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
  32 using System;
  33 using System.Data;
  34 using System.Data.Common;
  35 using Mono.Data.Tds;
  36 using Mono.Data.Tds.Protocol;
  37
  38 namespace System.Data.SqlClient {
  39         /// <summary>Efficient way to bulk load SQL Server table with several data rows at once</summary>
  40         public sealed class SqlBulkCopy : IDisposable
  41         {
  42                 #region Constants
  43                 private const string transConflictMessage = "Must not specify SqlBulkCopyOptions.UseInternalTransaction " +
  44                         "and pass an external Transaction at the same time.";
  45
  46                 private const SqlBulkCopyOptions insertModifiers =
  47                         SqlBulkCopyOptions.CheckConstraints | SqlBulkCopyOptions.TableLock |
  48                         SqlBulkCopyOptions.KeepNulls | SqlBulkCopyOptions.FireTriggers;
  49                 #endregion
  50
  51                 #region Fields
  52
  53                 private int _batchSize = 0;
  54                 private int _notifyAfter = 0;
  55                 private int _bulkCopyTimeout = 0;
  56                 private SqlBulkCopyColumnMappingCollection _columnMappingCollection = new SqlBulkCopyColumnMappingCollection ();
  57                 private string _destinationTableName = null;
  58                 private bool ordinalMapping = false;
  59                 private bool sqlRowsCopied = false;
  60                 private bool isLocalConnection = false;
  61                 private SqlConnection connection;
  62                 private SqlTransaction externalTransaction;
  63                 private SqlBulkCopyOptions copyOptions = SqlBulkCopyOptions.Default;
  64
  65                 #endregion
  66
  67                 #region Constructors
  68                 public SqlBulkCopy (SqlConnection connection)
  69                 {
  70                         if (connection == null) {
  71                                 throw new ArgumentNullException("connection");
  72                         }
  73
  74                         this.connection = connection;
  75                 }
  76
  77                 public SqlBulkCopy (string connectionString)
  78                 {
  79                         if (connectionString == null) {
  80                                 throw new ArgumentNullException("connectionString");
  81                         }
  82
  83                         this.connection = new SqlConnection (connectionString);
  84                         isLocalConnection = true;
  85                 }
  86
  87                 [MonoTODO]
  88                 public SqlBulkCopy (string connectionString, SqlBulkCopyOptions copyOptions)
  89                 {
  90                         if (connectionString == null) {
  91                                 throw new ArgumentNullException ("connectionString");
  92                         }
  93
  94                         this.connection = new SqlConnection (connectionString);
  95                         isLocalConnection = true;
  96
  97                         if ((copyOptions & SqlBulkCopyOptions.UseInternalTransaction) == SqlBulkCopyOptions.UseInternalTransaction)
  98                                 throw new NotImplementedException ("We don't know how to process UseInternalTransaction option.");
  99
 100                         this.copyOptions = copyOptions;
 101                 }
 102
 103                 [MonoTODO]
 104                 public SqlBulkCopy (SqlConnection connection, SqlBulkCopyOptions copyOptions, SqlTransaction externalTransaction)
 105                 {
 106                         if (connection == null) {
 107                                 throw new ArgumentNullException ("connection");
 108                         }
 109
 110                         this.connection = connection;
 111                         this.copyOptions = copyOptions;
 112
 113                         if ((copyOptions & SqlBulkCopyOptions.UseInternalTransaction) == SqlBulkCopyOptions.UseInternalTransaction) {
 114                                 if (externalTransaction != null)
 115                                         throw new ArgumentException (transConflictMessage);
 116                         }
 117                         else
 118                                 this.externalTransaction = externalTransaction;
 119
 120                         if ((copyOptions & SqlBulkCopyOptions.UseInternalTransaction) == SqlBulkCopyOptions.UseInternalTransaction)
 121                                 throw new NotImplementedException ("We don't know how to process UseInternalTransaction option.");
 122
 123                         this.copyOptions = copyOptions;
 124                 }
 125
 126                 #endregion
 127
 128                 #region Properties
 129
 130                 public int BatchSize {
 131                         get { return _batchSize; }
 132                         set { _batchSize = value; }
 133                 }
 134
 135                 public int BulkCopyTimeout {
 136                         get { return _bulkCopyTimeout; }
 137                         set { _bulkCopyTimeout = value; }
 138                 }
 139
 140                 public SqlBulkCopyColumnMappingCollection ColumnMappings  {
 141                         get { return _columnMappingCollection; }
 142                 }
 143
 144                 public string DestinationTableName {
 145                         get { return _destinationTableName; }
 146                         set { _destinationTableName = value; }
 147                 }
 148
 149                 public int NotifyAfter {
 150                         get { return _notifyAfter; }
 151                         set {
 152                                 if (value < 0)
 153                                         throw new ArgumentOutOfRangeException ("NotifyAfter should be greater than or equal to 0");
 154                                 _notifyAfter = value;
 155                         }
 156                 }
 157
 158                 #endregion
 159
 160                 #region Methods
