissingSchemaAction.Ignore ||
 429                                                 schemaAction == MissingSchemaAction.Error))
 430                                                 schemaAction = MissingSchemaAction.AddWithKey;
 431
 432                                         BuildSchema (reader, dataTable, schemaType, schemaAction,
 433                                                 MissingMappingAction, TableMappings);
 434                                 }
 435                         } finally {
 436                                 reader.Close ();
 437                         }
 438                         return dataTable;
 439                 }
 440
 441                 protected virtual DataTable[] FillSchema (DataSet dataSet, SchemaType schemaType, IDbCommand command, string srcTable, CommandBehavior behavior)
 442                 {
 443                         if (dataSet == null)
 444                                 throw new ArgumentNullException ("DataSet");
 445
 446                         behavior |= CommandBehavior.SchemaOnly | CommandBehavior.KeyInfo;
 447                         if (command.Connection.State == ConnectionState.Closed) {
 448                                 command.Connection.Open ();
 449                                 behavior |= CommandBehavior.CloseConnection;
 450                         }
 451
 452                         IDataReader reader = command.ExecuteReader (behavior);
 453                         ArrayList output = new ArrayList ();
 454                         string tableName = srcTable;
 455                         int index = 0;
 456                         DataTable table;
 457                         try {
 458                                 // FillSchema should add the KeyInfo unless MissingSchemaAction
 459                                 // is set to Ignore or Error.
 460                                 MissingSchemaAction schemaAction = MissingSchemaAction;
 461                                 if (!(MissingSchemaAction == MissingSchemaAction.Ignore ||
 462                                         MissingSchemaAction == MissingSchemaAction.Error))
 463                                         schemaAction = MissingSchemaAction.AddWithKey;
 464
 465                                 do {
 466                                         tableName = SetupSchema (schemaType, tableName);
 467                                         if (tableName != null) {
 468                                                 if (dataSet.Tables.Contains (tableName))
 469                                                         table = dataSet.Tables [tableName];
 470                                                 else {
 471                                                         // Do not create schema if MissingSchemAction is set to Ignore
 472                                                         if (this.MissingSchemaAction == MissingSchemaAction.Ignore)
 473                                                                 continue;
 474                                                         table =  dataSet.Tables.Add (tableName);
 475                                                 }
 476
 477                                                 BuildSchema (reader, table, schemaType, schemaAction,
 478                                                         MissingMappingAction, TableMappings);
 479                                                 output.Add (table);
 480                                                 tableName = String.Format ("{0}{1}", srcTable, ++index);
 481                                         }
 482                                 }while (reader.NextResult ());
 483                         } finally {
 484                                 reader.Close ();
 485                         }
 486                         return (DataTable []) output.ToArray (typeof (DataTable));
 487                 }
 488
 489                 [EditorBrowsable (EditorBrowsableState.Advanced)]
 490                 public override IDataParameter[] GetFillParameters ()
 491                 {
 492                         IDataParameter[] parameters = new IDataParameter [SelectCommand.Parameters.Count];
 493                         SelectCommand.Parameters.CopyTo (parameters, 0);
 494                         return parameters;
 495                 }
 496
 497                 [MonoTODO]
 498                 [Obsolete ("use 'protected DbDataAdapter(DbDataAdapter)' ctor")]
 499                 object ICloneable.Clone ()
 500                 {
 501                         throw new NotImplementedException ();
 502                 }
 503
 504                 public int Update (DataRow [] dataRows)
 505                 {
 506                         if (dataRows == null)
 507                                 throw new ArgumentNullException("dataRows");
 508
 509                         if (dataRows.Length == 0)
 510                                 return 0;
 511
 512                         if (dataRows [0] == null)
 513                                 throw new ArgumentException("dataRows[0].");
 514
 515                         DataTable table = dataRows [0].Table;
 516                         if (table == null)
 517                                 throw new ArgumentException("table is null reference.");
 518
 519                         // all rows must be in the same table
 520                         for (int i = 0; i < dataRows.Length; i++) {
 521                                 if (dataRows [i] == null)
 522                                         throw new ArgumentException ("dataRows[" + i + "].");
 523                                 if (dataRows [i].Table != table)
 524                                         throw new ArgumentException(
 525                                                                     " DataRow["
 526                                                                     + i
 527                                                                     + "] is from a different DataTable than DataRow[0].");
 528                         }
 529
 530                         // get table mapping for this rows
 531                         DataTableMapping tableMapping = TableMappings.GetByDataSetTable(table.TableName);
 532                         if (tableMapping == null) {
 533                                 tableMapping = DataTableMappingCollection.GetTableMappingBySchemaAction(
 534                                                                                                         TableMappings,
 535                                                                                                         table.TableName,
