ASP.NET 2.0中合并 GridView 的表头单元格
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>
