Scalaj kolumny nagłówka GridView Wiele nagłówków ASP.NET

protected void GrdLeaveMaster_RowCreated(object sender, GridViewRowEventArgs e)

{

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

 {

 GridView HeaderGrid = (GridView)sender;

 GridViewRow HeaderGridRow =

 new GridViewRow(2, 2, DataControlRowType.EmptyDataRow,

 DataControlRowState.Insert);

 TableCell HeaderCell = new TableCell();

 HeaderCell.Text = "PaidLeave";

 HeaderCell.ColumnSpan = 2;

 HeaderGridRow.Cells.Add(HeaderCell); HeaderCell = new TableCell();

 HeaderCell.Text = "accumulated";

 HeaderCell.ColumnSpan = 2;

 HeaderGridRow.Cells.Add(HeaderCell); GrdLeaveMaster.Controls[0].Controls.AddAt(0, HeaderGridRow);

 }

}