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 //   Veerapuram Varadhan  <vvaradhan@novell.com>
   9 //
  10 // (C) Ximian, Inc
  11 // Copyright (C) Tim Coleman, 2002-2003
  12 //
  13
  14 //
  15 // Copyright (C) 2004, 2009 Novell, Inc (http://www.novell.com)
  16 //
  17 // Permission is hereby granted, free of charge, to any person obtaining
  18 // a copy of this software and associated documentation files (the
  19 // "Software"), to deal in the Software without restriction, including
  20 // without limitation the rights to use, copy, modify, merge, publish,
  21 // distribute, sublicense, and/or sell copies of the Software, and to
  22 // permit persons to whom the Software is furnished to do so, subject to
  23 // the following conditions:
  24 //
  25 // The above copyright notice and this permission notice shall be
  26 // included in all copies or substantial portions of the Software.
  27 //
  28 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  29 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  30 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  31 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  32 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  33 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  34 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  35 //
  36
  37 using System;
  38 using System.Collections;
  39 using System.ComponentModel;
  40 using System.Data;
  41 using System.Reflection;
  42 using System.Runtime.InteropServices;
  43
  44 namespace System.Data.Common
  45 {
  46         public abstract class DbDataAdapter : DataAdapter, IDbDataAdapter, IDataAdapter, ICloneable
  47         {
  48                 #region Fields
  49
  50                 public const string DefaultSourceTableName = "Table";
  51                 const string DefaultSourceColumnName = "Column";
  52                 CommandBehavior _behavior = CommandBehavior.Default;
  53
  54                 IDbCommand _selectCommand;
  55                 IDbCommand _updateCommand;
  56                 IDbCommand _deleteCommand;
  57                 IDbCommand _insertCommand;
  58
  59                 #endregion // Fields
  60
  61                 #region Constructors
  62
  63                 protected DbDataAdapter ()
  64                 {
  65                 }
  66
  67                 protected DbDataAdapter (DbDataAdapter adapter) : base (adapter)
  68                 {
  69                 }
  70
  71                 #endregion // Fields
  72
  73                 #region Properties
  74
  75                 protected internal CommandBehavior FillCommandBehavior {
  76                         get { return _behavior; }
  77                         set { _behavior = value; }
  78                 }
  79
  80                 IDbCommand IDbDataAdapter.SelectCommand {
  81                     get { return ((DbDataAdapter)this).SelectCommand; }
  82                     set { ((DbDataAdapter)this).SelectCommand = (DbCommand)value; }
  83                 }
  84
  85                 IDbCommand IDbDataAdapter.UpdateCommand{
  86                     get { return ((DbDataAdapter)this).UpdateCommand; }
  87                     set { ((DbDataAdapter)this).UpdateCommand = (DbCommand)value; }
  88                 }
  89
  90                 IDbCommand IDbDataAdapter.DeleteCommand{
  91                     get { return ((DbDataAdapter)this).DeleteCommand; }
  92                     set { ((DbDataAdapter)this).DeleteCommand = (DbCommand)value; }
  93                 }
  94
  95                 IDbCommand IDbDataAdapter.InsertCommand{
  96                     get { return ((DbDataAdapter)this).InsertCommand; }
  97                     set { ((DbDataAdapter)this).InsertCommand = (DbCommand)value; }
  98                 }
  99
 100                 [Browsable (false)]
 101                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 102                 public DbCommand SelectCommand {
 103                     get {
 104                                         return (DbCommand) _selectCommand;
 105                                         //return (DbCommand) ((IDbDataAdapter)this).SelectCommand;
 106                         }
 107                     set {
 108                                         if (_selectCommand != value) {
 109                                                 _selectCommand = value;
 110                                                 ((IDbDataAdapter)this).SelectCommand = value;
 111                                         }
 112                         }
 113                 }
 114
 115                 [Browsable (false)]
 116                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 117                 public DbCommand DeleteCommand {
 118                     get {
 119                                         return (DbCommand) _deleteCommand;
 120                                         //return (DbCommand) ((IDbDataAdapter)this).DeleteCommand;
 121                         }
 122                     set {
 123                                         if (_deleteCommand != value) {
 124                                                 _deleteCommand = value;
 125                                                 ((IDbDataAdapter)this).DeleteCommand = value;
 126                                         }
 127                         }
 128                 }
 129
 130                 [Browsable (false)]
 131                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 132                 public DbCommand InsertCommand {
 133                     get {
 134                                         return (DbCommand) _insertCommand;
 135                                         //return (DbCommand) ((IDbDataAdapter)this).InsertCommand;
 136                         }
 137                     set {
 138                                         if (_insertCommand != value) {
 139                                                 _insertCommand = value;
 140                                                 ((IDbDataAdapter)this).InsertCommand = value;
