Menu.MenuItemDataBound Evento

Definizione

Si verifica quando una voce di menu in un controllo Menu viene associata ai dati.Occurs when a menu item in a Menu control is bound to data.

public:
 event System::Web::UI::WebControls::MenuEventHandler ^ MenuItemDataBound;
public event System.Web.UI.WebControls.MenuEventHandler MenuItemDataBound;
member this.MenuItemDataBound : System.Web.UI.WebControls.MenuEventHandler 
Public Custom Event MenuItemDataBound As MenuEventHandler 

Esempi

Nell'esempio di codice seguente viene illustrato come creare un gestore eventi per MenuItemDataBound l'evento che modifica il testo Home della voce di menu prima che venga visualizzato in Menu un controllo.The following code example demonstrates how to create an event handler for the MenuItemDataBound event that modifies the text of the Home menu item before it is displayed in a Menu control.


<%@ 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)
  {
    // Modify the text of the Home menu item by 
    // adding parenthesis around the text. 
    if (e.Item.Text == "Home")
    {
      e.Item.Text = "(" + e.Item.Text + ")";
    }
  }
  
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>Menu MenuItemDataBound Example</title>
</head>
<body>
    <form id="form1" runat="server">
    
      <h3>Menu MenuItemDataBound Example</h3>
    
      <asp:menu id="NavigationMenu"
        staticdisplaylevels="2"
        staticsubmenuindent="10" 
        orientation="Vertical"
        target="_blank"
        datasourceid="MenuSource"
        onmenuitemdatabound="NavigationMenu_MenuItemDataBound"    
        runat="server">

      </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)
  
    ' Modify the text of the Home menu item by 
    ' adding parenthesis around the text. 
    If e.Item.Text = "Home" Then
    
      e.Item.Text = "(" & e.Item.Text & ")"
    
    End If
      
  End Sub
  
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>Menu MenuItemDataBound Example</title>
</head>
<body>
    <form id="form1" runat="server">
    
      <h3>Menu MenuItemDataBound Example</h3>
    
      <asp:menu id="NavigationMenu"
        staticdisplaylevels="2"
        staticsubmenuindent="10" 
        orientation="Vertical"
        target="_blank"
        datasourceid="MenuSource"
        onmenuitemdatabound="NavigationMenu_MenuItemDataBound"    
        runat="server">

      </asp:menu>
      
      <asp:SiteMapDataSource id="MenuSource"
        runat="server"/>        

    </form>
  </body>
</html>

Commenti

L' MenuItemDataBound evento viene generato quando una voce di menu viene associata ai dati in Menu un controllo.The MenuItemDataBound event is raised when a menu item is bound to data in a Menu control. Questo consente di fornire un gestore eventi che esegue una routine personalizzata, ad esempio l'aggiunta di contenuto personalizzato o la modifica di una voce di menu prima del rendering, ogni volta che si verifica questo evento.This allows you to provide an event handler that performs a custom routine, such as adding custom content or modifying a menu item before it is rendered, whenever this event occurs.

Un MenuEventArgs oggetto viene passato al gestore eventi, che consente di accedere alle proprietà della voce di menu che ha generato l'evento.A MenuEventArgs object is passed to the event handler, which allows you to access the properties of the menu item that raised the event.

Per altre informazioni su come gestire gli eventi, vedere la gestione e generazione di eventi.For more information about how to handle events, see Handling and Raising Events.

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Vedi anche