mcs/class/System.Data/System.Data.SqlClient/SqlBulkCopy.cs

   1 //
   2 // System.Data.SqlClient.SqlBulkCopy.cs
   3 //
   4 // Author:
   5 //   Nagappan A (anagappan@novell.com)
   6 //
   7 // (C) Novell, Inc 2007
   8
   9 //
  10 // Copyright (C) 2007 Novell, Inc (http://www.novell.com)
  11 //
  12 // Permission is hereby granted, free of charge, to any person obtaining
  13 // a copy of this software and associated documentation files (the
  14 // "Software"), to deal in the Software without restriction, including
  15 // without limitation the rights to use, copy, modify, merge, publish,
  16 // distribute, sublicense, and/or sell copies of the Software, and to
  17 // permit persons to whom the Software is furnished to do so, subject to
  18 // the following conditions:
  19 //
  20 // The above copyright notice and this permission notice shall be
  21 // included in all copies or substantial portions of the Software.
  22 //
  23 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  27 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  28 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  29 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  30 //
  31 #if NET_2_0
  32
  33 using System;
  34 using System.Data;
  35 using System.Data.Common;
  36 using Mono.Data.Tds;
  37 using Mono.Data.Tds.Protocol;
  38
  39 namespace System.Data.SqlClient {
  40         /// <summary>Efficient way to bulk load SQL Server table with several data rows at once</summary>
  41         public sealed class SqlBulkCopy : IDisposable
  42         {
  43                 #region Constants
  44                 private const string transConflictMessage = "Must not specify SqlBulkCopyOptions.UseInternalTransaction " +
  45                         "and pass an external Transaction at the same time.";
  46
  47                 private const SqlBulkCopyOptions insertModifiers =
  48                         SqlBulkCopyOptions.CheckConstraints | SqlBulkCopyOptions.TableLock |
  49                         SqlBulkCopyOptions.KeepNulls | SqlBulkCopyOptions.FireTriggers;
  50                 #endregion
  51
  52                 #region Fields
  53
  54                 private int _batchSize = 0;
  55                 private int _notifyAfter = 0;
  56                 private int _bulkCopyTimeout = 0;
  57                 private SqlBulkCopyColumnMappingCollection _columnMappingCollection = new SqlBulkCopyColumnMappingCollection ();
  58                 private string _destinationTableName = null;
  59                 private bool ordinalMapping = false;
  60                 private bool sqlRowsCopied = false;
  61                 private bool isLocalConnection = false;
  62                 private SqlConnection connection;
  63                 private SqlTransaction externalTransaction;
  64                 private SqlBulkCopyOptions copyOptions = SqlBulkCopyOptions.Default;
  65
  66                 #endregion
  67
  68                 #region Constructors
  69                 public SqlBulkCopy (SqlConnection connection)
  70                 {
  71                         if (connection == null) {
  72                                 throw new ArgumentNullException("connection");
  73                         }
  74
  75                         this.connection = connection;
  76                 }
  77
  78                 public SqlBulkCopy (string connectionString)
  79                 {
  80                         if (connectionString == null) {
  81                                 throw new ArgumentNullException("connectionString");
  82                         }
  83
  84                         this.connection = new SqlConnection (connectionString);
  85                         isLocalConnection = true;
  86                 }
  87
  88                 [MonoTODO]
  89                 public SqlBulkCopy (string connectionString, SqlBulkCopyOptions copyOptions)
  90                 {
  91                         if (connectionString == null) {
  92                                 throw new ArgumentNullException ("connectionString");
  93                         }
  94
  95                         this.connection = new SqlConnection (connectionString);
  96                         isLocalConnection = true;
  97
  98                         if ((copyOptions & SqlBulkCopyOptions.UseInternalTransaction) == SqlBulkCopyOptions.UseInternalTransaction)
  99                                 throw new NotImplementedException ("We don't know how to process UseInternalTransaction option.");
 100
 101                         this.copyOptions = copyOptions;
 102                 }
 103
 104                 [MonoTODO]
 105                 public SqlBulkCopy (SqlConnection connection, SqlBulkCopyOptions copyOptions, SqlTransaction externalTransaction)
 106                 {
 107                         if (connection == null) {
 108                                 throw new ArgumentNullException ("connection");
 109                         }
 110
 111                         this.connection = connection;
 112                         this.copyOptions = copyOptions;
 113
 114                         if ((copyOptions & SqlBulkCopyOptions.UseInternalTransaction) == SqlBulkCopyOptions.UseInternalTransaction) {
 115                                 if (externalTransaction != null)
 116                                         throw new ArgumentException (transConflictMessage);
 117                         }
 118                         else
 119                                 this.externalTransaction = externalTransaction;
 120
 121                         if ((copyOptions & SqlBulkCopyOptions.UseInternalTransaction) == SqlBulkCopyOptions.UseInternalTransaction)