 141                                         }
 142                         }
 143                 }
 144
 145                 [Browsable (false)]
 146                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 147                 public DbCommand UpdateCommand {
 148                     get {
 149                                         return (DbCommand) _updateCommand;
 150                                         //return (DbCommand) ((IDbDataAdapter)this).DeleteCommand;
 151                         }
 152                     set {
 153                                         if (_updateCommand != value) {
 154                                                 _updateCommand = value;
 155                                                 ((IDbDataAdapter)this).UpdateCommand = value;
 156                                         }
 157                         }
 158                 }
 159
 160                 [DefaultValue (1)]
 161                 public virtual int UpdateBatchSize {
 162                         get { return 1; }
 163                         set {
 164                                 if (value != 1)
 165                                         throw new NotSupportedException ();
 166                         }
 167                 }
 168
 169                 #endregion // Properties
 170
 171                 #region Methods
 172
 173                 protected virtual RowUpdatedEventArgs CreateRowUpdatedEvent (DataRow dataRow, IDbCommand command,
 174                                                                              StatementType statementType,
 175                                                                              DataTableMapping tableMapping)
 176                 {
 177                         return new RowUpdatedEventArgs (dataRow, command, statementType, tableMapping);
 178                 }
 179
 180                 protected virtual RowUpdatingEventArgs CreateRowUpdatingEvent (DataRow dataRow, IDbCommand command,
 181                                                                                StatementType statementType,
 182                                                                                DataTableMapping tableMapping)
 183                 {
 184                         return new RowUpdatingEventArgs (dataRow, command, statementType, tableMapping);
 185                 }
 186
 187                 protected virtual void OnRowUpdated (RowUpdatedEventArgs value)
 188                 {
 189                         if (Events ["RowUpdated"] != null) {
 190                                 Delegate [] rowUpdatedList = Events ["RowUpdated"].GetInvocationList ();
 191                                 foreach (Delegate rowUpdated in rowUpdatedList) {
 192                                         MethodInfo rowUpdatedMethod = rowUpdated.Method;
 193                                         rowUpdatedMethod.Invoke (value, null);
 194                                 }
 195                         }
 196                 }
 197
 198                 protected virtual void OnRowUpdating (RowUpdatingEventArgs value)
 199                 {
 200                         if (Events ["RowUpdating"] != null) {
 201                                 Delegate [] rowUpdatingList = Events ["RowUpdating"].GetInvocationList ();
 202                                 foreach (Delegate rowUpdating in rowUpdatingList) {
 203                                         MethodInfo rowUpdatingMethod = rowUpdating.Method;
 204                                         rowUpdatingMethod.Invoke (value, null);
 205                                 }
 206                         }
 207                 }
 208
 209                 protected override void Dispose (bool disposing)
 210                 {
 211                         if (disposing) {
 212                                 IDbDataAdapter da = (IDbDataAdapter) this;
 213                                 if (da.SelectCommand != null) {
 214                                         da.SelectCommand.Dispose();
 215                                         da.SelectCommand = null;
 216                                 }
 217                                 if (da.InsertCommand != null) {
 218                                         da.InsertCommand.Dispose();
 219                                         da.InsertCommand = null;
 220                                 }
 221                                 if (da.UpdateCommand != null) {
 222                                         da.UpdateCommand.Dispose();
 223                                         da.UpdateCommand = null;
 224                                 }
 225                                 if (da.DeleteCommand != null) {
 226                                         da.DeleteCommand.Dispose();
 227                                         da.DeleteCommand = null;
 228                                 }
 229                         }
 230                 }
 231
 232                 public override int Fill (DataSet dataSet)
 233                 {
 234                         return Fill (dataSet, 0, 0, DefaultSourceTableName, ((IDbDataAdapter) this).SelectCommand, _behavior);
 235                 }
 236
 237                 public int Fill (DataTable dataTable)
 238                 {
 239                         if (dataTable == null)
 240                                 throw new ArgumentNullException ("DataTable");
 241
 242                         return Fill (dataTable, ((IDbDataAdapter) this).SelectCommand, _behavior);
 243                 }
 244
 245                 public int Fill (DataSet dataSet, string srcTable)
 246                 {
 247                         return Fill (dataSet, 0, 0, srcTable, ((IDbDataAdapter) this).SelectCommand, _behavior);
 248                 }
 249
 250
 251                 protected virtual int Fill (DataTable dataTable, IDbCommand command, CommandBehavior behavior)
 252                 {
 253                         CommandBehavior commandBehavior = behavior;
 254
 255                         // first see that the connection is not close.