 536                                                                                                         table.TableName,
 537                                                                                                         MissingMappingAction);
 538                                 if (tableMapping != null) {
 539                                         foreach (DataColumn col in table.Columns) {
 540                                                 if (tableMapping.ColumnMappings.IndexOf (col.ColumnName) >= 0)
 541                                                         continue;
 542                                                 DataColumnMapping columnMapping = DataColumnMappingCollection.GetColumnMappingBySchemaAction (tableMapping.ColumnMappings, col.ColumnName, MissingMappingAction);
 543                                                 if (columnMapping == null)
 544                                                         columnMapping = new DataColumnMapping (col.ColumnName, col.ColumnName);
 545                                                 tableMapping.ColumnMappings.Add (columnMapping);
 546                                         }
 547                                 } else {
 548                                         ArrayList cmc = new ArrayList ();
 549                                         foreach (DataColumn col in table.Columns)
 550                                                 cmc.Add (new DataColumnMapping (col.ColumnName, col.ColumnName));
 551                                         tableMapping =
 552                                                 new DataTableMapping (
 553                                                                       table.TableName,
 554                                                                       table.TableName,
 555                                                                       cmc.ToArray (typeof (DataColumnMapping)) as DataColumnMapping []);
 556                                 }
 557                         }
 558
 559                         DataRow[] copy = table.NewRowArray (dataRows.Length);
 560                         Array.Copy (dataRows, 0, copy, 0, dataRows.Length);
 561                         return Update (copy, tableMapping);
 562                 }
 563
 564                 public override int Update (DataSet dataSet)
 565                 {
 566                         return Update (dataSet, DefaultSourceTableName);
 567                 }
 568
 569                 public int Update (DataTable dataTable)
 570                 {
 571                         /*
 572                           int index = TableMappings.IndexOfDataSetTable (dataTable.TableName);
 573                           if (index < 0)
 574                           throw new ArgumentException ();
 575                           return Update (dataTable, TableMappings [index]);
 576                         */
 577                         DataTableMapping tableMapping = TableMappings.GetByDataSetTable (dataTable.TableName);
 578                         if (tableMapping == null) {
 579                                 tableMapping = DataTableMappingCollection.GetTableMappingBySchemaAction (
 580                                                                                                          TableMappings,
 581                                                                                                          dataTable.TableName,
 582                                                                                                          dataTable.TableName,
 583                                                                                                          MissingMappingAction);
 584                                 if (tableMapping != null) {
 585                                         foreach (DataColumn col in dataTable.Columns) {
 586                                                 if (tableMapping.ColumnMappings.IndexOf (col.ColumnName) >= 0)
 587                                                         continue;
 588                                                 DataColumnMapping columnMapping = DataColumnMappingCollection.GetColumnMappingBySchemaAction (tableMapping.ColumnMappings, col.ColumnName, MissingMappingAction);
 589                                                 if (columnMapping == null)
 590                                                         columnMapping = new DataColumnMapping (col.ColumnName, col.ColumnName);
 591                                                 tableMapping.ColumnMappings.Add (columnMapping);
 592                                         }
 593                                 } else {
 594                                         ArrayList cmc = new ArrayList ();
 595                                         foreach (DataColumn col in dataTable.Columns)
 596                                                 cmc.Add (new DataColumnMapping (col.ColumnName, col.ColumnName));
 597                                         tableMapping =
 598                                                 new DataTableMapping (
 599                                                                       dataTable.TableName,
 600                                                                       dataTable.TableName,
 601                                                                       cmc.ToArray (typeof (DataColumnMapping)) as DataColumnMapping []);
 602                                 }
 603                         }
 604                         return Update (dataTable, tableMapping);
 605                 }
 606
 607                 private int Update (DataTable dataTable, DataTableMapping tableMapping)
 608                 {
 609                         DataRow [] rows = dataTable.NewRowArray(dataTable.Rows.Count);
 610                         dataTable.Rows.CopyTo (rows, 0);
 611                         return Update (rows, tableMapping);
 612                 }
 613
 614                 protected virtual int Update (DataRow [] dataRows, DataTableMapping tableMapping)
 615                 {
 616                         int updateCount = 0;
 617                         foreach (DataRow row in dataRows) {
 618                                 StatementType statementType = StatementType.Update;
 619                                 IDbCommand command = null;
 620                                 string commandName = String.Empty;
 621
 622                                 switch (row.RowState) {
 623                                 case DataRowState.Added:
 624                                         statementType = StatementType.Insert;
 625                                         command = ((IDbDataAdapter) this).InsertCommand;
 626                                         commandName = "Insert";
 627                                         break;
 628                                 case DataRowState.Deleted:
 629                                         statementType = StatementType.Delete;
 630                                         command = ((IDbDataAdapter) this).DeleteCommand;
 631                                         commandName = "Delete";
 632                                         break;
 633                                 case DataRowState.Modified:
 634                                         statementType = StatementType.Update;
 635                                         command = ((IDbDataAdapter) this).UpdateCommand;
 636                                         commandName = "Update";
 637                                         break;
 638                                 case DataRowState.Unchanged:
 639                                 case DataRowState.Detached:
 640                                         continue;
 641                                 }
 642
 643                                 RowUpdatingEventArgs argsUpdating = CreateRowUpdatingEvent (row, command, statementType, tableMapping);
 644                                 row.RowError = null;
 645                                 OnRowUpdating (argsUpdating);
 646                                 switch (argsUpdating.Status) {
 647                                 case UpdateStatus.Continue :
 648                                         //continue in update operation
 649                                         break;
 650                                 case UpdateStatus.ErrorsOccurred :
 651                                         if (argsUpdating.Errors == null)
 652                                                 argsUpdating.Errors = ExceptionHelper.RowUpdatedError();
 653                                         row.RowError += argsUpdating.Errors.Message;
 654                                         if (!ContinueUpdateOnError)
 655                                                 throw argsUpdating.Errors;
 656                                         continue;
 657                                 case UpdateStatus.SkipAllRemainingRows :
 658                                         return updateCount;
 659                                 case UpdateStatus.SkipCurrentRow :
 660                                         updateCount++;
 661                                         continue;
 662                                 default :
 663                                         throw ExceptionHelper.InvalidUpdateStatus (argsUpdating.Status);
 664                                 }
 665                                 command = argsUpdating.Command;
 666                                 try {
 667                                         if (command != null) {
 668                                                 DataColumnMappingCollection columnMappings = tableMapping.ColumnMappings;
 669                                                 IDataParameter nullCheckParam = null;
 670                                                 foreach (IDataParameter parameter in command.Parameters) {
 671                                                         if ((parameter.Direction & ParameterDirection.Input) != 0) {
 672                                                                 string dsColumnName = parameter.SourceColumn;
 673                                                                 if (columnMappings.Contains(parameter.SourceColumn))
 674                                                                         dsColumnName = columnMappings [parameter.SourceColumn].DataSetColumn;
 675                                                                 if (dsColumnName == null || dsColumnName.Length <= 0) {
 676                                                                         nullCheckParam = parameter;
 677                                                                         continue;
 678                                                                 }
 679
 680                                                                 DataRowVersion rowVersion = parameter.SourceVersion;
 681                                                                 // Parameter version is ignored for non-update commands
 682                                                                 if (statementType == StatementType.Delete)
 683                                                                         rowVersion = DataRowVersion.Original;
 684
 685                                                                 parameter.Value = row [dsColumnName, rowVersion];
 686                                                                 if (nullCheckParam != null && (parameter.Value != null
 687                                                                         && parameter.Value != DBNull.Value)) {
 688                                                                         nullCheckParam.Value = 0;
 689                                                                         nullCheckParam = null;
 690                                                                 }
 691                                                         }
 692                                                 }
 693                                         }
 694                                 } catch (Exception e) {
 695                                         argsUpdating.Errors = e;
 696                                         argsUpdating.Status = UpdateStatus.ErrorsOccurred;
 697                                 }
 698
 699                                 IDataReader reader = null;
 700                                 try {
 701                                         if (command == null)
 702                                                 throw ExceptionHelper.UpdateRequiresCommand (commandName);
 703
 704                                         CommandBehavior commandBehavior = CommandBehavior.Default;
 705                                         if (command.Connection.State == ConnectionState.Closed) {
 706                                                 command.Connection.Open ();
 707                                                 commandBehavior |= CommandBehavior.CloseConnection;
 708                                         }
 709
 710                                         // use ExecuteReader because we want to use the commandbehavior parameter.
