sql server中批量插入與更新兩種解決方案分享

 sql server中批量插入與更新兩種解決方案分享

若只是需要大批量插入資料使用bcp是最好的，若同時需要插入、刪除、更新建議使用SqlDataAdapter我測試過有很高的效率，一般情況下這兩種就滿足需求了

bcp方式

複製程式碼 程式碼如下:

/// <summary>

/// 大批量插入資料(2000每批次)

/// 已採用整體事物控制

/// </summary>

/// <param name=”connString”>資料庫連結字串</param>

/// <param name=”tableName”>資料庫伺服器上目標表名</param>

/// <param name=”dt”>含有和目標資料庫表結構完全一致(所包含的欄位名完全一致即可)的DataTable</param>

public static void BulkCopy(string connString, string tableName, DataTable dt)

{

using (SqlConnection conn = new SqlConnection(connString))

{

conn.Open();

using (SqlTransaction transaction = conn.BeginTransaction())

{

using (SqlBulkCopy bulkCopy = new SqlBulkCopy(conn, SqlBulkCopyOptions.Default, transaction))

{

bulkCopy.BatchSize = 2000;

bulkCopy.BulkCopyTimeout = _CommandTimeOut;

bulkCopy.DestinationTableName = tableName;

try

{

foreach (DataColumn col in dt.Columns)

{

bulkCopy.ColumnMappings.Add(col.ColumnName, col.ColumnName);

}

bulkCopy.WriteToServer(dt);

transaction.Commit();

}

catch (Exception ex)

{

transaction.Rollback();

throw ex;

}

finally

{

conn.Close();

}

}

}

}

}

SqlDataAdapter

複製程式碼 程式碼如下:

/// <summary>

/// 批量更新資料(每批次5000)

/// </summary>

/// <param name=”connString”>資料庫連結字串</param>

/// <param name=”table”></param>

public static void Update(string connString, DataTable table)

{

SqlConnection conn = new SqlConnection(connString);

SqlCommand comm = conn.CreateCommand();

comm.CommandTimeout = _CommandTimeOut;

comm.CommandType = CommandType.Text;

SqlDataAdapter adapter = new SqlDataAdapter(comm);

SqlCommandBuilder commandBulider = new SqlCommandBuilder(adapter);

commandBulider.ConflictOption = ConflictOption.OverwriteChanges;

try

{

conn.Open();

//設定批量更新的每次處理條數

adapter.UpdateBatchSize = 5000;

adapter.SelectCommand.Transaction = conn.BeginTransaction();/////////////////開始事務

if (table.ExtendedProperties[“SQL”] != null)

{

adapter.SelectCommand.CommandText = table.ExtendedProperties[“SQL”].ToString();

}

adapter.Update(table);

adapter.SelectCommand.Transaction.Commit();/////提交事務

}

catch (Exception ex)

{

if (adapter.SelectCommand != null && adapter.SelectCommand.Transaction != null)

{

adapter.SelectCommand.Transaction.Rollback();

}

throw ex;

}

finally

{

conn.Close();

conn.Dispose();

}

}