 122                                 throw new NotImplementedException ("We don't know how to process UseInternalTransaction option.");
 123
 124                         this.copyOptions = copyOptions;
 125                 }
 126
 127                 #endregion
 128
 129                 #region Properties
 130
 131                 public int BatchSize {
 132                         get { return _batchSize; }
 133                         set { _batchSize = value; }
 134                 }
 135
 136                 public int BulkCopyTimeout {
 137                         get { return _bulkCopyTimeout; }
 138                         set { _bulkCopyTimeout = value; }
 139                 }
 140
 141                 public SqlBulkCopyColumnMappingCollection ColumnMappings  {
 142                         get { return _columnMappingCollection; }
 143                 }
 144
 145                 public string DestinationTableName {
 146                         get { return _destinationTableName; }
 147                         set { _destinationTableName = value; }
 148                 }
 149
 150                 public int NotifyAfter {
 151                         get { return _notifyAfter; }
 152                         set {
 153                                 if (value < 0)
 154                                         throw new ArgumentOutOfRangeException ("NotifyAfter should be greater than or equal to 0");
 155                                 _notifyAfter = value;
 156                         }
 157                 }
 158
 159                 #endregion
 160
 161                 #region Methods
 162
 163                 public void Close ()
 164                 {
 165                         if (sqlRowsCopied == true) {
 166                                 throw new InvalidOperationException ("Close should not be called from SqlRowsCopied event");
 167                         }
 168                         if (connection == null || connection.State == ConnectionState.Closed) {
 169                                 return;
 170                         }
 171                         connection.Close ();
 172                 }
 173
 174                 private DataTable [] GetColumnMetaData ()
 175                 {
 176                         DataTable [] columnMetaDataTables = new DataTable [2];
 177                         SqlCommand cmd = new SqlCommand ("select @@trancount; " +
 178                                                          "set fmtonly on select * from " +
 179                                                          DestinationTableName + " set fmtonly off;" +
 180                                                          "exec sp_tablecollations_90 '" +
 181                                                          DestinationTableName + "'",
 182                                                          connection);
 183                         SqlDataReader reader = cmd.ExecuteReader ();
 184                         int i = 0; // Skipping 1st result
 185                         do {
 186                                   if (i == 1) {
 187                                         columnMetaDataTables [i - 1] = reader.GetSchemaTable ();
 188                                   } else if (i == 2) {
 189                                         SqlDataAdapter adapter = new SqlDataAdapter ();
 190                                         adapter.MissingSchemaAction = MissingSchemaAction.AddWithKey;
 191                                         columnMetaDataTables [i - 1] = new DataTable ();
 192                                         adapter.FillInternal (columnMetaDataTables [i - 1], reader);
 193                                 }
 194                                 i++;
 195                         } while (reader.IsClosed == false && reader.NextResult());
 196                         reader.Close ();
 197                         return columnMetaDataTables;
 198                 }
 199
 200                 private string GenerateColumnMetaData (SqlCommand tmpCmd, DataTable colMetaData, DataTable tableCollations)
 201                 {
 202                         bool flag = false;
 203                         string statement = "";
 204                         int i = 0;
 205                         foreach (DataRow row in colMetaData.Rows) {
 206                                 flag = false;
 207                                 foreach (DataColumn col in colMetaData.Columns) { // FIXME: This line not required, remove later
 208                                         object value = null;
 209                                         if (_columnMappingCollection.Count > 0) {
 210                                                 if (ordinalMapping) {
 211                                                         foreach (SqlBulkCopyColumnMapping mapping
 212                                                                  in _columnMappingCollection) {
 213                                                                 if (mapping.DestinationOrdinal == i) {
 214                                                                         flag = true;
 215                                                                         break;
 216                                                                 }
 217                                                         }
 218                                                 } else {
 219                                                         foreach (SqlBulkCopyColumnMapping mapping
 220                                                                  in _columnMappingCollection) {
 221                                                                 if (mapping.DestinationColumn == (string) row ["ColumnName"]) {
