MenuItemBindingCollection.IndexOf(MenuItemBinding) Methode

Definition

Bestimmt den Index des angegebenen MenuItemBinding-Objekts in der Auflistung.Determines the index of the specified MenuItemBinding object in the collection.

public:
 int IndexOf(System::Web::UI::WebControls::MenuItemBinding ^ value);
public int IndexOf (System.Web.UI.WebControls.MenuItemBinding value);
member this.IndexOf : System.Web.UI.WebControls.MenuItemBinding -> int
Public Function IndexOf (value As MenuItemBinding) As Integer

Parameter

value
MenuItemBinding

Das MenuItemBinding, dessen Index bestimmt werden soll.The MenuItemBinding to determine the index of.

Gibt zurück

Der nullbasierte Index des ersten Vorkommens des value in der Auflistung, sofern gefunden, andernfalls -1.The zero-based index of the first occurrence of value within the collection, if found; otherwise, -1.

Beispiele

Im folgenden Codebeispiel wird veranschaulicht, wie die IndexOf -Methode verwendet wird, um den MenuItemBinding Index eines-Objekts in der-Auflistung zu bestimmen.The following code example demonstrates how to use the IndexOf method to determine the index of a MenuItemBinding object in the collection. Damit dieses Beispiel ordnungsgemäß funktioniert, müssen Sie die folgenden XML-Beispiel Daten in eine Datei mit dem Namen "map. xml" kopieren.For this example to work correctly, you must copy the sample XML data below to a file named Map.xml.


<%@ 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)
    {
        // Use the indexer to retrieve the MenuItemBinding
        // object at index 2.
        MenuItemBinding binding = NavigationMenu.DataBindings[2];
      int index = NavigationMenu.DataBindings.IndexOf(binding);
      Message.Text = "The MenuItemBinding object that is applied " +
        "to the menu items at depth 2 is contained in the Bindings " + 
        "collection at index " + index.ToString() + ".";
    }
  }
      
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>MenuItemBindingCollection IndexOf Example</title>
</head>
<body>
    <form id="form1" runat="server">
    
      <h3>MenuItemBindingCollection IndexOf Example</h3>
    
      <asp:menu id="NavigationMenu"
        staticdisplaylevels="2"
        staticsubmenuindent="10" 
        orientation="Vertical"
        target="_blank"
        datasourceid="MenuSource"
        runat="server">
        
        <DataBindings>
          <asp:menuitembinding datamember="MapHomeNode" 
            depth="0"
            textfield="title" 
            navigateurlfield="url"/>
          <asp:menuitembinding datamember="MapNode" 
            depth="1"
            textfield="title" 
            navigateurlfield="url"/>
          <asp:menuitembinding datamember="MapNode" 
            depth="2"
            textfield="title" 
            navigateurlfield="url"/>
        </DataBindings>
                
      </asp:menu>
      
      <hr/>
      
      <asp:label id="Message" 
        runat="server"/>
      
      <asp:xmldatasource id="MenuSource"
        datafile="Map.xml"
        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 Page_Load(ByVal sender As Object, ByVal e As EventArgs)
  
    If Not IsPostBack Then
    
      ' Use the indexer to retrieve the MenuItemBinding
      ' object at index 2.
      Dim binding As MenuItemBinding = NavigationMenu.DataBindings(2)

      Dim index As Integer = NavigationMenu.DataBindings.IndexOf(binding)
      Message.Text = "The MenuItemBinding object that is applied " & _
        "to the menu items at depth 2 is contained in the Bindings " & _
        "collection at index " & index.ToString() & "."
    
    End If
    
  End Sub
    
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>MenuItemBindingCollection IndexOf Example</title>
</head>
<body>
    <form id="Form1" runat="server">
    
      <h3>MenuItemBindingCollection IndexOf Example</h3>
    
      <asp:menu id="NavigationMenu"
        staticdisplaylevels="2"
        staticsubmenuindent="10" 
        orientation="Vertical"
        target="_blank"
        datasourceid="MenuSource"
        runat="server">
        
        <DataBindings>
          <asp:menuitembinding datamember="MapHomeNode" 
            depth="0"
            textfield="title" 
            navigateurlfield="url"/>
          <asp:menuitembinding datamember="MapNode" 
            depth="1"
            textfield="title" 
            navigateurlfield="url"/>
          <asp:menuitembinding datamember="MapNode" 
            depth="2"
            textfield="title" 
            navigateurlfield="url"/>
        </DataBindings>
                
      </asp:menu>
      
      <hr/>
      
      <asp:label id="Message" 
        runat="server"/>
      
      <asp:xmldatasource id="MenuSource"
        datafile="Map.xml"
        runat="server"/>        

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

Im folgenden finden Sie Beispiele für Site Übersichts Daten für das vorherige Beispiel.The following is sample site map data for the previous example.

<MapHomeNode url="~\Home.aspx"

title="Home"

description="Home">

<MapNode url="~\Music.aspx"

title="Music"

description="Music">

<MapNode url="~\Classical.aspx"

title="Classical"

description="Classical"/>

<MapNode url="~\Rock.aspx"

title="Rock"

description="Rock"/>

<MapNode url="~\Jazz.aspx"

title="Jazz"

description="Jazz"/>

</MapNode>

<MapNode url="~\Movies.aspx"

title="Movies"

description="Movies">

<MapNode url="~\Action.aspx"

title="Action"

description="Action"/>

<MapNode url="~\Drama.aspx"

title="Drama"

description="Drama"/>

<MapNode url="~\Musical.aspx"

title="Musical"

description="Musical"/>

</MapNode>

</MapHomeNode>

Hinweise

Verwenden Sie IndexOf die-Methode, um den Index des MenuItemBinding angegebenen Objekts in der Auflistung zu bestimmen.Use the IndexOf method to determine the index of the specified MenuItemBinding object in the collection.

Hinweis

Die Reihenfolge, MenuItemBinding in der Objekte in der Auflistung angezeigt werden, wirkt sich nicht darauf aus, wie diese Objekte auf die Menu Menü Elemente in einem-Steuerelement angewendet werden.The order in which MenuItemBinding objects appear in the collection has no effect on how those objects are applied to the menu items in a Menu control.

Wenn sich die Menü Element Bindung nicht in der Auflistung befindet, gibt die Methode-1 zurück.If the menu item binding is not in the collection, the method returns -1.

Hinweis

Wenn die angegebene Menü Element Bindung mehrmals in der Auflistung angezeigt wird, wird der Index des ersten Vorkommens zurückgegeben.If the specified menu item binding appears multiple times in the collection, the index of the first occurrence is returned.

Gilt für:

Siehe auch