datalist数据排序

  void pai(out DataSet dt, DataSet dd, out bool chk, bool ch)

    {

        chk = ch;

        dt = dd;

   

 

        DataTable dt1 = dd.Tables[0].Clone();

       

 

        for (int j = 0; j < dd.Tables[0].Rows.Count; j++)

        {

            DataRow dr=dt1.NewRow();//复制表dt1的行结构

       

            for (int i = 0; i < dd.Tables[0].Columns.Count; i++)

            {

                 if (chk)

                 {

                     dr[i] = dd.Tables[0].Rows[dd.Tables[0].Rows.Count - 1 - j][i];

                     if (j== dd.Tables[0].Rows.Count - 1&&i==dd.Tables[0].Columns.Count-1)

                     {

                         chk = false;

                     }

                 }

                 else

                 {

                     dr[i] = dd.Tables[0].Rows[j][i];

                     if (j == dd.Tables[0].Rows.Count - 1 && i == dd.Tables[0].Columns.Count - 1)

                     {

                         chk =true;

                     }

                 }

            }

            dt1.Rows.Add(dr);

        }

    

        dt.Tables.Clear(); //清除表

 

        dt.Tables.Add(dt1);

       

    }