 256                         if (command.Connection.State == ConnectionState.Closed) {
 257                                 command.Connection.Open ();
 258                                 commandBehavior |= CommandBehavior.CloseConnection;
 259                         }
 260                         return Fill (dataTable, command.ExecuteReader (commandBehavior));
 261                 }
 262
 263                 public int Fill (DataSet dataSet, int startRecord, int maxRecords, string srcTable)
 264                 {
 265                         return this.Fill (dataSet, startRecord, maxRecords, srcTable, ((IDbDataAdapter) this).SelectCommand, _behavior);
 266                 }
 267
 268                 [MonoTODO]
 269                 public int Fill (int startRecord, int maxRecords, params DataTable[] dataTables)
 270                 {
 271                         throw new NotImplementedException ();
 272                 }
 273
 274                 [MonoTODO]
 275                 protected virtual int Fill (DataTable[] dataTables, int startRecord, int maxRecords, IDbCommand command, CommandBehavior behavior)
 276                 {
 277                         throw new NotImplementedException ();
 278                 }
 279
 280                 protected virtual int Fill (DataSet dataSet, int startRecord, int maxRecords, string srcTable, IDbCommand command, CommandBehavior behavior)
 281                 {
 282                         if (command.Connection == null)
 283                                 throw new InvalidOperationException ("Connection state is closed");
 284
 285                         if (MissingSchemaAction == MissingSchemaAction.AddWithKey)
 286                                 behavior |= CommandBehavior.KeyInfo;
 287                         CommandBehavior commandBehavior = behavior;
 288
 289                         if (command.Connection.State == ConnectionState.Closed) {
 290                                 command.Connection.Open ();
 291                                 commandBehavior |= CommandBehavior.CloseConnection;
 292                         }
 293                         return Fill (dataSet, srcTable, command.ExecuteReader (commandBehavior),
 294                                 startRecord, maxRecords);
 295                 }
 296
 297                 /// <summary>
 298                 /// Fills the given datatable using values from reader. if a value
 299                 /// for a column is  null, that will be filled with default value.
 300                 /// </summary>
 301                 /// <returns>No. of rows affected </returns>
 302                 internal static int FillFromReader (DataTable table,
 303                                                     IDataReader reader,
 304                                                     int start,
 305                                                     int length,
 306                                                     int [] mapping,
 307                                                     LoadOption loadOption
 308                                                     )
 309                 {
 310                         if (reader.FieldCount == 0)
 311                                 return 0 ;
 312
 313                         for (int i = 0; i < start; i++)
 314                                 reader.Read ();
 315
 316                         int counter = 0;
 317                         object [] values = new object [mapping.Length];
 318                         while (reader.Read () && (length == 0 || counter < length)) {
 319                                 for (int i = 0 ; i < mapping.Length; i++)
 320                                         values [i] = mapping [i] < 0 ? null : reader [mapping [i]];
 321                                 table.BeginLoadData ();
 322                                 table.LoadDataRow (values, loadOption);
 323                                 table.EndLoadData ();
 324                                 counter++;
 325                         }
 326                         return counter;
 327                 }
 328
 329                 internal static int FillFromReader (DataTable table,
 330                                                     IDataReader reader,
 331                                                     int start,
 332                                                     int length,
 333                                                     int [] mapping,
 334                                                     LoadOption loadOption,
 335                                                     FillErrorEventHandler errorHandler)
 336                 {
 337                         if (reader.FieldCount == 0)
 338                                 return 0 ;
 339
 340                         for (int i = 0; i < start; i++)
 341                                 reader.Read ();
 342
 343                         int counter = 0;
 344                         object [] values = new object [mapping.Length];
 345                         while (reader.Read () && (length == 0 || counter < length)) {
 346                                 for (int i = 0 ; i < mapping.Length; i++)
 347                                         values [i] = mapping [i] < 0 ? null : reader [mapping [i]];
 348                                 table.BeginLoadData ();
 349                                 try {
 350                                         table.LoadDataRow (values, loadOption);
 351                                 } catch (Exception e) {
 352                                         FillErrorEventArgs args = new FillErrorEventArgs (table, values);
 353                                         args.Errors = e;
 354                                         args.Continue = false;
 355                                         errorHandler (table, args);
 356                                         // if args.Continue is not set to true or if a handler is not set, rethrow the error..