 161
 162                 public void Close ()
 163                 {
 164                         if (sqlRowsCopied == true) {
 165                                 throw new InvalidOperationException ("Close should not be called from SqlRowsCopied event");
 166                         }
 167                         if (connection == null || connection.State == ConnectionState.Closed) {
 168                                 return;
 169                         }
 170                         connection.Close ();
 171                 }
 172
 173                 private DataTable [] GetColumnMetaData ()
 174                 {
 175                         DataTable [] columnMetaDataTables = new DataTable [2];
 176                         SqlCommand cmd = new SqlCommand ("select @@trancount; " +
 177                                                          "set fmtonly on select * from " +
 178                                                          DestinationTableName + " set fmtonly off;" +
 179                                                          "exec sp_tablecollations_90 '" +
 180                                                          DestinationTableName + "'",
 181                                                          connection);
 182
 183                         if (externalTransaction != null)
 184                                 cmd.Transaction = externalTransaction;
 185
 186                         SqlDataReader reader = cmd.ExecuteReader ();
 187                         int i = 0; // Skipping 1st result
 188                         do {
 189                                   if (i == 1) {
 190                                         columnMetaDataTables [i - 1] = reader.GetSchemaTable ();
 191                                   } else if (i == 2) {
 192                                         SqlDataAdapter adapter = new SqlDataAdapter ();
 193                                         adapter.MissingSchemaAction = MissingSchemaAction.AddWithKey;
 194                                         columnMetaDataTables [i - 1] = new DataTable (DestinationTableName);
 195                                         adapter.FillInternal (columnMetaDataTables [i - 1], reader);
 196                                 }
 197                                 i++;
 198                         } while (reader.IsClosed == false && reader.NextResult());
 199                         reader.Close ();
 200                         return columnMetaDataTables;
 201                 }
 202
 203                 private string GenerateColumnMetaData (SqlCommand tmpCmd, DataTable colMetaData, DataTable tableCollations)
 204                 {
 205                         bool flag = false;
 206                         string statement = "";
 207                         int i = 0;
 208                         foreach (DataRow row in colMetaData.Rows) {
 209                                 flag = false;
 210                                 foreach (DataColumn col in colMetaData.Columns) { // FIXME: This line not required, remove later
 211                                         object value = null;
 212                                         if (_columnMappingCollection.Count > 0) {
 213                                                 if (ordinalMapping) {
 214                                                         foreach (SqlBulkCopyColumnMapping mapping
 215                                                                  in _columnMappingCollection) {
 216                                                                 if (mapping.DestinationOrdinal == i) {
 217                                                                         flag = true;
 218                                                                         break;
 219                                                                 }
 220                                                         }
 221                                                 } else {
 222                                                         foreach (SqlBulkCopyColumnMapping mapping
 223                                                                  in _columnMappingCollection) {
 224                                                                 if (mapping.DestinationColumn == (string) row ["ColumnName"]) {
 225                                                                         flag = true;
 226                                                                         break;
 227                                                                 }
 228                                                         }
 229                                                 }
 230                                                 if (flag == false)
 231                                                         break;
 232                                         }
 233                                         if ((bool)row ["IsReadOnly"]) {
 234                                                 if (ordinalMapping)
 235                                                         value = false;
 236                                                 else
 237                                                         break;
 238                                         }
 239                                         SqlParameter param = new SqlParameter ((string) row ["ColumnName"],
 240                                                                                ((SqlDbType) row ["ProviderType"]));
 241                                         param.Value = value;
 242                                         if ((int)row ["ColumnSize"] != -1) {
 243                                                 param.Size = (int) row ["ColumnSize"];
 244                                         }
 245
 246                                         short numericPresision = (short)row ["NumericPrecision"];
 247                                         if (numericPresision != 255) {
 248                                                 param.Precision = (byte) numericPresision;
 249                                         }
 250
 251                                         short numericScale = (short)row ["NumericScale"];