 711                                         // so the connection will be closed if needed.
 712                                         reader = command.ExecuteReader (commandBehavior);
 713
 714                                         // update the current row, if the update command returns any resultset
 715                                         // ignore other than the first record.
 716                                         DataColumnMappingCollection columnMappings = tableMapping.ColumnMappings;
 717
 718                                         if (command.UpdatedRowSource == UpdateRowSource.Both ||
 719                                             command.UpdatedRowSource == UpdateRowSource.FirstReturnedRecord) {
 720                                                 if (reader.Read ()){
 721                                                         DataTable retSchema = reader.GetSchemaTable ();
 722                                                         foreach (DataRow dr in retSchema.Rows) {
 723                                                                 string columnName = dr ["ColumnName"].ToString ();
 724                                                                 string dstColumnName = columnName;
 725                                                                 if (columnMappings != null &&
 726                                                                     columnMappings.Contains(columnName))
 727                                                                         dstColumnName = columnMappings [dstColumnName].DataSetColumn;
 728                                                                 DataColumn dstColumn = row.Table.Columns [dstColumnName];
 729                                                                 if (dstColumn == null
 730                                                                     || (dstColumn.Expression != null
 731                                                                         && dstColumn.Expression.Length > 0))
 732                                                                         continue;
 733                                                                 // info from : http://www.error-bank.com/microsoft.public.dotnet.framework.windowsforms.databinding/
 734                                                                 // _35_hcsyiv0dha.2328@tk2msftngp10.phx.gbl_Thread.aspx
 735                                                                 // disable readonly for non-expression columns.
 736                                                                 bool readOnlyState = dstColumn.ReadOnly;
 737                                                                 dstColumn.ReadOnly = false;
 738                                                                 try {
 739                                                                         row [dstColumnName] = reader [columnName];
 740                                                                 } finally {
 741                                                                         dstColumn.ReadOnly = readOnlyState;
 742                                                                 }
 743                                                         }
 744                                                 }
 745                                         }
 746                                         reader.Close ();
 747
 748                                         int tmp = reader.RecordsAffected; // records affected is valid only after closing reader
 749                                         // if the execute does not effect any rows we throw an exception.
 750                                         if (tmp == 0)
 751                                                 throw new DBConcurrencyException("Concurrency violation: the " +
 752                                                         commandName +"Command affected 0 records.");
 753                                         updateCount += tmp;
 754
 755                                         if (command.UpdatedRowSource == UpdateRowSource.Both ||
 756                                             command.UpdatedRowSource == UpdateRowSource.OutputParameters) {
 757                                                 // Update output parameters to row values
 758                                                 foreach (IDataParameter parameter in command.Parameters) {
 759                                                         if (parameter.Direction != ParameterDirection.InputOutput
 760                                                             && parameter.Direction != ParameterDirection.Output
 761                                                             && parameter.Direction != ParameterDirection.ReturnValue)
 762                                                                 continue;
 763
 764                                                         string dsColumnName = parameter.SourceColumn;
 765                                                         if (columnMappings != null &&
 766                                                             columnMappings.Contains(parameter.SourceColumn))
 767                                                                 dsColumnName = columnMappings [parameter.SourceColumn].DataSetColumn;
 768                                                         DataColumn dstColumn = row.Table.Columns [dsColumnName];
 769                                                         if (dstColumn == null
 770                                                             || (dstColumn.Expression != null
 771                                                                 && dstColumn.Expression.Length > 0))
 772                                                                 continue;
 773                                                         bool readOnlyState = dstColumn.ReadOnly;
 774                                                         dstColumn.ReadOnly  = false;
 775                                                         try {