 357                                         if(!args.Continue)
 358                                                 throw e;
 359                                 }
 360                                 table.EndLoadData ();
 361                                 counter++;
 362                         }
 363                         return counter;
 364                 }
 365
 366                 public override DataTable [] FillSchema (DataSet dataSet, SchemaType schemaType)
 367                 {
 368                         return FillSchema (dataSet, schemaType, ((IDbDataAdapter) this).SelectCommand, DefaultSourceTableName, _behavior);
 369                 }
 370
 371                 public DataTable FillSchema (DataTable dataTable, SchemaType schemaType)
 372                 {
 373                         return FillSchema (dataTable, schemaType, ((IDbDataAdapter) this).SelectCommand, _behavior);
 374                 }
 375
 376                 public DataTable [] FillSchema (DataSet dataSet, SchemaType schemaType, string srcTable)
 377                 {
 378                         return FillSchema (dataSet, schemaType, ((IDbDataAdapter) this).SelectCommand, srcTable, _behavior);
 379                 }
 380
 381                 protected virtual DataTable FillSchema (DataTable dataTable, SchemaType schemaType, IDbCommand command, CommandBehavior behavior)
 382                 {
 383                         if (dataTable == null)
 384                                 throw new ArgumentNullException ("DataTable");
 385
 386                         behavior |= CommandBehavior.SchemaOnly | CommandBehavior.KeyInfo;
 387                         if (command.Connection.State == ConnectionState.Closed) {
 388                                 command.Connection.Open ();
 389                                 behavior |= CommandBehavior.CloseConnection;
 390                         }
 391
 392                         IDataReader reader = command.ExecuteReader (behavior);
 393                         try {
 394                                 string tableName =  SetupSchema (schemaType, dataTable.TableName);
 395                                 if (tableName != null) {
 396                                         // FillSchema should add the KeyInfo unless MissingSchemaAction
 397                                         // is set to Ignore or Error.
 398                                         MissingSchemaAction schemaAction = MissingSchemaAction;
 399                                         if (!(schemaAction == MissingSchemaAction.Ignore ||
 400                                                 schemaAction == MissingSchemaAction.Error))
 401                                                 schemaAction = MissingSchemaAction.AddWithKey;
 402
 403                                         BuildSchema (reader, dataTable, schemaType, schemaAction,
 404                                                 MissingMappingAction, TableMappings);
 405                                 }
 406                         } finally {
 407                                 reader.Close ();
 408                         }
 409                         return dataTable;
 410                 }
 411
 412                 protected virtual DataTable[] FillSchema (DataSet dataSet, SchemaType schemaType, IDbCommand command, string srcTable, CommandBehavior behavior)
 413                 {
 414                         if (dataSet == null)
 415                                 throw new ArgumentNullException ("DataSet");
 416
 417                         behavior |= CommandBehavior.SchemaOnly | CommandBehavior.KeyInfo;
 418                         if (command.Connection.State == ConnectionState.Closed) {
 419                                 command.Connection.Open ();
 420                                 behavior |= CommandBehavior.CloseConnection;
 421                         }
 422
 423                         IDataReader reader = command.ExecuteReader (behavior);
 424                         ArrayList output = new ArrayList ();
 425                         string tableName = srcTable;
 426                         int index = 0;
 427                         DataTable table;
 428                         try {
 429                                 // FillSchema should add the KeyInfo unless MissingSchemaAction
 430                                 // is set to Ignore or Error.
 431                                 MissingSchemaAction schemaAction = MissingSchemaAction;
 432                                 if (!(MissingSchemaAction == MissingSchemaAction.Ignore ||
 433                                         MissingSchemaAction == MissingSchemaAction.Error))
 434                                         schemaAction = MissingSchemaAction.AddWithKey;
 435
 436                                 do {
 437                                         tableName = SetupSchema (schemaType, tableName);
 438                                         if (tableName != null) {
 439                                                 if (dataSet.Tables.Contains (tableName))
 440                                                         table = dataSet.Tables [tableName];
 441                                                 else {
 442                                                         // Do not create schema if MissingSchemAction is set to Ignore
 443                                                         if (this.MissingSchemaAction == MissingSchemaAction.Ignore)
 444                                                                 continue;
 445                                                         table =  dataSet.Tables.Add (tableName);
 446                                                 }
 447
 448                                                 BuildSchema (reader, table, schemaType, schemaAction,
 449                                                         MissingMappingAction, TableMappings);
 450                                                 output.Add (table);
 451                                                 tableName = String.Format ("{0}{1}", srcTable, ++index);
 452                                         }
 453                                 }while (reader.NextResult ());
 454                         } finally {
 455                                 reader.Close ();
 456                         }
 457                         return (DataTable []) output.ToArray (typeof (DataTable));
 458                 }
 459
 460                 [EditorBrowsable (EditorBrowsableState.Advanced)]
 461                 public override IDataParameter[] GetFillParameters ()
 462                 {
 463                         IDbCommand selectCmd = ((IDbDataAdapter) this).SelectCommand;
 464                         IDataParameter[] parameters = new IDataParameter [selectCmd.Parameters.Count];
 465                         selectCmd.Parameters.CopyTo (parameters, 0);
 466                         return parameters;
 467                 }
 468
 469                 [MonoTODO]
 470                 [Obsolete ("use 'protected DbDataAdapter(DbDataAdapter)' ctor")]
 471                 object ICloneable.Clone ()
 472                 {
 473                         throw new NotImplementedException ();
 474                 }
 475
 476                 public int Update (DataRow [] dataRows)
 477                 {
 478                         if (dataRows == null)
 479                                 throw new ArgumentNullException("dataRows");
 480
 481                         if (dataRows.Length == 0)