 222                                                                         flag = true;
 223                                                                         break;
 224                                                                 }
 225                                                         }
 226                                                 }
 227                                                 if (flag == false)
 228                                                         break;
 229                                         }
 230                                         if ((bool)row ["IsReadOnly"]) {
 231                                                 if (ordinalMapping)
 232                                                         value = false;
 233                                                 else
 234                                                         break;
 235                                         }
 236                                         SqlParameter param = new SqlParameter ((string) row ["ColumnName"],
 237                                                                                ((SqlDbType) row ["ProviderType"]));
 238                                         param.Value = value;
 239                                         if ((int)row ["ColumnSize"] != -1) {
 240                                                 param.Size = (int) row ["ColumnSize"];
 241                                         }
 242
 243                                         short numericPresision = (short)row ["NumericPrecision"];
 244                                         if (numericPresision != 255) {
 245                                                 param.Precision = (byte) numericPresision;
 246                                         }
 247
 248                                         short numericScale = (short)row ["NumericScale"];
 249                                         if (numericScale != 255) {
 250                                                 param.Scale = (byte) numericScale;
 251                                         }
 252
 253                                         param.IsNullable = (bool)row ["AllowDBNull"];
 254                                         tmpCmd.Parameters.Add (param);
 255                                         break;
 256                                 }
 257                                 i++;
 258                         }
 259                         flag = false;
 260                         bool insertSt = false;
 261                         foreach (DataRow row in colMetaData.Rows) {
 262                                 SqlDbType sqlType = (SqlDbType) row ["ProviderType"];
 263                                 if (_columnMappingCollection.Count > 0) {
 264                                         i = 0;
 265                                         insertSt = false;
 266                                         foreach (SqlParameter param in tmpCmd.Parameters) {
 267                                                 if (ordinalMapping) {
 268                                                         foreach (SqlBulkCopyColumnMapping mapping
 269                                                                  in _columnMappingCollection) {
 270                                                                 if (mapping.DestinationOrdinal == i && param.Value == null) {
 271                                                                         insertSt = true;
 272                                                                 }
 273                                                         }
 274                                                 } else {
 275                                                         foreach (SqlBulkCopyColumnMapping mapping
 276                                                                  in _columnMappingCollection) {
 277                                                                 if (mapping.DestinationColumn == param.ParameterName &&
 278                                                                     (string)row ["ColumnName"] == param.ParameterName) {
 279                                                                         insertSt = true;
 280                                                                         param.Value = null;
 281                                                                 }
 282                                                         }
 283                                                 }
 284                                                 i++;
 285                                                 if (insertSt == true)
 286                                                         break;
 287                                         }
 288                                         if (insertSt == false)
 289                                                 continue;
 290                                 }
 291                                 if ((bool)row ["IsReadOnly"]) {
 292                                         continue;
 293                                 }
 294
 295                                 int columnSize = (int)row ["ColumnSize"];
 296                                 string columnInfo = "";
 297
 298                                 if (columnSize >= TdsMetaParameter.maxVarCharCharacters && sqlType == SqlDbType.Text)
 299                                         columnInfo = "VarChar(max)";
 300                                 else if (columnSize >= TdsMetaParameter.maxNVarCharCharacters && sqlType == SqlDbType.NText)
 301                                         columnInfo = "NVarChar(max)";
 302                                 else if (IsTextType(sqlType) && columnSize != -1) {
 303                                         columnInfo = string.Format ("{0}({1})",
