protected void GridView1_RowCreated(object sender, GridViewRowEventArgs e)

     {

         if (e.Row.RowType == DataControlRowType.Header)

         {

             TableCellCollection tcHeader = e.Row.Cells;//获取表头行的所有单元

             tcHeader.Clear();//清空原有的表头信息

 

             TableHeaderCell th = null;//

             for (int i = 1; i <= 10; i++)

             {//模拟建10个子列

                 th = new TableHeaderCell();

                 th.Text = "方案_" + i;

                 th.Width = 80;

                 tcHeader.Add(th);

 

             }

             GridViewRow rowHeader = new GridViewRow(0, 0, DataControlRowType.Header, DataControlRowState.Normal);//建一个表头行

             TableHeaderCell th2;

             th2 = new TableHeaderCell();

             th2.RowSpan = 2;

             th2.Text = "日期";

             th2.Width = 100;