C#完成SQL批量拔出數據到表的辦法

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本文實例講述了C#完成SQL批量拔出數據到表的辦法。分享給年夜家供年夜家參考，詳細以下：

#region 贊助實例：SQL 批量拔出數據 多種辦法
/// <summary>
/// SqlBulkCopy往數據庫中批量拔出數據
/// </summary>
/// <param name="sourceDataTable">數據源表</param>
/// <param name="targetTableName">辦事器上目的表</param>
/// <param name="mapping">創立新的列映照，並應用列序號援用源列和目的列的列稱號。</param>
public static void BulkToDB(DataTable sourceDataTable, string targetTableName, SqlBulkCopyColumnMapping[] mapping)
{
  /* 挪用辦法 -2012年11月16日編寫
  //DataTable dt = Get_All_RoomState_ByHID();
  //SqlBulkCopyColumnMapping[] mapping = new SqlBulkCopyColumnMapping[4];
  //mapping[0] = new SqlBulkCopyColumnMapping("Xing_H_ID", "Xing_H_ID");
  //mapping[1] = new SqlBulkCopyColumnMapping("H_Name", "H_Name");
  //mapping[2] = new SqlBulkCopyColumnMapping("H_sName", "H_sName");
  //mapping[3] = new SqlBulkCopyColumnMapping("H_eName", "H_eName");
  //BulkToDB(dt, "Bak_Tts_Hotel_Name", mapping);
  */
  SqlConnection conn = new SqlConnection(SQLHelper.ConnectionString);
  SqlBulkCopy bulkCopy = new SqlBulkCopy(conn);  //用其它源的數據有用批量加載sql server表中
  bulkCopy.DestinationTableName = targetTableName;  //辦事器上目的表的稱號
  bulkCopy.BatchSize = sourceDataTable.Rows.Count;  //每批次中的行數
  try
  {
    conn.Open();
    if (sourceDataTable != null && sourceDataTable.Rows.Count != 0)
    {
      for (int i = 0; i < mapping.Length; i++)
        bulkCopy.ColumnMappings.Add(mapping[i]);
      //將供給的數據源中的一切行復制到目的表中
      bulkCopy.WriteToServer(sourceDataTable );  
    }
  }
  catch (Exception ex)
  {
    //throw ex;
    Common.WriteTextLog("BulkToDB", ex.Message);
  }
  finally
  {
    conn.Close();
    if (bulkCopy != null)
      bulkCopy.Close();
  }
}
/// <summary>
/// SQL2008以上方可支撐自界說表類型 :挪用存儲進程游標-往數據庫中批量拔出數據 ，留意
/// </summary>
/// <param name="sourceDataTable"></param>
public void DataTableToHotelDB(DataTable sourceDataTable)
{
  /* -2012年11月15日編寫
    ALTER PROCEDURE [dbo].[P_InsertSubject]
    @tempStudentID int
    AS
    DECLARE rs CURSOR LOCAL SCROLL FOR
    select H_ID from Tts_Hotel_Name 
    OPEN rs
    FETCH NEXT FROM rs INTO @tempStudentID
    WHILE @@FETCH_STATUS = 0
    BEGIN
    Insert student (tempStudentID) values (@tempStudentID)
    FETCH NEXT FROM rs INTO @tempStudentID
    END
    CLOSE rs
   * ***************************************************************
   * create table Orders
    (
    Orders_ID int identity(1,1) primary key,
    ItemCode nvarchar(50) not null,
    UM nvarchar(20) not null,
    Quantity decimal(18,6) not null,
    UnitPrice decimal(18,6) not null
    )
    --創立用戶自界說表類型，在可編程性->類型性->用戶自界說表類型
    create type OrdersTableType as table
    (
    ItemCode nvarchar(50) not null,
    UM nvarchar(20) not null,
    Quantity decimal(18,6) not null,
    UnitPrice decimal(18,6) not null
    )
    go
    create procedure Pro_Orders
    (
      @OrdersCollection OrdersTableType readonly
    )
    as
    insert into Orders([ItemCode],[UM],[Quantity],[UnitPrice])
      SELECT oc.[ItemCode],oc.[UM],[Quantity],oc.[UnitPrice] FROM @OrdersCollection AS oc;
    go
   * 
   */
  SqlParameter[] parameters = {new SqlParameter("@OrdersCollection", SqlDbType.Structured)};
  parameters[0].Value = sourceDataTable;
  new SQLHelper().ExecuteScalar("P_DataTable_ToHotelDB", parameters, true);
}
#endregion

願望本文所述對年夜家C#法式設計有所贊助。