 482                                 return 0;
 483
 484                         if (dataRows [0] == null)
 485                                 throw new ArgumentException("dataRows[0].");
 486
 487                         DataTable table = dataRows [0].Table;
 488                         if (table == null)
 489                                 throw new ArgumentException("table is null reference.");
 490
 491                         // all rows must be in the same table
 492                         for (int i = 0; i < dataRows.Length; i++) {
 493                                 if (dataRows [i] == null)
 494                                         throw new ArgumentException ("dataRows[" + i + "].");
 495                                 if (dataRows [i].Table != table)
 496                                         throw new ArgumentException(
 497                                                                     " DataRow["
 498                                                                     + i
 499                                                                     + "] is from a different DataTable than DataRow[0].");
 500                         }
 501
 502                         // get table mapping for this rows
 503                         DataTableMapping tableMapping = TableMappings.GetByDataSetTable(table.TableName);
 504                         if (tableMapping == null) {
 505                                 tableMapping = DataTableMappingCollection.GetTableMappingBySchemaAction(
 506                                                                                                         TableMappings,
 507                                                                                                         table.TableName,
 508                                                                                                         table.TableName,
 509                                                                                                         MissingMappingAction);
 510                                 if (tableMapping != null) {
 511                                         foreach (DataColumn col in table.Columns) {
 512                                                 if (tableMapping.ColumnMappings.IndexOf (col.ColumnName) >= 0)
 513                                                         continue;
 514                                                 DataColumnMapping columnMapping = DataColumnMappingCollection.GetColumnMappingBySchemaAction (tableMapping.ColumnMappings, col.ColumnName, MissingMappingAction);
 515                                                 if (columnMapping == null)
 516                                                         columnMapping = new DataColumnMapping (col.ColumnName, col.ColumnName);
 517                                                 tableMapping.ColumnMappings.Add (columnMapping);
 518                                         }
 519                                 } else {
 520                                         ArrayList cmc = new ArrayList ();
 521                                         foreach (DataColumn col in table.Columns)
 522                                                 cmc.Add (new DataColumnMapping (col.ColumnName, col.ColumnName));
 523                                         tableMapping =
 524                                                 new DataTableMapping (
 525                                                                       table.TableName,
 526                                                                       table.TableName,
 527                                                                       cmc.ToArray (typeof (DataColumnMapping)) as DataColumnMapping []);
 528                                 }
 529                         }
 530
 531                         DataRow[] copy = table.NewRowArray (dataRows.Length);
 532                         Array.Copy (dataRows, 0, copy, 0, dataRows.Length);
 533                         return Update (copy, tableMapping);
 534                 }
 535
 536                 public override int Update (DataSet dataSet)
 537                 {
 538                         return Update (dataSet, DefaultSourceTableName);
 539                 }
 540
 541                 public int Update (DataTable dataTable)
 542                 {
 543                         /*
 544                           int index = TableMappings.IndexOfDataSetTable (dataTable.TableName);
 545                           if (index < 0)
 546                           throw new ArgumentException ();
 547                           return Update (dataTable, TableMappings [index]);
 548                         */
 549                         DataTableMapping tableMapping = TableMappings.GetByDataSetTable (dataTable.TableName);
 550                         if (tableMapping == null) {
 551                                 tableMapping = DataTableMappingCollection.GetTableMappingBySchemaAction (
 552                                                                                                          TableMappings,
 553                                                                                                          dataTable.TableName,
 554                                                                                                          dataTable.TableName,
 555                                                                                                          MissingMappingAction);
 556                                 if (tableMapping != null) {
 557                                         foreach (DataColumn col in dataTable.Columns) {
 558                                                 if (tableMapping.ColumnMappings.IndexOf (col.ColumnName) >= 0)
 559                                                         continue;
 560                                                 DataColumnMapping columnMapping = DataColumnMappingCollection.GetColumnMappingBySchemaAction (tableMapping.ColumnMappings, col.ColumnName, MissingMappingAction);
 561                                                 if (columnMapping == null)
 562                                                         columnMapping = new DataColumnMapping (col.ColumnName, col.ColumnName);
 563                                                 tableMapping.ColumnMappings.Add (columnMapping);
 564                                         }
 565                                 } else {
 566                                         ArrayList cmc = new ArrayList ();
 567                                         foreach (DataColumn col in dataTable.Columns)
 568                                                 cmc.Add (new DataColumnMapping (col.ColumnName, col.ColumnName));
 569                                         tableMapping =
 570                                                 new DataTableMapping (
 571                                                                       dataTable.TableName,
 572                                                                       dataTable.TableName,
 573                                                                       cmc.ToArray (typeof (DataColumnMapping)) as DataColumnMapping []);
 574                                 }
 575                         }
 576                         return Update (dataTable, tableMapping);
 577                 }
 578
 579                 private int Update (DataTable dataTable, DataTableMapping tableMapping)
 580                 {
