在实际工作中，往往需要合并表格头部的单元格，下面就是一个实现的例子。运行结果如图：
C#
<%...@ 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>
VB.NET
<%...@ Page Language="VB" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">...
Function CreateDataSource() As ICollection
Dim dt As System.Data.DataTable = New System.Data.DataTable
Dim dr As System.Data.DataRow
dt.Columns.Add(New System.Data.DataColumn("学生姓名", GetType(System.String)))
dt.Columns.Add(New System.Data.DataColumn("语文", GetType(System.Decimal)))
dt.Columns.Add(New System.Data.DataColumn("数学", GetType(System.Decimal)))
dt.Columns.Add(New System.Data.DataColumn("英语", GetType(System.Decimal)))
Dim i As Integer = 0
For i = 0 To 7
Dim rd As System.Random = 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)
Next
Dim dv As System.Data.DataView = New System.Data.DataView(dt)
Return dv
End Function
Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
If Not IsPostBack Then
GridView1.BorderColor = System.Drawing.Color.DarkOrange
GridView1.DataSource = CreateDataSource()
GridView1.DataBind()
End If
End Sub
Protected Sub GridView1_RowCreated(ByVal sender As Object, ByVal e As GridViewRowEventArgs)
If e.Row.RowType = DataControlRowType.Header Then
Dim rowHeader As GridViewRow = New GridViewRow(0, 0, DataControlRowType.Header, DataControlRowState.Normal)
rowHeader.BackColor = System.Drawing.Color.White
rowHeader.Font.Bold = True
Dim cells As TableCellCollection = e.Row.Cells
Dim headerCell As TableCell = 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)
End If
End Sub
Protected Sub GridView1_RowDataBound(ByVal sender As Object, ByVal e As GridViewRowEventArgs)
e.Row.Attributes.Add("style", "background:#FFF")
End Sub
</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>
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