 252                                         if (numericScale != 255) {
 253                                                 param.Scale = (byte) numericScale;
 254                                         }
 255
 256                                         param.IsNullable = (bool)row ["AllowDBNull"];
 257                                         tmpCmd.Parameters.Add (param);
 258                                         break;
 259                                 }
 260                                 i++;
 261                         }
 262                         flag = false;
 263                         bool insertSt = false;
 264                         foreach (DataRow row in colMetaData.Rows) {
 265                                 SqlDbType sqlType = (SqlDbType) row ["ProviderType"];
 266                                 if (_columnMappingCollection.Count > 0) {
 267                                         i = 0;
 268                                         insertSt = false;
 269                                         foreach (SqlParameter param in tmpCmd.Parameters) {
 270                                                 if (ordinalMapping) {
 271                                                         foreach (SqlBulkCopyColumnMapping mapping
 272                                                                  in _columnMappingCollection) {
 273                                                                 if (mapping.DestinationOrdinal == i && param.Value == null) {
 274                                                                         insertSt = true;
 275                                                                 }
 276                                                         }
 277                                                 } else {
 278                                                         foreach (SqlBulkCopyColumnMapping mapping
 279                                                                  in _columnMappingCollection) {
 280                                                                 if (mapping.DestinationColumn == param.ParameterName &&
 281                                                                     (string)row ["ColumnName"] == param.ParameterName) {
 282                                                                         insertSt = true;
 283                                                                         param.Value = null;
 284                                                                 }
 285                                                         }
 286                                                 }
 287                                                 i++;
 288                                                 if (insertSt == true)
 289                                                         break;
 290                                         }
 291                                         if (insertSt == false)
 292                                                 continue;
 293                                 }
 294                                 if ((bool)row ["IsReadOnly"]) {
 295                                         continue;
 296                                 }
 297
 298                                 int columnSize = (int)row ["ColumnSize"];
 299                                 string columnInfo = "";
 300
 301                                 if (columnSize >= TdsMetaParameter.maxVarCharCharacters && sqlType == SqlDbType.Text)
 302                                         columnInfo = "VarChar(max)";
 303                                 else if (columnSize >= TdsMetaParameter.maxNVarCharCharacters && sqlType == SqlDbType.NText)
 304                                         columnInfo = "NVarChar(max)";
 305                                 else if (IsTextType(sqlType) && columnSize != -1) {
 306                                         columnInfo = string.Format ("{0}({1})",
 307                                                 sqlType,
 308                                                 columnSize.ToString());
 309                                 } else {
 310                                         columnInfo = string.Format ("{0}", sqlType);
 311                                 }
 312
 313                                 if ( sqlType == SqlDbType.Decimal)
 314                                         columnInfo += String.Format("({0},{1})", row ["NumericPrecision"], row ["NumericScale"]);
 315
 316                                 if (flag)
 317                                         statement += ", ";
 318                                 string columnName = (string) row ["ColumnName"];
 319                                 statement += string.Format ("[{0}] {1}", columnName, columnInfo);
 320                                 if (flag == false)
 321                                         flag = true;
 322                                 if (IsTextType(sqlType) && tableCollations != null) {
 323                                         foreach (DataRow collationRow in tableCollations.Rows) {
 324                                                 if ((string)collationRow ["name"] == columnName) {
 325                                                         statement += string.Format (" COLLATE {0}", collationRow ["collation"]);
 326                                                         break;
 327                                                 }
 328                                         }
 329                                 }
 330                         }
 331                         return statement;
 332                 }
 333
 334                 private void ValidateColumnMapping (DataTable table, DataTable tableCollations)
 335                 {
 336                         // So the problem here is that temp tables will not have any table collations.  This prevents
 337                         // us from bulk inserting into temp tables.  So for now we will skip the validation and
 338                         // let SqlServer tell us there is an issue rather than trying to do it here.
 339                         // So for now we will simply return and do nothing.