 581                         DataRow [] rows = dataTable.NewRowArray(dataTable.Rows.Count);
 582                         dataTable.Rows.CopyTo (rows, 0);
 583                         return Update (rows, tableMapping);
 584                 }
 585
 586                 protected virtual int Update (DataRow [] dataRows, DataTableMapping tableMapping)
 587                 {
 588                         int updateCount = 0;
 589                         foreach (DataRow row in dataRows) {
 590                                 StatementType statementType = StatementType.Update;
 591                                 IDbCommand command = null;
 592                                 string commandName = String.Empty;
 593
 594                                 switch (row.RowState) {
 595                                 case DataRowState.Added:
 596                                         statementType = StatementType.Insert;
 597                                         command = ((IDbDataAdapter) this).InsertCommand;
 598                                         commandName = "Insert";
 599                                         break;
 600                                 case DataRowState.Deleted:
 601                                         statementType = StatementType.Delete;
 602                                         command = ((IDbDataAdapter) this).DeleteCommand;
 603                                         commandName = "Delete";
 604                                         break;
 605                                 case DataRowState.Modified:
 606                                         statementType = StatementType.Update;
 607                                         command = ((IDbDataAdapter) this).UpdateCommand;
 608                                         commandName = "Update";
 609                                         break;
 610                                 case DataRowState.Unchanged:
 611                                 case DataRowState.Detached:
 612                                         continue;
 613                                 }
 614
 615                                 RowUpdatingEventArgs argsUpdating = CreateRowUpdatingEvent (row, command, statementType, tableMapping);
 616                                 row.RowError = String.Empty;
 617                                 OnRowUpdating (argsUpdating);
 618                                 switch (argsUpdating.Status) {
 619                                 case UpdateStatus.Continue :
 620                                         //continue in update operation
 621                                         break;
 622                                 case UpdateStatus.ErrorsOccurred :
 623                                         if (argsUpdating.Errors == null)
 624                                                 argsUpdating.Errors = ExceptionHelper.RowUpdatedError();
 625                                         row.RowError += argsUpdating.Errors.Message;
 626                                         if (!ContinueUpdateOnError)
 627                                                 throw argsUpdating.Errors;
 628                                         continue;
 629                                 case UpdateStatus.SkipAllRemainingRows :
 630                                         return updateCount;
 631                                 case UpdateStatus.SkipCurrentRow :
 632                                         updateCount++;
 633                                         continue;
 634                                 default :
 635                                         throw ExceptionHelper.InvalidUpdateStatus (argsUpdating.Status);
 636                                 }
 637                                 command = argsUpdating.Command;
 638                                 try {
 639                                         if (command != null) {
 640                                                 DataColumnMappingCollection columnMappings = tableMapping.ColumnMappings;
 641                                                 foreach (IDataParameter parameter in command.Parameters) {
 642                                                         if ((parameter.Direction & ParameterDirection.Input) == 0)
 643                                                                 continue;
 644
 645                                                         DataRowVersion rowVersion = parameter.SourceVersion;
 646                                                         // Parameter version is ignored for non-update commands
 647                                                         if (statementType == StatementType.Delete)
 648                                                                 rowVersion = DataRowVersion.Original;
 649
 650                                                         string dsColumnName = parameter.SourceColumn;
 651                                                         if (columnMappings.Contains(dsColumnName)) {
 652                                                                 dsColumnName = columnMappings [dsColumnName].DataSetColumn;
 653                                                                 parameter.Value = row [dsColumnName, rowVersion];
 654                                                         } else {
 655                                                                 parameter.Value = null;
 656                                                         }
 657
 658                                                         DbParameter nullCheckParam = parameter as DbParameter;
 659
 660                                                         if (nullCheckParam != null && nullCheckParam.SourceColumnNullMapping) {
 661                                                                 if (parameter.Value != null && parameter.Value != DBNull.Value)
 662                                                                         nullCheckParam.Value = 0;
 663                                                                 else
 664                                                                         nullCheckParam.Value = 1;
 665                                                                 nullCheckParam = null;
 666                                                         }
 667                                                 }
 668                                         }
 669                                 } catch (Exception e) {
 670                                         argsUpdating.Errors = e;
 671                                         argsUpdating.Status = UpdateStatus.ErrorsOccurred;
 672                                 }
 673
 674                                 IDataReader reader = null;
 675                                 try {
 676                                         if (command == null)
 677                                                 throw ExceptionHelper.UpdateRequiresCommand (commandName);
 678
 679                                         CommandBehavior commandBehavior = CommandBehavior.Default;
 680                                         if (command.Connection.State == ConnectionState.Closed) {
 681                                                 command.Connection.Open ();
 682                                                 commandBehavior |= CommandBehavior.CloseConnection;
 683                                         }
 684
 685                                         // use ExecuteReader because we want to use the commandbehavior parameter.
