GridView合并头列

OnRowCreated="classall_rowcreated"

if(e.Row.RowType==DataControlRowType.Header){
            GridViewRow rowHeader2  = new GridViewRow(0, 0, DataControlRowType.Header, DataControlRowState.Normal);
            TableCellCollection cells2  = e.Row.Cells;
            TableCell headerCell2  = new TableCell();
            headerCell2.Text = "课程名称";
            headerCell2.RowSpan = 2;
            rowHeader2.Cells.Add(headerCell2);