SqlBulkCopy导入数据（自增列保留原值）

 1 //自增列重新生成：SqlBulkCopy bc = new SqlBulkCopy(conn)
 2 //自增列保留原值：SqlBulkCopy bc = new SqlBulkCopy(conn,SqlBulkCopyOptions.KeepIdentity)
 3 using(SqlBulkCopy sbc = new SqlBulkCopy(conn,SqlBulkCopyOptions.KeepIdentity))
 4 {
 5     sbc.DestinationTableName = tableName;
 6     foreach (string col in colList)
 7     {
 8         sbc.ColumnMappings.Add(col, col);
 9     }
10     sbc.BulkCopyTimeout = 0;
11     sbc.WriteToServer(dt);
12 }