三层表头书写

    protected void gdvOpenAR_RowDataBound(object sender, GridViewRowEventArgs e)
    {
            ColorConverter ccv = new ColorConverter();
            Color colorBlue = (Color)ccv.ConvertFromString("#006892"); // 表头color
            //重写表头，三层.
            if (e.Row.RowType == DataControlRowType.Header)
            {
                //第一行表头
                TableCellCollection tcl = e.Row.Cells;
                tcl.Clear();
                tcl.Add(new TableHeaderCell());
                tcl[0].RowSpan = 3;
                tcl[0].Text = "CUSTOMER";
                tcl[0].BackColor = colorBlue;

                tcl.Add(new TableHeaderCell());
                tcl[1].Text = "Standard Payment Term" ;
                tcl[1].RowSpan = 3;
                tcl[1].BackColor = colorBlue;

                tcl.Add(new TableHeaderCell());
                tcl[2].Text = "Credit Limite(K USD)";
                tcl[2].RowSpan = 3;
                tcl[2].BackColor = colorBlue;

                tcl.Add(new TableHeaderCell());
                tcl[3].Text = "Open AR(K USD)";
                tcl[3].RowSpan = 3;
                tcl[3].BackColor = colorBlue;

                tcl.Add(new TableHeaderCell());
                tcl[4].Text = "Avg. Coll. Day";
                tcl[4].RowSpan = 3;
                tcl[4].BackColor = colorBlue;

                tcl.Add(new TableHeaderCell());
                tcl[5].Text = "Receipt Amount(K USD)";
                tcl[5].RowSpan = 3;
                tcl[5].BackColor = colorBlue;

                tcl.Add(new TableHeaderCell());
                tcl[6].Text = "Total AR - Interest Cost";
                tcl[6].ColumnSpan = 4;
                tcl[6].BackColor = colorBlue;

                tcl.Add(new TableHeaderCell());
                tcl[7].Text = "Overdue AR - Interest Cost";
                tcl[7].ColumnSpan = 4;
                tcl[7].BackColor = colorBlue;

                tcl.Add(new TableHeaderCell());
                tcl[8].Text = "Non Overdue AR - Interest Cost" + "</th></tr><tr>";    //是第一层最后一列
                tcl[8].ColumnSpan = 4;
                tcl[8].BackColor = colorBlue;

                //第二行表头
                tcl.Add(new TableHeaderCell());
                tcl[9].ColumnSpan = 2;
                tcl[9].Text = "Aug.";
                tcl[9].HorizontalAlign = HorizontalAlign.Center;
                tcl[9].BackColor = colorBlue;

                tcl.Add(new TableHeaderCell());
                tcl[10].ColumnSpan = 2;
                tcl[10].Text = "Jul.";
                tcl[10].HorizontalAlign = HorizontalAlign.Center;
                tcl[10].BackColor = colorBlue;

                tcl.Add(new TableHeaderCell());
                tcl[11].ColumnSpan = 2;
                tcl[11].Text = "Aug.";
                tcl[11].HorizontalAlign = HorizontalAlign.Center;
                tcl[11].BackColor = colorBlue;

                tcl.Add(new TableHeaderCell());
                tcl[12].ColumnSpan = 2;
                tcl[12].Text = "Jul.";
                tcl[12].HorizontalAlign = HorizontalAlign.Center;
                tcl[12].BackColor = colorBlue;

                tcl.Add(new TableHeaderCell());
                tcl[13].ColumnSpan = 2;
                tcl[13].Text = "Aug.";
                tcl[13].HorizontalAlign = HorizontalAlign.Center;
                tcl[13].BackColor = colorBlue;

                tcl.Add(new TableHeaderCell());
                tcl[14].ColumnSpan = 2;
                tcl[14].Text = "Jul.</th></tr><tr>"; //是第二层最后一列
                tcl[14].HorizontalAlign = HorizontalAlign.Center;
                tcl[14].BackColor = colorBlue;

                //第三行表头
                tcl.Add(new TableHeaderCell());
                tcl[15].Text = "Total(KUSD)";
                tcl[15].HorizontalAlign = HorizontalAlign.Center;
                tcl[15].BackColor = colorBlue;

                tcl.Add(new TableHeaderCell());
                tcl[16].Text = "Per Watt";
                tcl[16].HorizontalAlign = HorizontalAlign.Center;
                tcl[16].BackColor = colorBlue;

                tcl.Add(new TableHeaderCell());
                tcl[17].Text = "Total(KUSD)";
                tcl[17].HorizontalAlign = HorizontalAlign.Center;
                tcl[17].BackColor = colorBlue;

                tcl.Add(new TableHeaderCell());
                tcl[18].Text = "Per Watt";
                tcl[18].HorizontalAlign = HorizontalAlign.Center;
                tcl[18].BackColor = colorBlue;

                tcl.Add(new TableHeaderCell());
                tcl[19].Text = "Total(KUSD)";
                tcl[19].HorizontalAlign = HorizontalAlign.Center;
                tcl[19].BackColor = colorBlue;

                tcl.Add(new TableHeaderCell());
                tcl[20].Text = "Per Watt";
                tcl[20].HorizontalAlign = HorizontalAlign.Center;
                tcl[20].BackColor = colorBlue;

                tcl.Add(new TableHeaderCell());
                tcl[21].Text = "Total(KUSD)";
                tcl[21].HorizontalAlign = HorizontalAlign.Center;
                tcl[21].BackColor = colorBlue;

                tcl.Add(new TableHeaderCell());
                tcl[22].Text = "Per Watt";
                tcl[22].HorizontalAlign = HorizontalAlign.Center;
                tcl[22].BackColor = colorBlue;

                tcl.Add(new TableHeaderCell());
                tcl[23].Text = "Total(KUSD)";
                tcl[23].HorizontalAlign = HorizontalAlign.Center;
                tcl[23].BackColor = colorBlue;

                tcl.Add(new TableHeaderCell());
                tcl[24].Text = "Per Watt";
                tcl[24].HorizontalAlign = HorizontalAlign.Center;
                tcl[24].BackColor = colorBlue;

                tcl.Add(new TableHeaderCell());
                tcl[25].Text = "Total(KUSD)";
                tcl[25].HorizontalAlign = HorizontalAlign.Center;
                tcl[25].BackColor = colorBlue;

                tcl.Add(new TableHeaderCell());
                tcl[26].Text = "Per Watt</th></tr>";
                tcl[26].HorizontalAlign = HorizontalAlign.Center;
                tcl[26].BackColor = colorBlue;
            }