 304                                                 sqlType,
 305                                                 columnSize.ToString());
 306                                 } else {
 307                                         columnInfo = string.Format ("{0}", sqlType);
 308                                 }
 309
 310                                 if ( sqlType == SqlDbType.Decimal)
 311                                         columnInfo += String.Format("({0},{1})", row ["NumericPrecision"], row ["NumericScale"]);
 312
 313                                 if (flag)
 314                                         statement += ", ";
 315                                 string columnName = (string) row ["ColumnName"];
 316                                 statement += string.Format ("[{0}] {1}", columnName, columnInfo);
 317                                 if (flag == false)
 318                                         flag = true;
 319                                 if (IsTextType(sqlType) && tableCollations != null) {
 320                                         foreach (DataRow collationRow in tableCollations.Rows) {
 321                                                 if ((string)collationRow ["name"] == columnName) {
 322                                                         statement += string.Format (" COLLATE {0}", collationRow ["collation"]);
 323                                                         break;
 324                                                 }
 325                                         }
 326                                 }
 327                         }
 328                         return statement;
 329                 }
 330
 331                 private void ValidateColumnMapping (DataTable table, DataTable tableCollations)
 332                 {
 333                         // So the problem here is that temp tables will not have any table collations.  This prevents
 334                         // us from bulk inserting into temp tables.  So for now we will skip the validation and
 335                         // let SqlServer tell us there is an issue rather than trying to do it here.
 336                         // So for now we will simply return and do nothing.
 337                         // TODO: At some point we should remove this function if we all agree its the right thing to do
 338                         return;
 339
 340 //                      foreach (SqlBulkCopyColumnMapping _columnMapping in _columnMappingCollection) {
 341 //                              if (ordinalMapping == false &&
 342 //                                  (_columnMapping.DestinationColumn == String.Empty ||
 343 //                                   _columnMapping.SourceColumn == String.Empty))
 344 //                                      throw new InvalidOperationException ("Mappings must be either all null or ordinal");
 345 //                              if (ordinalMapping &&
 346 //                                  (_columnMapping.DestinationOrdinal == -1 ||
 347 //                                   _columnMapping.SourceOrdinal == -1))
 348 //                                      throw new InvalidOperationException ("Mappings must be either all null or ordinal");
 349 //                              bool flag = false;
 350 //                              if (ordinalMapping == false) {
 351 //                                      foreach (DataRow row in tableCollations.Rows) {
 352 //                                              if ((string)row ["name"] == _columnMapping.DestinationColumn) {
 353 //                                                      flag = true;
 354 //                                                      break;
 355 //                                              }
 356 //                                      }
 357 //                                      if (flag == false)
 358 //                                              throw new InvalidOperationException ("ColumnMapping does not match");
 359 //                                      flag = false;
 360 //                                      foreach (DataColumn col in table.Columns) {
 361 //                                              if (col.ColumnName == _columnMapping.SourceColumn) {
 362 //                                                      flag = true;
 363 //                                                      break;
 364 //                                              }
 365 //                                      }
 366 //                                      if (flag == false)
 367 //                                              throw new InvalidOperationException ("ColumnName " +
 368 //                                                                                   _columnMapping.SourceColumn +
 369 //                                                                                   " does not match");
 370 //                              } else {
 371 //                                      if (_columnMapping.DestinationOrdinal >= tableCollations.Rows.Count)
 372 //                                              throw new InvalidOperationException ("ColumnMapping does not match");
 373 //                              }
 374 //                      }
 375                 }
 376
 377                 private void BulkCopyToServer (DataTable table, DataRowState state)
 378                 {
 379                         if (connection == null || connection.State == ConnectionState.Closed)
 380                                 throw new InvalidOperationException ("This method should not be called on a closed connection");
 381                         if (_destinationTableName == null)
