Menu.SelectedItem Propriedade

Definição

Espaço de Nomes:
System.Web.UI.WebControls
Assemblagem:
System.Web.dll

Recebe o item selecionado do menu.

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.MenuItem
Public ReadOnly Property SelectedItem As MenuItem

Valor de Propriedade

MenuItem

A MenuItem que representa o item selecionado do menu.

Atributos
BrowsableAttribute

Exemplos

O exemplo de código seguinte demonstra como usar a SelectedItem propriedade para determinar o item de menu selecionado num Menu controlo.


<%@ 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>

Observações

Use a SelectedItem propriedade para determinar o item do menu selecionado pelo utilizador.

Note

Como atalho, também pode determinar o texto do item selecionado do menu diretamente usando a SelectedValue propriedade.

Quando o utilizador seleciona um item de menu a partir de um Menu controlo, o MenuItemClick evento é levantado, o que permite executar uma rotina personalizada fornecendo um gestor de eventos.

Aplica-se a

Ver também