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ASP.NET 2.0中合并 GridView 的表头单元格

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孟宪会

2006-10-7

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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">

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">

      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>