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SiteMapNodeItem(Int32, SiteMapNodeItemType) Costruttore

  • Riferimento

Definizione

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

Inizializza una nuova istanza della classe SiteMapNodeItem con l'indice e l'oggetto SiteMapNodeItemType specificati.

public:
 SiteMapNodeItem(int itemIndex, System::Web::UI::WebControls::SiteMapNodeItemType itemType);
public SiteMapNodeItem (int itemIndex, System.Web.UI.WebControls.SiteMapNodeItemType itemType);
new System.Web.UI.WebControls.SiteMapNodeItem : int * System.Web.UI.WebControls.SiteMapNodeItemType -> System.Web.UI.WebControls.SiteMapNodeItem
Public Sub New (itemIndex As Integer, itemType As SiteMapNodeItemType)

Parametri

itemIndex
Int32

Indice nell'insieme Controls utilizzato dal controllo SiteMapPath per tenere traccia dell'oggetto SiteMapNodeItem.

itemType
SiteMapNodeItemType

Tipo funzionale di SiteMapNode rappresentato da questo oggetto SiteMapNodeItem.

Esempio

Nell'esempio di codice seguente viene illustrato come creare un SiteMapNodeItem oggetto . Questo esempio di codice fa parte di un esempio più ampio fornito per la SiteMapPath classe .

private void AddDropDownListAfterCurrentNode(SiteMapNodeItem item) {

    SiteMapNodeCollection childNodes = item.SiteMapNode.ChildNodes;

    // Only do this work if there are child nodes.
    if (childNodes != null) {

        // Add another PathSeparator after the CurrentNode.
        SiteMapNodeItem finalSeparator =
            new SiteMapNodeItem(item.ItemIndex,
                                SiteMapNodeItemType.PathSeparator);

        SiteMapNodeItemEventArgs eventArgs =
            new SiteMapNodeItemEventArgs(finalSeparator);

        InitializeItem(finalSeparator);
        // Call OnItemCreated every time a SiteMapNodeItem is
        // created and initialized.
        OnItemCreated(eventArgs);

        // The pathSeparator does not bind to any SiteMapNode, so
        // do not call DataBind on the SiteMapNodeItem.
        item.Controls.Add(finalSeparator);

        // Create a DropDownList and populate it with the children of the
        // CurrentNode. There are no styles or templates that are applied
        // to the DropDownList control. If OnSelectedIndexChanged is raised,
        // the event handler redirects to the page selected.
        // The CurrentNode has child nodes.
        DropDownList ddList = new DropDownList();
        ddList.AutoPostBack = true;

        ddList.SelectedIndexChanged += new EventHandler(this.DropDownNavPathEventHandler);

        // Add a ListItem to the DropDownList for every node in the
        // SiteMapNodes collection.
        foreach (SiteMapNode node in childNodes) {
            ddList.Items.Add(new ListItem(node.Title, node.Url));
        }

        item.Controls.Add(ddList);
    }
}

Private Sub AddDropDownListAfterCurrentNode(item As SiteMapNodeItem)

   Dim childNodes As SiteMapNodeCollection = item.SiteMapNode.ChildNodes

   ' Only do this work if there are child nodes.
   If Not (childNodes Is Nothing) Then

      ' Add another PathSeparator after the CurrentNode.
      Dim finalSeparator As New SiteMapNodeItem(item.ItemIndex, SiteMapNodeItemType.PathSeparator)

      Dim eventArgs As New SiteMapNodeItemEventArgs(finalSeparator)

      InitializeItem(finalSeparator)
      ' Call OnItemCreated every time a SiteMapNodeItem is
      ' created and initialized.
      OnItemCreated(eventArgs)

      ' The pathSeparator does not bind to any SiteMapNode, so
      ' do not call DataBind on the SiteMapNodeItem.
      item.Controls.Add(finalSeparator)

      ' Create a DropDownList and populate it with the children of the
      ' CurrentNode. There are no styles or templates that are applied
      ' to the DropDownList control. If OnSelectedIndexChanged is raised,
      ' the event handler redirects to the page selected.
      ' The CurrentNode has child nodes.
      Dim ddList As New DropDownList()
      ddList.AutoPostBack = True

      AddHandler ddList.SelectedIndexChanged, AddressOf Me.DropDownNavPathEventHandler

      ' Add a ListItem to the DropDownList for every node in the
      ' SiteMapNodes collection.
      Dim node As SiteMapNode
      For Each node In  childNodes
         ddList.Items.Add(New ListItem(node.Title, node.Url))
      Next node

      item.Controls.Add(ddList)
   End If
End Sub

Commenti

PathDirection Se è RootToCurrent, è possibile aggiungere ogni elemento a livello più profondo della gerarchia di navigazione del Controls sito alla fine della raccolta. Tuttavia, se la PathDirection proprietà è impostata su CurrentToRoot, ogni nodo a livello più profondo deve essere inserito all'inizio della Controls raccolta.

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