ASP.NET 2.0中合并 GridView 的表头单元格

<% ... @ Page Language="C#" AutoEventWireup="true"  %>

<! DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
 "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" >

< script  runat ="server" > ...
  ICollection CreateDataSource()
  ...{
    System.Data.DataTable dt = new System.Data.DataTable();
    System.Data.DataRow dr;
    dt.Columns.Add(new System.Data.DataColumn("学生姓名", typeof(System.String)));
    dt.Columns.Add(new System.Data.DataColumn("语文", typeof(System.Decimal)));
    dt.Columns.Add(new System.Data.DataColumn("数学", typeof(System.Decimal)));
    dt.Columns.Add(new System.Data.DataColumn("英语", typeof(System.Decimal)));
    for (int i = 0; i < 8; i++)
    ...{
      System.Random rd = new System.Random(Environment.TickCount * i); ;
      dr = dt.NewRow();
      dr[0] = "学生" + i.ToString();
      dr[1] = System.Math.Round(rd.NextDouble() * 100, 2);
      dr[2] = System.Math.Round(rd.NextDouble() * 100, 2);
      dr[3] = System.Math.Round(rd.NextDouble() * 100, 2);
      dt.Rows.Add(dr);
    }
    System.Data.DataView dv = new System.Data.DataView(dt);
    return dv;
  }

  protected void Page_Load(object sender, EventArgs e)
  ...{
    if (!IsPostBack)
    ...{

      GridView1.BorderColor = System.Drawing.Color.DarkOrange;
      GridView1.DataSource = CreateDataSource();
      GridView1.DataBind();
    }
  }

  protected void GridView1_RowCreated(object sender, GridViewRowEventArgs e)
  ...{
    if (e.Row.RowType == DataControlRowType.Header)
    ...{
      GridViewRow rowHeader = new GridViewRow(0, 0, DataControlRowType.Header, DataControlRowState.Normal);
      rowHeader.BackColor = System.Drawing.Color.White;
      rowHeader.Font.Bold = true;

      TableCellCollection cells = e.Row.Cells;
      TableCell headerCell = new TableCell();
      headerCell.Text = "";
      rowHeader.Cells.Add(headerCell);

      headerCell = new TableCell();
      headerCell.Text = "学生成绩";
      headerCell.ColumnSpan = cells.Count - 1;
      headerCell.HorizontalAlign = HorizontalAlign.Center;

      rowHeader.Cells.Add(headerCell);
      rowHeader.Visible = true;
      GridView1.Controls[0].Controls.AddAt(0, rowHeader);
    }
  }

  protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
  ...{
    e.Row.Attributes.Add("style", "background:#FFF");
  }
</ script >

< html  xmlns ="http://www.w3.org/1999/xhtml" >
< head >
   < title > 合并 GridView 的表头单元格 </ title >
</ head >
< body >
   < form  id ="Form1"  runat ="server" >
     < asp:GridView  ID ="GridView1"  runat ="server"  CellSpacing ="1"  CellPadding ="3"
      Font-Size ="12px"  Width ="300px"  BackColor ="orange"  BorderWidth ="0"
      OnRowDataBound ="GridView1_RowDataBound"  OnRowCreated ="GridView1_RowCreated" >
     </ asp:GridView >
   </ form >
</ body >
</ html >