 382                                 throw new ArgumentNullException ("DestinationTableName");
 383                         if (isLocalConnection && connection.State != ConnectionState.Open)
 384                                 connection.Open();
 385
 386                         if ((copyOptions & SqlBulkCopyOptions.KeepIdentity) == SqlBulkCopyOptions.KeepIdentity) {
 387                                 SqlCommand cmd = new SqlCommand ("set identity_insert " +
 388                                                                  table.TableName + " on",
 389                                                                  connection);
 390                                 cmd.ExecuteScalar ();
 391                         }
 392                         DataTable [] columnMetaDataTables = GetColumnMetaData ();
 393                         DataTable colMetaData = columnMetaDataTables [0];
 394                         DataTable tableCollations = columnMetaDataTables [1];
 395
 396                         if (_columnMappingCollection.Count > 0) {
 397                                 if (_columnMappingCollection [0].SourceOrdinal != -1)
 398                                         ordinalMapping = true;
 399                                 ValidateColumnMapping (table, tableCollations);
 400                         }
 401
 402                         SqlCommand tmpCmd = new SqlCommand ();
 403                         TdsBulkCopy blkCopy = new TdsBulkCopy ((Tds)connection.Tds);
 404                         if (((Tds)connection.Tds).TdsVersion >= TdsVersion.tds70) {
 405                                 string statement = "insert bulk " + DestinationTableName + " (";
 406                                 statement += GenerateColumnMetaData (tmpCmd, colMetaData, tableCollations);
 407                                 statement += ")";
 408
 409                                 #region Check requested options and add corresponding modifiers to the statement
 410                                 if ((copyOptions & insertModifiers) != SqlBulkCopyOptions.Default) {
 411                                         statement += " WITH (";
 412                                         bool commaRequired = false;
 413
 414                                         if ((copyOptions & SqlBulkCopyOptions.CheckConstraints) == SqlBulkCopyOptions.CheckConstraints) {
 415                                                 if (commaRequired)
 416                                                         statement += ", ";
 417                                                 statement += "CHECK_CONSTRAINTS";
 418                                                 commaRequired = true;
 419                                         }
 420
 421                                         if ((copyOptions & SqlBulkCopyOptions.TableLock) == SqlBulkCopyOptions.TableLock) {
 422                                                 if (commaRequired)
 423                                                         statement += ", ";
 424                                                 statement += "TABLOCK";
 425                                                 commaRequired = true;
 426                                         }
 427
 428                                         if ((copyOptions & SqlBulkCopyOptions.KeepNulls) == SqlBulkCopyOptions.KeepNulls) {
 429                                                 if (commaRequired)
 430                                                         statement += ", ";
 431                                                 statement += "KEEP_NULLS";
 432                                                 commaRequired = true;
 433                                         }
 434
 435                                         if ((copyOptions & SqlBulkCopyOptions.FireTriggers) == SqlBulkCopyOptions.FireTriggers) {
 436                                                 if (commaRequired)
 437                                                         statement += ", ";
 438                                                 statement += "FIRE_TRIGGERS";
 439                                                 commaRequired = true;
 440                                         }
 441
 442                                         statement += ")";
 443                                 }
 444                                 #endregion Check requested options and add corresponding modifiers to the statement
 445
 446                                 blkCopy.SendColumnMetaData (statement);
 447                         }
 448                         blkCopy.BulkCopyStart (tmpCmd.Parameters.MetaParameters);
 449                         long noRowsCopied = 0;
 450                         foreach (DataRow row in table.Rows) {
 451                                 if (row.RowState == DataRowState.Deleted)
 452                                         continue; // Don't copy the row that's in deleted state
 453                                 if (state != 0 && row.RowState != state)
 454                                         continue;
 455                                 bool isNewRow = true;
 456                                 int i = 0;
 457                                 foreach (SqlParameter param in tmpCmd.Parameters) {
 458                                         int size = 0;
 459                                         object rowToCopy = null;
 460                                         if (_columnMappingCollection.Count > 0) {
 461                                                 if (ordinalMapping) {
 462                                                         foreach (SqlBulkCopyColumnMapping mapping
 463                                                                  in _columnMappingCollection) {