 776                                                                 row [dsColumnName] = parameter.Value;
 777                                                         } finally {
 778                                                                 dstColumn.ReadOnly = readOnlyState;
 779                                                         }
 780                                                 }
 781                                         }
 782
 783                                         RowUpdatedEventArgs updatedArgs = CreateRowUpdatedEvent (row, command, statementType, tableMapping);
 784                                         OnRowUpdated (updatedArgs);
 785                                         switch (updatedArgs.Status) {
 786                                         case UpdateStatus.Continue:
 787                                                 break;
 788                                         case UpdateStatus.ErrorsOccurred:
 789                                                 if (updatedArgs.Errors == null)
 790                                                         updatedArgs.Errors = ExceptionHelper.RowUpdatedError();
 791                                                 row.RowError += updatedArgs.Errors.Message;
 792                                                 if (!ContinueUpdateOnError)
 793                                                         throw updatedArgs.Errors;
 794                                                 break;
 795                                         case UpdateStatus.SkipCurrentRow:
 796                                                 continue;
 797                                         case UpdateStatus.SkipAllRemainingRows:
 798                                                 return updateCount;
 799                                         }
 800 #if NET_2_0
 801                                         if (!AcceptChangesDuringUpdate)
 802                                                 continue;
 803 #endif
 804                                         row.AcceptChanges ();
 805                                 } catch (Exception e) {
 806                                         row.RowError = e.Message;
 807                                         if (!ContinueUpdateOnError)
 808                                                 throw e;
 809                                 } finally {
 810                                         if (reader != null && ! reader.IsClosed)
 811                                                 reader.Close ();
 812                                 }
 813                         }
 814                         return updateCount;
 815                 }
 816
 817                 public int Update (DataSet dataSet, string srcTable)
 818                 {
 819                         MissingMappingAction mappingAction = MissingMappingAction;
 820
 821                         if (mappingAction == MissingMappingAction.Ignore)
 822                                 mappingAction = MissingMappingAction.Error;
 823
 824                         DataTableMapping tableMapping = DataTableMappingCollection.GetTableMappingBySchemaAction (TableMappings, srcTable, srcTable, mappingAction);
 825
 826                         DataTable dataTable = dataSet.Tables [tableMapping.DataSetTable];
 827                         if (dataTable == null)
 828                                 throw new ArgumentException (String.Format ("Missing table {0}",
 829                                                                             srcTable));
 830                         return Update (dataTable, tableMapping);
 831                 }
 832
 833 #if NET_2_0
 834                 // All the batch methods, should be implemented, if supported,
 835                 // by individual providers
 836
 837                 protected virtual int AddToBatch (IDbCommand command)
 838                 {
 839                         throw CreateMethodNotSupportedException ();
 840                 }
 841
 842                 protected virtual void ClearBatch ()
 843                 {
 844                         throw CreateMethodNotSupportedException ();
 845                 }
 846
 847                 protected virtual int ExecuteBatch ()
 848                 {
 849                         throw CreateMethodNotSupportedException ();
 850                 }
 851
 852                 protected virtual IDataParameter GetBatchedParameter (int commandIdentifier, int parameterIndex)
 853                 {
 854                         throw CreateMethodNotSupportedException ();
 855                 }
 856
 857                 protected virtual bool GetBatchedRecordsAffected (int commandIdentifier, out int recordsAffected, out Exception error)
 858                 {
 859                         recordsAffected = 1;
 860                         error = null;
 861                         return true;
 862                 }
 863
 864                 protected virtual void InitializeBatching ()
 865                 {
 866                         throw CreateMethodNotSupportedException ();
 867                 }
 868
 869                 protected virtual void TerminateBatching ()
 870                 {
 871                         throw CreateMethodNotSupportedException ();
 872                 }
 873
 874                 Exception CreateMethodNotSupportedException ()
 875                 {
 876                         return new NotSupportedException ("Method is not supported.");
 877                 }
 878 #else
 879                 internal override void OnFillErrorInternal (FillErrorEventArgs value)
 880                 {
 881                         OnFillError (value);
 882                 }
 883
 884                 protected virtual void OnFillError (FillErrorEventArgs value)
 885                 {
 886                         if (FillError != null)
 887                                 FillError (this, value);
 888                 }
 889 #endif
 890                 #endregion // Methods
 891         }
 892 }