 686                                         // so the connection will be closed if needed.
 687                                         reader = command.ExecuteReader (commandBehavior);
 688
 689                                         // update the current row, if the update command returns any resultset
 690                                         // ignore other than the first record.
 691                                         DataColumnMappingCollection columnMappings = tableMapping.ColumnMappings;
 692
 693                                         if (command.UpdatedRowSource == UpdateRowSource.Both ||
 694                                             command.UpdatedRowSource == UpdateRowSource.FirstReturnedRecord) {
 695                                                 if (reader.Read ()){
 696                                                         DataTable retSchema = reader.GetSchemaTable ();
 697                                                         foreach (DataRow dr in retSchema.Rows) {
 698                                                                 string columnName = dr ["ColumnName"].ToString ();
 699                                                                 string dstColumnName = columnName;
 700                                                                 if (columnMappings != null &&
 701                                                                     columnMappings.Contains(columnName))
 702                                                                         dstColumnName = columnMappings [dstColumnName].DataSetColumn;
 703                                                                 DataColumn dstColumn = row.Table.Columns [dstColumnName];
 704                                                                 if (dstColumn == null
 705                                                                     || (dstColumn.Expression != null
 706                                                                         && dstColumn.Expression.Length > 0))
 707                                                                         continue;
 708                                                                 // info from : http://www.error-bank.com/microsoft.public.dotnet.framework.windowsforms.databinding/
 709                                                                 // _35_hcsyiv0dha.2328@tk2msftngp10.phx.gbl_Thread.aspx
 710                                                                 // disable readonly for non-expression columns.
 711                                                                 bool readOnlyState = dstColumn.ReadOnly;
 712                                                                 dstColumn.ReadOnly = false;
 713                                                                 try {
 714                                                                         row [dstColumnName] = reader [columnName];
 715                                                                 } finally {
 716                                                                         dstColumn.ReadOnly = readOnlyState;
 717                                                                 }
 718                                                         }
 719                                                 }
 720                                         }
 721                                         reader.Close ();
 722
 723                                         int tmp = reader.RecordsAffected; // records affected is valid only after closing reader
 724                                         // if the execute does not effect any rows we throw an exception.
 725                                         if (tmp == 0)
 726                                                 throw new DBConcurrencyException("Concurrency violation: the " +
 727                                                         commandName +"Command affected 0 records.", null,
 728                                                         new DataRow [] { row });
 729                                         updateCount += tmp;
 730
 731                                         if (command.UpdatedRowSource == UpdateRowSource.Both ||
 732                                             command.UpdatedRowSource == UpdateRowSource.OutputParameters) {
 733                                                 // Update output parameters to row values
 734                                                 foreach (IDataParameter parameter in command.Parameters) {
 735                                                         if (parameter.Direction != ParameterDirection.InputOutput
 736                                                             && parameter.Direction != ParameterDirection.Output
 737                                                             && parameter.Direction != ParameterDirection.ReturnValue)
 738                                                                 continue;
 739
 740                                                         string dsColumnName = parameter.SourceColumn;
 741                                                         if (columnMappings != null &&
 742                                                             columnMappings.Contains(parameter.SourceColumn))
 743                                                                 dsColumnName = columnMappings [parameter.SourceColumn].DataSetColumn;
 744                                                         DataColumn dstColumn = row.Table.Columns [dsColumnName];
 745                                                         if (dstColumn == null
 746                                                             || (dstColumn.Expression != null
 747                                                                 && dstColumn.Expression.Length > 0))
 748                                                                 continue;
 749                                                         bool readOnlyState = dstColumn.ReadOnly;
 750                                                         dstColumn.ReadOnly  = false;
 751                                                         try {
 752                                                                 row [dsColumnName] = parameter.Value;
 753                                                         } finally {
 754                                                                 dstColumn.ReadOnly = readOnlyState;
 755                                                         }
 756                                                 }
 757                                         }
 758
 759                                         RowUpdatedEventArgs updatedArgs = CreateRowUpdatedEvent (row, command, statementType, tableMapping);