 464                                                                 if (mapping.DestinationOrdinal == i && param.Value == null) {
 465                                                                         rowToCopy = row [mapping.SourceOrdinal];
 466                                                                         SqlParameter parameter = new SqlParameter (mapping.SourceOrdinal.ToString (),
 467                                                                                                                    rowToCopy);
 468                                                                         if (param.MetaParameter.TypeName != parameter.MetaParameter.TypeName) {
 469                                                                                 parameter.SqlDbType = param.SqlDbType;
 470                                                                                 rowToCopy = parameter.Value = parameter.ConvertToFrameworkType (rowToCopy);
 471                                                                         }
 472                                                                         string colType = string.Format ("{0}", parameter.MetaParameter.TypeName);
 473                                                                         if (colType == "nvarchar" || colType == "ntext" || colType == "nchar") {
 474                                                                                 if (row [i] != null && row [i] != DBNull.Value) {
 475                                                                                         size = ((string) parameter.Value).Length;
 476                                                                                         size <<= 1;
 477                                                                                 }
 478                                                                         } else if (colType == "varchar" || colType == "text" || colType == "char") {
 479                                                                                 if (row [i] != null && row [i] != DBNull.Value)
 480                                                                                         size = ((string) parameter.Value).Length;
 481                                                                         } else {
 482                                                                                 size = parameter.Size;
 483                                                                         }
 484                                                                         break;
 485                                                                 }
 486                                                         }
 487                                                 } else {
 488                                                         foreach (SqlBulkCopyColumnMapping mapping
 489                                                                  in _columnMappingCollection) {
 490                                                                 if (mapping.DestinationColumn == param.ParameterName) {
 491                                                                         rowToCopy = row [mapping.SourceColumn];
 492                                                                         SqlParameter parameter = new SqlParameter (mapping.SourceColumn, rowToCopy);
 493                                                                         if (param.MetaParameter.TypeName != parameter.MetaParameter.TypeName) {
 494                                                                                 parameter.SqlDbType = param.SqlDbType;
 495                                                                                 rowToCopy = parameter.Value = parameter.ConvertToFrameworkType (rowToCopy);
 496                                                                         }
 497                                                                         string colType = string.Format ("{0}", parameter.MetaParameter.TypeName);
 498                                                                         if (colType == "nvarchar" || colType == "ntext" || colType == "nchar") {
 499                                                                                 if (row [mapping.SourceColumn] != null && row [mapping.SourceColumn] != DBNull.Value) {
 500                                                                                         size = ((string) rowToCopy).Length;
 501                                                                                         size <<= 1;
 502                                                                                 }
 503                                                                         } else if (colType == "varchar" || colType == "text" || colType == "char") {
 504                                                                                 if (row [mapping.SourceColumn] != null && row [mapping.SourceColumn] != DBNull.Value)
 505                                                                                         size = ((string) rowToCopy).Length;
 506                                                                         } else {
 507                                                                                 size = parameter.Size;
 508                                                                         }
 509                                                                         break;
 510                                                                 }
 511                                                         }
 512                                                 }
 513                                                 i++;
 514                                         } else {