 340                         // TODO: At some point we should remove this function if we all agree its the right thing to do
 341                         return;
 342
 343 //                      foreach (SqlBulkCopyColumnMapping _columnMapping in _columnMappingCollection) {
 344 //                              if (ordinalMapping == false &&
 345 //                                  (_columnMapping.DestinationColumn == String.Empty ||
 346 //                                   _columnMapping.SourceColumn == String.Empty))
 347 //                                      throw new InvalidOperationException ("Mappings must be either all null or ordinal");
 348 //                              if (ordinalMapping &&
 349 //                                  (_columnMapping.DestinationOrdinal == -1 ||
 350 //                                   _columnMapping.SourceOrdinal == -1))
 351 //                                      throw new InvalidOperationException ("Mappings must be either all null or ordinal");
 352 //                              bool flag = false;
 353 //                              if (ordinalMapping == false) {
 354 //                                      foreach (DataRow row in tableCollations.Rows) {
 355 //                                              if ((string)row ["name"] == _columnMapping.DestinationColumn) {
 356 //                                                      flag = true;
 357 //                                                      break;
 358 //                                              }
 359 //                                      }
 360 //                                      if (flag == false)
 361 //                                              throw new InvalidOperationException ("ColumnMapping does not match");
 362 //                                      flag = false;
 363 //                                      foreach (DataColumn col in table.Columns) {
 364 //                                              if (col.ColumnName == _columnMapping.SourceColumn) {
 365 //                                                      flag = true;
 366 //                                                      break;
 367 //                                              }
 368 //                                      }
 369 //                                      if (flag == false)
 370 //                                              throw new InvalidOperationException ("ColumnName " +
 371 //                                                                                   _columnMapping.SourceColumn +
 372 //                                                                                   " does not match");
 373 //                              } else {
 374 //                                      if (_columnMapping.DestinationOrdinal >= tableCollations.Rows.Count)
 375 //                                              throw new InvalidOperationException ("ColumnMapping does not match");
 376 //                              }
 377 //                      }
 378                 }
 379
 380                 private void BulkCopyToServer (DataTable table, DataRowState state)
 381                 {
 382                         if (connection == null || connection.State == ConnectionState.Closed)
 383                                 throw new InvalidOperationException ("This method should not be called on a closed connection");
 384                         if (_destinationTableName == null)
 385                                 throw new ArgumentNullException ("DestinationTableName");
 386                         if (isLocalConnection && connection.State != ConnectionState.Open)
 387                                 connection.Open();
 388
 389                         if ((copyOptions & SqlBulkCopyOptions.KeepIdentity) == SqlBulkCopyOptions.KeepIdentity) {
 390                                 SqlCommand cmd = new SqlCommand ("set identity_insert " +
 391                                                                  table.TableName + " on",
 392                                                                  connection);
 393                                 cmd.ExecuteScalar ();
 394                         }
 395                         DataTable [] columnMetaDataTables = GetColumnMetaData ();
 396                         DataTable colMetaData = columnMetaDataTables [0];
 397                         DataTable tableCollations = columnMetaDataTables [1];
 398
 399                         if (_columnMappingCollection.Count > 0) {
 400                                 if (_columnMappingCollection [0].SourceOrdinal != -1)
 401                                         ordinalMapping = true;
 402                                 ValidateColumnMapping (table, tableCollations);
 403                         }
 404
 405                         SqlCommand tmpCmd = new SqlCommand ();
 406                         TdsBulkCopy blkCopy = new TdsBulkCopy ((Tds)connection.Tds);
 407                         if (((Tds)connection.Tds).TdsVersion >= TdsVersion.tds70) {
 408                                 string statement = "insert bulk " + DestinationTableName + " (";
 409                                 statement += GenerateColumnMetaData (tmpCmd, colMetaData, tableCollations);
 410                                 statement += ")";
 411
 412                                 #region Check requested options and add corresponding modifiers to the statement
 413                                 if ((copyOptions & insertModifiers) != SqlBulkCopyOptions.Default) {
 414                                         statement += " WITH (";
 415                                         bool commaRequired = false;
 416
 417                                         if ((copyOptions & SqlBulkCopyOptions.CheckConstraints) == SqlBulkCopyOptions.CheckConstraints) {
 418                                                 if (commaRequired)
 419                                                         statement += ", ";
 420                                                 statement += "CHECK_CONSTRAINTS";
 421                                                 commaRequired = true;
 422                                         }
 423
 424                                         if ((copyOptions & SqlBulkCopyOptions.TableLock) == SqlBulkCopyOptions.TableLock) {
 425                                                 if (commaRequired)
 426                                                         statement += ", ";
 427                                                 statement += "TABLOCK";
 428                                                 commaRequired = true;
 429                                         }
 430
 431                                         if ((copyOptions & SqlBulkCopyOptions.KeepNulls) == SqlBulkCopyOptions.KeepNulls) {
 432                                                 if (commaRequired)
