MenuItem.Selected 属性
定义
重要
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获取或设置一个值，该值指示 Menu 控件的当前菜单项是否已被选中。
public:
property bool Selected { bool get(); void set(bool value); };[System.ComponentModel.Browsable(true)]
public bool Selected { get; set; }[<System.ComponentModel.Browsable(true)>]
member this.Selected : bool with get, setPublic Property Selected As Boolean属性值
如果 Menu 控件的当前菜单项已选中，则为 true；否则为 false。 默认值为 false。
- 属性
示例
下面的示例演示如何在首次加载页面时使用 Selected 属性在控件中选择 Menu 特定的菜单项。 若要使此示例正常工作，必须将下面的示例网站地图数据复制到名为 Web.sitemap 的文件。
<%@ 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 NavigationMenu_MenuItemDataBound(Object sender, MenuEventArgs e)
{
// Get the menu item being bound to data.
MenuItem item = e.Item;
// Use the Selected property to select the Home
// menu item when the page is first loaded.
if (item.Text == "Home")
{
item.Selected = true;
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>MenuItem Selected Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>MenuItem Selected Example</h3>
<asp:menu id="NavigationMenu"
staticdisplaylevels="2"
staticsubmenuindent="10"
orientation="Vertical"
target="_blank"
datasourceid="MenuSource"
onmenuitemdatabound="NavigationMenu_MenuItemDataBound"
runat="server">
<staticselectedstyle backcolor="Yellow"/>
</asp:menu>
<asp:sitemapdatasource id="MenuSource"
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 NavigationMenu_MenuItemDataBound(ByVal sender As Object, ByVal e As MenuEventArgs)
' Get the menu item being bound to data.
Dim item As MenuItem = e.Item
' Use the Selected property to select the Home
' menu item when the page is first loaded.
If item.Text = "Home" Then
item.Selected = True
End If
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>MenuItem Selected Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>MenuItem Selected Example</h3>
<asp:menu id="NavigationMenu"
staticdisplaylevels="2"
staticsubmenuindent="10"
orientation="Vertical"
target="_blank"
datasourceid="MenuSource"
onmenuitemdatabound="NavigationMenu_MenuItemDataBound"
runat="server">
<staticselectedstyle backcolor="Yellow"/>
</asp:menu>
<asp:sitemapdatasource id="MenuSource"
runat="server"/>
</form>
</body>
</html>
下面是上一示例的示例站点地图数据。
<siteMap>
<siteMapNode url="~\Home.aspx"
title="Home"
description="Home">
<siteMapNode url="~\Music.aspx"
title="Music"
description="Music">
<siteMapNode url="~\Classical.aspx"
title="Classical"
description="Classical"/>
<siteMapNode url="~\Rock.aspx"
title="Rock"
description="Rock"/>
<siteMapNode url="~\Jazz.aspx"
title="Jazz"
description="Jazz"/>
</siteMapNode>
<siteMapNode url="~\Movies.aspx"
title="Movies"
description="Movies">
<siteMapNode url="~\Action.aspx"
title="Action"
description="Action"/>
<siteMapNode url="~\Drama.aspx"
title="Drama"
description="Drama"/>
<siteMapNode url="~\Musical.aspx"
title="Musical"
description="Musical"/>
</siteMapNode>
</siteMapNode>
</siteMap>
注解
使用 Selected 属性指定或确定是否选择了当前菜单项。
备注
尽管该属性可用于确定是否选择了菜单项，但使用 SelectedItem 该属性更为常见。
控件中一次 Menu 只能选择一个菜单项。