 515                                                 rowToCopy = row [param.ParameterName];
 516                                                 string colType = param.MetaParameter.TypeName;
 517                                                 /*
 518                                                   If column type is SqlDbType.NVarChar the size of parameter is multiplied by 2
 519                                                   FIXME: Need to check for other types
 520                                                 */
 521                                                 if (colType == "nvarchar" || colType == "ntext" || colType == "nchar") {
 522                                                         size = ((string) row [param.ParameterName]).Length;
 523                                                         size <<= 1;
 524                                                 } else if (colType == "varchar" || colType == "text" || colType == "char") {
 525                                                         size = ((string) row [param.ParameterName]).Length;
 526                                                 } else {
 527                                                         size = param.Size;
 528                                                 }
 529                                         }
 530                                         if (rowToCopy == null)
 531                                                 continue;
 532
 533                                         blkCopy.BulkCopyData (rowToCopy, isNewRow, size, param.MetaParameter);
 534
 535                                         if (isNewRow)
 536                                                 isNewRow = false;
 537                                 } // foreach (SqlParameter)
 538                                 if (_notifyAfter > 0) {
 539                                         noRowsCopied ++;
 540                                         if (noRowsCopied >= _notifyAfter) {
 541                                                 RowsCopied (noRowsCopied);
 542                                                 noRowsCopied = 0;
 543                                         }
 544                                 }
 545                         } // foreach (DataRow)
 546                         blkCopy.BulkCopyEnd ();
 547                 }
 548
 549                 private bool IsTextType(SqlDbType sqlType)
 550                 {
 551                         return (sqlType == SqlDbType.NText ||
 552                                 sqlType == SqlDbType.NVarChar ||
 553                                 sqlType == SqlDbType.Text ||
 554                                 sqlType == SqlDbType.VarChar ||
 555                                 sqlType == SqlDbType.Char ||
 556                                 sqlType == SqlDbType.NChar);
 557                 }
 558
 559                 public void WriteToServer (DataRow [] rows)
 560                 {
 561                         if (rows == null)
 562                                 throw new ArgumentNullException ("rows");
 563                         if (rows.Length == 0)
 564                                 return;
 565                         DataTable table = new DataTable (rows [0].Table.TableName);
 566                         foreach (DataColumn col in rows [0].Table.Columns) {
 567                                 DataColumn tmpCol = new DataColumn (col.ColumnName, col.DataType);
 568                                 table.Columns.Add (tmpCol);
 569                         }
 570                         foreach (DataRow row in rows) {
 571                                 DataRow tmpRow = table.NewRow ();
 572                                 for (int i = 0; i < table.Columns.Count; i++) {
 573                                         tmpRow [i] = row [i];
 574                                 }
 575                                 table.Rows.Add (tmpRow);
 576                         }
 577                         BulkCopyToServer (table, 0);
 578                 }
 579
 580                 public void WriteToServer (DataTable table)
 581                 {
 582                         BulkCopyToServer (table, 0);
 583                 }
 584
 585                 public void WriteToServer (IDataReader reader)
 586                 {
 587                         DataTable table = new DataTable ();
 588                         SqlDataAdapter adapter = new SqlDataAdapter ();
 589                         adapter.FillInternal (table, reader);
 590                         BulkCopyToServer (table, 0);
 591                 }
 592
 593                 public void WriteToServer (DataTable table, DataRowState rowState)
 594                 {
 595                         BulkCopyToServer (table, rowState);
 596                 }
 597
 598                 private void RowsCopied (long rowsCopied)
 599                 {
 600                         SqlRowsCopiedEventArgs e = new SqlRowsCopiedEventArgs (rowsCopied);
 601                         if (null != SqlRowsCopied) {
 602                                 SqlRowsCopied (this, e);
 603                         }
 604                 }
 605
 606                 #endregion
 607
 608                 #region Events
 609
 610                 public event SqlRowsCopiedEventHandler SqlRowsCopied;
 611
 612                 #endregion
 613
 614                 void IDisposable.Dispose ()
 615                 {
 616                         //throw new NotImplementedException ();
 617                         if (isLocalConnection) {
 618                                 Close ();
 619                                 connection = null;
 620                         }
 621                 }
 622
 623         }
 624 }
 625
 626 #endif