SiteMapNodeItem(Int32, SiteMapNodeItemType) Konstruktor

  • Reference

Definice

Obor názvů:
System.Web.UI.WebControls
Sestavení:
System.Web.dll

Inicializuje novou instanci SiteMapNodeItem třídy pomocí zadaného indexu a SiteMapNodeItemType.

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)

Parametry

itemIndex
Int32

Index v kolekci Controls , kterou SiteMapPath ovládací prvek používá ke sledování objektu SiteMapNodeItem .

itemType
SiteMapNodeItemType

Funkční typ SiteMapNode , který to SiteMapNodeItem představuje.

Příklady

Následující příklad kódu ukazuje, jak vytvořit SiteMapNodeItem objekt. Tento příklad kódu je součástí většího příkladu poskytnutého SiteMapPath pro třídu.

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

Poznámky

PathDirection Pokud anoRootToCurrent, můžete na konec Controls kolekce přidat každou položku navigace na vyšší úrovni hierarchie webu. Pokud je však vlastnost nastavena PathDirection na CurrentToRoot, musí být každý uzel na hlubší úrovni vložen na začátku Controls kolekce.

Platí pro

Viz také