如何实现datagrid控件多层表头_IT百科

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<%@ 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">

// 计算数据，完全可以从数据看取得

ICollection CreateDataSource( )

{

System.Data.DataTable dt = new System.Data.DataTable()

System.Data.DataRow dr

dt.Columns.Add(new System.Data.DataColumn("学生班级", typeof(System.String)))

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)))

dt.Columns.Add(new System.Data.DataColumn("计算机", typeof(System.Decimal)))

for (int i = 0i <8i++)

{

System.Random rd = new System.Random(Environment.TickCount * i)

dr = dt.NewRow()

dr[0] = "班级" + i.ToString()

dr[1] = "学生" + i.ToString()

dr[2] = System.Math.Round(rd.NextDouble() * 100, 2)

dr[3] = System.Math.Round(rd.NextDouble() * 100, 2)

dr[4] = System.Math.Round(rd.NextDouble() * 100, 2)

dr[5] = 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)

{

//创建一个GridViewRow，相当于表格的 TR 一行

GridViewRow rowHeader = new GridViewRow(0, 0, DataControlRowType.Header, DataControlRowState.Normal)

string HeaderBackColor = "#EDEDED"

rowHeader.BackColor = System.Drawing.ColorTranslator.FromHtml(HeaderBackColor)

//实现确定要显示的表头样式，也可以通过计算生成

//<tr>

// <td rowspan='2'>关键单元格</td>

// <td colspan='2'>表头文字</td>

// <td>表头文字</td>

// </tr>

// <tr bgcolor='#FFF'>

// <td colspan='2'>表头文字</td>

// <td rowspan='2'>表头文字</td>

// <td colspan='2'>表头文字</td>

// </tr>

// <tr bgcolor='#FFF'>

// <td>表头文字</td>

// <td>表头文字</td>"

// </tr>

// 上面的样式可以设置斜线

Literal newCells = new Literal()

newCells.Text = @"表头文字1</th>

</tr>

<tr bgcolor='" + HeaderBackColor + "'>"

newCells.Text += @"

</tr>

<tr bgcolor='" + HeaderBackColor + "'>"

newCells.Text += @"

<th>表头文字12"

TableCellCollection cells = e.Row.Cells

TableHeaderCell headerCell = new TableHeaderCell()

//下面的属性设置与 <td rowspan='2'>关键单元格</td>要一致

headerCell.RowSpan = 2

headerCell.Controls.Add(newCells)

rowHeader.Cells.Add(headerCell)

rowHeader.Visible = true

//添加到 GridView1

GridView1.Controls[0].Controls.AddAt(0, rowHeader)

}

protected void GridView1_RowDataBound( object sender, GridViewRowEventArgs e )

{

if (e.Row.RowType == DataControlRowType.Header)

{

e.Row.Attributes.Add("style", "background:#9999FFcolor:#FFFFFFfont-size:14px")

}

else

{

e.Row.Attributes.Add("style", "background:#FFF")

}

</script>

<head>

<title>为 GridView 添加多层表头</title>

</head>

<body>

<asp:GridView ID="GridView1" runat="server" CellSpacing="1" CellPadding="3" Font-Size="12px"

Width="600px" BackColor="#000000" BorderWidth="0" OnRowDataBound="GridView1_RowDataBound"

OnRowCreated="GridView1_RowCreated">

</asp:GridView>

</form>

</body>

</html>

首先了解一下JSF中DataTable的渲染方式：DataTable--<Header UIComponent

--<ChildrenList<HtmlColumn

----<HtmlColumn

------<HeaderUIComponent

----<ChildrenList<UIComponent

因此，要在后台变更DataTable的状态，可以用dt.setHeader（UIComponent）设置DataTable的表头，然后可以往dt.getChildren（）中添加HtmlColumn类型的列，同样，列中也可以由Header和Children组成。

代码实现如下：

private void initialReportTable(List<ExcelReport reportList) {

dt.getChildren().clear()

for (ExcelReport report : reportList) {

HtmlColumn column = new HtmlColumn()

HtmlOutputText header = new HtmlOutputText()

header.setValueExpression("value",

getValueExpression("#{rmaReport.captions.c"

+ report.getPosition() + "}"))

column.setHeader(header)

HtmlOutputText value = new HtmlOutputText()

String ve = getVEString(report)

System.out.println(report.getCaption() + " : " + ve)

value.setValueExpression("value", getValueExpression(ve))

column.getChildren().add(value)

您好，您这样：

protected void Page_Load(object sender, EventArgs e)

{

if (!IsPostBack)

{

GridView1.DataSource = FormatDT()

GridView1.DataBind()

}

protected void GridView1_RowCreated(object sender, GridViewRowEventArgs e)

{

switch (e.Row.RowType)

{

//页头

case DataControlRowType.Header:

//第一行表头

TableCellCollection tcHeader = e.Row.Cells

tcHeader.Clear()