FormView.HeaderRow 属性
定义
重要
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获取表示 FormViewRow 控件中的标题行的 FormView 对象。
public:
virtual property System::Web::UI::WebControls::FormViewRow ^ HeaderRow { System::Web::UI::WebControls::FormViewRow ^ get(); };[System.ComponentModel.Browsable(false)]
public virtual System.Web.UI.WebControls.FormViewRow HeaderRow { get; }[<System.ComponentModel.Browsable(false)>]
member this.HeaderRow : System.Web.UI.WebControls.FormViewRowPublic Overridable ReadOnly Property HeaderRow As FormViewRow属性值
一个 FormViewRow，表示 FormView 控件中的标题行。
- 属性
示例
以下示例演示如何在事件期间使用 HeaderRow 属性以编程方式修改标题行的属性 ItemCreated 。
<%@ Page language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
void EmployeeFormView_ItemCreated(Object sender, EventArgs e)
{
// Use the HeaderRow property to retrieve the header row.
FormViewRow header = EmployeeFormView.HeaderRow;
// Retrieve the HeaderLabel Label control from the header row.
Label headerLabel = (Label)header.FindControl("HeaderLabel");
if(headerLabel != null)
{
// Display the current page number.
int currentPage = EmployeeFormView.PageIndex + 1;
headerLabel.Text = "Page " + currentPage.ToString();
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>FormView HeaderTemplate Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>FormView HeaderTemplate Example</h3>
<asp:formview id="EmployeeFormView"
datasourceid="EmployeeSource"
allowpaging="true"
datakeynames="EmployeeID"
onitemcreated="EmployeeFormView_ItemCreated"
runat="server">
<headertemplate>
<table>
<tr>
<td>
<asp:image id="LogoImage"
imageurl="~/Images/LogoImage.jpg"
alternatetext="Our Logo"
runat="server"/>
</td>
<td>
<asp:label id="HeaderLabel"
runat="server"/>
</td>
</tr>
</table>
</headertemplate>
<headerstyle horizontalalign="Center"
forecolor="White"
backcolor="LightBlue"/>
<itemtemplate>
<table>
<tr>
<td>
<asp:image id="EmployeeImage"
imageurl='<%# Eval("PhotoPath") %>'
alternatetext='<%# Eval("LastName") %>'
runat="server"/>
</td>
<td>
<h3><%# Eval("FirstName") %> <%# Eval("LastName") %></h3>
<%# Eval("Title") %>
</td>
</tr>
</table>
</itemtemplate>
<pagersettings position="Bottom"
mode="NextPrevious"/>
</asp:formview>
<!-- This example uses Microsoft SQL Server and connects -->
<!-- to the Northwind sample database. Use an ASP.NET -->
<!-- expression to retrieve the connection string value -->
<!-- from the Web.config file. -->
<asp:sqldatasource id="EmployeeSource"
selectcommand="Select [EmployeeID], [LastName], [FirstName], [Title], [PhotoPath] From [Employees]"
connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>"
runat="server"/>
</form>
</body>
</html>
<%@ 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">
Sub EmployeeFormView_ItemCreated(ByVal sender As Object, ByVal e As EventArgs)
' Use the HeaderRow property to retrieve the header row.
Dim header As FormViewRow = EmployeeFormView.HeaderRow
' Retrieve the HeaderLabel Label control from the header row.
Dim headerLabel As Label = CType(header.FindControl("HeaderLabel"), Label)
If headerLabel IsNot Nothing Then
' Display the current page number.
Dim currentPage As Integer = EmployeeFormView.PageIndex + 1
headerLabel.Text = "Page " & currentPage.ToString()
End If
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>FormView HeaderTemplate Example</title>
</head>
<body>
<form id="Form1" runat="server">
<h3>FormView HeaderTemplate Example</h3>
<asp:formview id="EmployeeFormView"
datasourceid="EmployeeSource"
allowpaging="true"
datakeynames="EmployeeID"
onitemcreated="EmployeeFormView_ItemCreated"
runat="server">
<headertemplate>
<table>
<tr>
<td>
<asp:image id="LogoImage"
imageurl="~/Images/LogoImage.jpg"
alternatetext="Our Logo"
runat="server"/>
</td>
<td>
<asp:label id="HeaderLabel"
runat="server"/>
</td>
</tr>
</table>
</headertemplate>
<headerstyle horizontalalign="Center"
forecolor="White"
backcolor="LightBlue"/>
<itemtemplate>
<table>
<tr>
<td>
<asp:image id="EmployeeImage"
imageurl='<%# Eval("PhotoPath") %>'
alternatetext='<%# Eval("LastName") %>'
runat="server"/>
</td>
<td>
<h3><%# Eval("FirstName") %> <%# Eval("LastName") %></h3>
<%# Eval("Title") %>
</td>
</tr>
</table>
</itemtemplate>
<pagersettings position="Bottom"
mode="NextPrevious"/>
</asp:formview>
<!-- This example uses Microsoft SQL Server and connects -->
<!-- to the Northwind sample database. Use an ASP.NET -->
<!-- expression to retrieve the connection string value -->
<!-- from the Web.config file. -->
<asp:sqldatasource id="EmployeeSource"
selectcommand="Select [EmployeeID], [LastName], [FirstName], [Title], [PhotoPath] From [Employees]"
connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>"
runat="server"/>
</form>
</body>
</html>
注解
设置 或 HeaderTemplate 属性时HeaderText，FormView标题行显示在控件的顶部。 HeaderRow使用 属性以编程方式访问FormViewRow表示标题行的对象。
备注
属性HeaderRow仅在 控件在 事件中创建ItemCreated标题行后FormView可用。
当需要以编程方式操作标题行时（例如，添加自定义内容时），通常使用此属性。 对 属性的任何修改 HeaderRow 必须在控件呈现后 FormView 执行;否则，控件 FormView 将覆盖任何更改。