 433                                                         statement += ", ";
 434                                                 statement += "KEEP_NULLS";
 435                                                 commaRequired = true;
 436                                         }
 437
 438                                         if ((copyOptions & SqlBulkCopyOptions.FireTriggers) == SqlBulkCopyOptions.FireTriggers) {
 439                                                 if (commaRequired)
 440                                                         statement += ", ";
 441                                                 statement += "FIRE_TRIGGERS";
 442                                                 commaRequired = true;
 443                                         }
 444
 445                                         statement += ")";
 446                                 }
 447                                 #endregion Check requested options and add corresponding modifiers to the statement
 448
 449                                 blkCopy.SendColumnMetaData (statement);
 450                         }
 451                         blkCopy.BulkCopyStart (tmpCmd.Parameters.MetaParameters);
 452                         long noRowsCopied = 0;
 453                         foreach (DataRow row in table.Rows) {
 454                                 if (row.RowState == DataRowState.Deleted)
 455                                         continue; // Don't copy the row that's in deleted state
 456                                 if (state != 0 && row.RowState != state)
 457                                         continue;
 458                                 bool isNewRow = true;
 459                                 int i = 0;
 460                                 foreach (SqlParameter param in tmpCmd.Parameters) {
 461                                         int size = 0;
 462                                         object rowToCopy = null;
 463                                         if (_columnMappingCollection.Count > 0) {
 464                                                 if (ordinalMapping) {
 465                                                         foreach (SqlBulkCopyColumnMapping mapping
 466                                                                  in _columnMappingCollection) {
 467                                                                 if (mapping.DestinationOrdinal == i && param.Value == null) {
 468                                                                         rowToCopy = row [mapping.SourceOrdinal];
 469                                                                         SqlParameter parameter = new SqlParameter (mapping.SourceOrdinal.ToString (),
 470                                                                                                                    rowToCopy);
 471                                                                         if (param.MetaParameter.TypeName != parameter.MetaParameter.TypeName) {
 472                                                                                 parameter.SqlDbType = param.SqlDbType;
 473                                                                                 rowToCopy = parameter.Value = parameter.ConvertToFrameworkType (rowToCopy);
 474                                                                         }
 475                                                                         string colType = string.Format ("{0}", parameter.MetaParameter.TypeName);
 476                                                                         if (colType == "nvarchar" || colType == "ntext" || colType == "nchar") {
 477                                                                                 if (row [i] != null && row [i] != DBNull.Value) {
 478                                                                                         size = ((string) parameter.Value).Length;
 479                                                                                         size <<= 1;
 480                                                                                 }
 481                                                                         } else if (colType == "varchar" || colType == "text" || colType == "char") {
 482                                                                                 if (row [i] != null && row [i] != DBNull.Value)
 483                                                                                         size = ((string) parameter.Value).Length;
 484                                                                         } else {
 485                                                                                 size = parameter.Size;
 486                                                                         }
 487                                                                         break;
 488                                                                 }
 489                                                         }
 490                                                 } else {
 491                                                         foreach (SqlBulkCopyColumnMapping mapping
 492                                                                  in _columnMappingCollection) {
 493                                                                 if (mapping.DestinationColumn == param.ParameterName) {
 494                                                                         rowToCopy = row [mapping.SourceColumn];
 495                                                                         SqlParameter parameter = new SqlParameter (mapping.SourceColumn, rowToCopy);
 496                                                                         if (param.MetaParameter.TypeName != parameter.MetaParameter.TypeName) {
 497                                                                                 parameter.SqlDbType = param.SqlDbType;
 498                                                                                 rowToCopy = parameter.Value = parameter.ConvertToFrameworkType (rowToCopy);
 499                                                                         }
 500                                                                         string colType = string.Format ("{0}", parameter.MetaParameter.TypeName);
 501                                                                         if (colType == "nvarchar" || colType == "ntext" || colType == "nchar") {
 502                                                                                 if (row [mapping.SourceColumn] != null && row [mapping.SourceColumn] != DBNull.Value) {
 503                                                                                         size = ((string) rowToCopy).Length;
 504                                                                                         size <<= 1;
