Condividi tramite

MenuItemCollection.AddAt(Int32, MenuItem) Metodo

  • Riferimento

Definizione

Spazio dei nomi:
System.Web.UI.WebControls
Assembly:
System.Web.dll

Inserisce nell'oggetto MenuItem corrente in corrispondenza della posizione di indice specificata l'oggetto MenuItemCollection specificato.

public:
 void AddAt(int index, System::Web::UI::WebControls::MenuItem ^ child);
public void AddAt (int index, System.Web.UI.WebControls.MenuItem child);
member this.AddAt : int * System.Web.UI.WebControls.MenuItem -> unit
Public Sub AddAt (index As Integer, child As MenuItem)

Parametri

index
Int32

Posizione dell'indice in base zero in corrispondenza della quale inserire l'oggetto MenuItem.

child
MenuItem

Oggetto MenuItem da inserire.

Esempio

Nell'esempio di codice seguente viene illustrato come utilizzare il AddAt metodo per inserire a livello di codice un MenuItem oggetto in un MenuItemCollection oggetto in una posizione di indice specificata.


<%@ 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 Page_Load(Object sender, EventArgs e)
  {
    if (!IsPostBack)
    {
      // Retrieve the root menu item from the Items
      // collection of the Menu control.
      MenuItem homeMenuItem = NavigationMenu.Items[0];

      // Create the submenu item.
      MenuItem newSubMenuItem = new MenuItem("New Category");

      // Insert the submenu item in the ChildItems
      // collection of the root menu item at index 0.
      homeMenuItem.ChildItems.AddAt(0, newSubMenuItem);
    }
  }

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>MenuItemCollection AddAt Example</title>
</head>
<body>
    <form id="form1" runat="server">
    
      <h3>MenuItemCollection AddAt Example</h3>
    
      <asp:menu id="NavigationMenu"
        orientation="Vertical"
        target="_blank" 
        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>

    </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 Page_Load(ByVal sender As Object, ByVal e As EventArgs)

    If Not IsPostBack Then

      ' Retrieve the root menu item from the Items
      ' collection of the Menu control.
      Dim homeMenuItem As MenuItem = NavigationMenu.Items(0)

      ' Create the submenu item.
      Dim newSubMenuItem = New MenuItem("New Category")

      ' Insert the submenu item in the ChildItems
      ' collection of the root menu item at index 0.
      homeMenuItem.ChildItems.AddAt(0, newSubMenuItem)
    
    End If
      
  End Sub

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>MenuItemCollection AddAt Example</title>
</head>
<body>
    <form id="form1" runat="server">
    
      <h3>MenuItemCollection AddAt Example</h3>
    
      <asp:menu id="NavigationMenu"
        orientation="Vertical"
        target="_blank" 
        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>

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

Commenti

Utilizzare il AddAt metodo per inserire l'oggetto specificato MenuItem nell'insieme in corrispondenza dell'indice specificato.

Nota

È possibile aggiungere valori Null e oggetti duplicati MenuItem alla raccolta.

In alternativa, è possibile aggiungere semplicemente un MenuItem oggetto alla fine della raccolta usando il Add metodo .

Si applica a

Vedi anche