Menu.SelectedItem 属性
定义
重要
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获取选定的菜单项。
public:
property System::Web::UI::WebControls::MenuItem ^ SelectedItem { System::Web::UI::WebControls::MenuItem ^ get(); };[System.ComponentModel.Browsable(false)]
public System.Web.UI.WebControls.MenuItem SelectedItem { get; }[<System.ComponentModel.Browsable(false)>]
member this.SelectedItem : System.Web.UI.WebControls.MenuItemPublic ReadOnly Property SelectedItem As MenuItem属性值
表示选定菜单项的 MenuItem。
- 属性
示例
下面的代码示例演示如何使用 SelectedItem 属性来确定控件中的 Menu 选定菜单项。
<%@ 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_MenuItemClick(Object sender, MenuEventArgs e)
{
// Use the SelectedItem property to retrieve the selected
// menu item.
MenuItem selectedItem = NavigationMenu.SelectedItem;
Message.Text = "You selected " +
NavigationMenu.SelectedItem.Text + ".";
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Menu SelectedItem Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>Menu SelectedItem Example</h3>
<asp:menu id="NavigationMenu"
staticdisplaylevels="2"
staticsubmenuindent="10"
orientation="Vertical"
onmenuitemclick="NavigationMenu_MenuItemClick"
runat="server">
<items>
<asp:menuitem text="Home"
tooltip="Home">
<asp:menuitem text="Music"
tooltip="Music">
<asp:menuitem text="Classical"
tooltip="Classical"/>
<asp:menuitem text="Rock"
tooltip="Rock"/>
<asp:menuitem text="Jazz"
tooltip="Jazz"/>
</asp:menuitem>
<asp:menuitem text="Movies"
tooltip="Movies">
<asp:menuitem text="Action"
tooltip="Action"/>
<asp:menuitem text="Drama"
tooltip="Drama"/>
<asp:menuitem text="Musical"
tooltip="Musical"/>
</asp:menuitem>
</asp:menuitem>
</items>
</asp:menu>
<hr/>
<asp:label id="Message"
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_MenuItemClick(ByVal sender As Object, ByVal e As MenuEventArgs)
' Use the SelectedItem property to retrieve the selected
' menu item.
Dim selectedItem As MenuItem = NavigationMenu.SelectedItem
Message.Text = "You selected " & _
NavigationMenu.SelectedItem.Text & "."
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Menu SelectedItem Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>Menu SelectedItem Example</h3>
<asp:menu id="NavigationMenu"
staticdisplaylevels="2"
staticsubmenuindent="10"
orientation="Vertical"
onmenuitemclick="NavigationMenu_MenuItemClick"
runat="server">
<items>
<asp:menuitem text="Home"
tooltip="Home">
<asp:menuitem text="Music"
tooltip="Music">
<asp:menuitem text="Classical"
tooltip="Classical"/>
<asp:menuitem text="Rock"
tooltip="Rock"/>
<asp:menuitem text="Jazz"
tooltip="Jazz"/>
</asp:menuitem>
<asp:menuitem text="Movies"
tooltip="Movies">
<asp:menuitem text="Action"
tooltip="Action"/>
<asp:menuitem text="Drama"
tooltip="Drama"/>
<asp:menuitem text="Musical"
tooltip="Musical"/>
</asp:menuitem>
</asp:menuitem>
</items>
</asp:menu>
<hr/>
<asp:label id="Message"
runat="server"/>
</form>
</body>
</html>
注解
SelectedItem使用 属性确定用户选择的菜单项。
注意
作为快捷方式，还可以使用 SelectedValue 属性直接确定所选菜单项的文本。
当用户从 Menu 控件中选择菜单项时， MenuItemClick 将引发 事件，这使你可以通过提供事件处理程序来执行自定义例程。