 505                                                                                 }
 506                                                                         } else if (colType == "varchar" || colType == "text" || colType == "char") {
 507                                                                                 if (row [mapping.SourceColumn] != null && row [mapping.SourceColumn] != DBNull.Value)
 508                                                                                         size = ((string) rowToCopy).Length;
 509                                                                         } else {
 510                                                                                 size = parameter.Size;
 511                                                                         }
 512                                                                         break;
 513                                                                 }
 514                                                         }
 515                                                 }
 516                                                 i++;
 517                                         } else {
 518                                                 rowToCopy = row [param.ParameterName];
 519                                                 string colType = param.MetaParameter.TypeName;
 520                                                 /*
 521                                                   If column type is SqlDbType.NVarChar the size of parameter is multiplied by 2
 522                                                   FIXME: Need to check for other types
 523                                                 */
 524                                                 if (colType == "nvarchar" || colType == "ntext" || colType == "nchar") {
 525                                                         size = ((string) row [param.ParameterName]).Length;
 526                                                         size <<= 1;
 527                                                 } else if (colType == "varchar" || colType == "text" || colType == "char") {
 528                                                         size = ((string) row [param.ParameterName]).Length;
 529                                                 } else {
 530                                                         size = param.Size;
 531                                                 }
 532                                         }
 533                                         if (rowToCopy == null)
 534                                                 continue;
 535
 536                                         blkCopy.BulkCopyData (rowToCopy, isNewRow, size, param.MetaParameter);
 537
 538                                         if (isNewRow)
 539                                                 isNewRow = false;
 540                                 } // foreach (SqlParameter)
 541                                 if (_notifyAfter > 0) {
 542                                         noRowsCopied ++;
 543                                         if (noRowsCopied >= _notifyAfter) {
 544                                                 RowsCopied (noRowsCopied);
 545                                                 noRowsCopied = 0;
 546                                         }
 547                                 }
 548                         } // foreach (DataRow)
 549                         blkCopy.BulkCopyEnd ();
 550                 }
 551
 552                 private bool IsTextType(SqlDbType sqlType)
 553                 {
 554                         return (sqlType == SqlDbType.NText ||
 555                                 sqlType == SqlDbType.NVarChar ||
 556                                 sqlType == SqlDbType.Text ||
 557                                 sqlType == SqlDbType.VarChar ||
 558                                 sqlType == SqlDbType.Char ||
 559                                 sqlType == SqlDbType.NChar);
 560                 }
 561
 562                 public void WriteToServer (DataRow [] rows)
 563                 {
 564                         if (rows == null)
 565                                 throw new ArgumentNullException ("rows");
 566                         if (rows.Length == 0)
 567                                 return;
 568                         DataTable table = new DataTable (rows [0].Table.TableName);
 569                         foreach (DataColumn col in rows [0].Table.Columns) {
 570                                 DataColumn tmpCol = new DataColumn (col.ColumnName, col.DataType);
 571                                 table.Columns.Add (tmpCol);
 572                         }
 573                         foreach (DataRow row in rows) {
 574                                 DataRow tmpRow = table.NewRow ();
 575                                 for (int i = 0; i < table.Columns.Count; i++) {
 576                                         tmpRow [i] = row [i];
 577                                 }
 578                                 table.Rows.Add (tmpRow);
 579                         }
 580                         BulkCopyToServer (table, 0);
 581                 }
 582
 583                 public void WriteToServer (DataTable table)
 584                 {
 585                         BulkCopyToServer (table, 0);
 586                 }
 587
 588                 public void WriteToServer (IDataReader reader)
 589                 {
 590                         DataTable table = new DataTable ();
 591                         SqlDataAdapter adapter = new SqlDataAdapter ();
 592                         adapter.FillInternal (table, reader);
 593                         BulkCopyToServer (table, 0);
 594                 }
 595
 596                 public void WriteToServer (DataTable table, DataRowState rowState)
 597                 {
 598                         BulkCopyToServer (table, rowState);
 599                 }
 600
 601                 private void RowsCopied (long rowsCopied)
 602                 {
 603                         SqlRowsCopiedEventArgs e = new SqlRowsCopiedEventArgs (rowsCopied);
 604                         if (null != SqlRowsCopied) {
 605                                 SqlRowsCopied (this, e);
 606                         }
 607                 }
 608
 609                 #endregion
 610
 611                 #region Events
 612
 613                 public event SqlRowsCopiedEventHandler SqlRowsCopied;
 614
 615                 #endregion
 616
 617                 void IDisposable.Dispose ()
 618                 {
 619                         //throw new NotImplementedException ();
 620                         if (isLocalConnection) {
 621                                 Close ();
 622                                 connection = null;
 623                         }
 624                 }
 625
 626         }
 627 }
 628