#region 帮助实例：SQL 批量插入数据 多种方法
/// <summary>
/// SqlBulkCopy往数据库中批量插入数据
/// </summary>
/// <param name=\"sourceDataTable\">数据源表</param>
/// <param name=\"targetTableName\">服务器上目标表</param>
/// <param name=\"mapping\">创建新的列映射，并使用列序号引用源列和目标列的列名称。</param>
public static void BulkToDB(DataTable sourceDataTable, string targetTableName, SqlBulkCopyColumnMapping[] mapping)
{
  /* 调用方法 -2012年11月16日编写
  //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);  //用其它源的数据有效批量加载sql server表中
  bulkCopy.DestinationTableName = targetTableName;  //服务器上目标表的名称
  bulkCopy.BatchSize = sourceDataTable.Rows.Count;  //每一批次中的行数
  try
  {
    conn.Open();
    if (sourceDataTable != null && sourceDataTable.Rows.Count != 0)
    {
      for (int i = 0; i < mapping.Length; i++)
        bulkCopy.ColumnMappings.Add(mapping[i]);
      //将提供的数据源中的所有行复制到目标表中
      bulkCopy.WriteToServer(sourceDataTable );  
    }
  }
  catch (Exception ex)
  {
    //throw ex;
    Common.WriteTextLog(\"BulkToDB\", ex.Message);
  }
  finally
  {
    conn.Close();
    if (bulkCopy != null)
      bulkCopy.Close();
  }
}
/// <summary>
/// SQL2008以上方可支持自定义表类型 :调用存储过程游标-往数据库中批量插入数据 ，注意
/// </summary>
/// <param name=\"sourceDataTable\"></param>
public void DataTableToHotelDB(DataTable sourceDataTable)
{
  /* -2012年11月15日编写
    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
    )
    --创建用户自定义表类型，在可编程性->类型性->用户自定义表类型
    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