 760                                         OnRowUpdated (updatedArgs);
 761                                         switch (updatedArgs.Status) {
 762                                         case UpdateStatus.Continue:
 763                                                 break;
 764                                         case UpdateStatus.ErrorsOccurred:
 765                                                 if (updatedArgs.Errors == null)
 766                                                         updatedArgs.Errors = ExceptionHelper.RowUpdatedError();
 767                                                 row.RowError += updatedArgs.Errors.Message;
 768                                                 if (!ContinueUpdateOnError)
 769                                                         throw updatedArgs.Errors;
 770                                                 break;
 771                                         case UpdateStatus.SkipCurrentRow:
 772                                                 continue;
 773                                         case UpdateStatus.SkipAllRemainingRows:
 774                                                 return updateCount;
 775                                         }
 776                                         if (!AcceptChangesDuringUpdate)
 777                                                 continue;
 778                                         row.AcceptChanges ();
 779                                 } catch (Exception e) {
 780                                         row.RowError = e.Message;
 781                                         if (!ContinueUpdateOnError)
 782                                                 throw e;
 783                                 } finally {
 784                                         if (reader != null && ! reader.IsClosed)
 785                                                 reader.Close ();
 786                                 }
 787                         }
 788                         return updateCount;
 789                 }
 790
 791                 public int Update (DataSet dataSet, string srcTable)
 792                 {
 793                         MissingMappingAction mappingAction = MissingMappingAction;
 794
 795                         if (mappingAction == MissingMappingAction.Ignore)
 796                                 mappingAction = MissingMappingAction.Error;
 797
 798                         DataTableMapping tableMapping = DataTableMappingCollection.GetTableMappingBySchemaAction (TableMappings, srcTable, srcTable, mappingAction);
 799
 800                         DataTable dataTable = dataSet.Tables [tableMapping.DataSetTable];
 801                         if (dataTable == null)
 802                                 throw new ArgumentException (String.Format ("Missing table {0}",
 803                                                                             srcTable));
 804
 805                         /** Copied from another Update function **/
 806                         if (tableMapping != null) {
 807                                 foreach (DataColumn col in dataTable.Columns) {
 808                                         if (tableMapping.ColumnMappings.IndexOf (col.ColumnName) >= 0)
 809                                                 continue;
 810                                         DataColumnMapping columnMapping = DataColumnMappingCollection.GetColumnMappingBySchemaAction (tableMapping.ColumnMappings, col.ColumnName, MissingMappingAction);
 811                                         if (columnMapping == null)
 812                                                 columnMapping = new DataColumnMapping (col.ColumnName, col.ColumnName);
 813                                         tableMapping.ColumnMappings.Add (columnMapping);
 814                                 }
 815                         } else {
 816                                 ArrayList cmc = new ArrayList ();
 817                                 foreach (DataColumn col in dataTable.Columns)
 818                                         cmc.Add (new DataColumnMapping (col.ColumnName, col.ColumnName));
 819                                 tableMapping =
 820                                         new DataTableMapping (
 821                                                               dataTable.TableName,
 822                                                               dataTable.TableName,
 823                                                               cmc.ToArray (typeof (DataColumnMapping)) as DataColumnMapping []);
 824                         }
 825                         /**end insert from another update**/
 826                         return Update (dataTable, tableMapping);
 827                 }
 828
 829                 // All the batch methods, should be implemented, if supported,
 830                 // by individual providers
 831
 832                 protected virtual int AddToBatch (IDbCommand command)
 833                 {
 834                         throw CreateMethodNotSupportedException ();
 835                 }
 836
 837                 protected virtual void ClearBatch ()
 838                 {
 839                         throw CreateMethodNotSupportedException ();
 840                 }
 841
 842                 protected virtual int ExecuteBatch ()
 843                 {
 844                         throw CreateMethodNotSupportedException ();
 845                 }
 846
 847                 protected virtual IDataParameter GetBatchedParameter (int commandIdentifier, int parameterIndex)
 848                 {
 849                         throw CreateMethodNotSupportedException ();
 850                 }
 851
 852                 protected virtual bool GetBatchedRecordsAffected (int commandIdentifier, out int recordsAffected, out Exception error)
 853                 {
 854                         recordsAffected = 1;
 855                         error = null;
 856                         return true;
 857                 }
 858
 859                 protected virtual void InitializeBatching ()
 860                 {
 861                         throw CreateMethodNotSupportedException ();
 862                 }
 863
 864                 protected virtual void TerminateBatching ()
 865                 {
 866                         throw CreateMethodNotSupportedException ();
 867                 }
 868
 869                 Exception CreateMethodNotSupportedException ()
 870                 {
 871                         return new NotSupportedException ("Method is not supported.");
 872                 }
 873                 #endregion // Methods
 874         }
 875 }