MenuItemBindingCollection.Remove(MenuItemBinding) Méthode

  • Référence

Définition

Espace de noms:
System.Web.UI.WebControls
Assembly:
System.Web.dll

Supprime l'objet MenuItemBinding spécifié de la collection.

public:
 void Remove(System::Web::UI::WebControls::MenuItemBinding ^ binding);
public void Remove (System.Web.UI.WebControls.MenuItemBinding binding);
member this.Remove : System.Web.UI.WebControls.MenuItemBinding -> unit
Public Sub Remove (binding As MenuItemBinding)

Paramètres

binding
MenuItemBinding

MenuItemBinding à supprimer de la collection.

Exemples

L’exemple de code suivant montre comment utiliser la Remove méthode pour supprimer un MenuItemBinding objet de la collection. Pour que cet exemple fonctionne correctement, vous devez copier les exemples de données XML ci-dessous dans un fichier nommé 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)
    {
      // Create the menu item bindings for the Menu control.
      MenuItemBinding binding;
      
      binding = CreateMenuItemBinding("MapHomeNode", 0, "title", "url");
      NavigationMenu.DataBindings.Add(binding);

      binding = CreateMenuItemBinding("MapNode", 1, "title", "url");
      NavigationMenu.DataBindings.Add(binding);

      binding = CreateMenuItemBinding("MapNode", 2, "title", "url");
      NavigationMenu.DataBindings.Add(binding);
        
      // Use the Remove method to remove the last MenuItemBinding 
      // object.
        NavigationMenu.DataBindings.Remove(binding);

    }
  }

  // This is a helper method to create a MenuItemBinding 
  // object from the specified parameters.
  MenuItemBinding CreateMenuItemBinding(String dataMember, int depth, String textField, String navigateUrlField)
  {
    // Create a new MenuItemBinding object.
    MenuItemBinding binding = new MenuItemBinding();

    // Set the properties of the MenuItemBinding object.
    binding.DataMember = dataMember;
    binding.Depth = depth;
    binding.TextField = textField;
    binding.NavigateUrlField = navigateUrlField;

    return binding;
  }
    
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>MenuItemBindingCollection Remove Example</title>
</head>
<body>
    <form id="form1" runat="server">
    
      <h3>MenuItemBindingCollection Remove 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"/>
          <asp:menuitembinding datamember="ExtraMapNode" 
            depth="3"
            textfield="title" 
            navigateurlfield="url"/>
        </DataBindings>
                
      </asp:menu>
      
      <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
    
            ' Create the menu item bindings for the Menu control.
            Dim binding As MenuItemBinding
      
            binding = CreateMenuItemBinding("MapHomeNode", 0, "title", "url")
            NavigationMenu.DataBindings.Add(binding)

            binding = CreateMenuItemBinding("MapNode", 1, "title", "url")
            NavigationMenu.DataBindings.Add(binding)

            binding = CreateMenuItemBinding("MapNode", 2, "title", "url")
            NavigationMenu.DataBindings.Add(binding)
            
            ' Use the Remove method to remove the MenuItemBinding 
            ' object.
            NavigationMenu.DataBindings.Remove(binding)
   
        End If
    
    End Sub

    ' This is a helper method to create a MenuItemBinding 
    ' object from the specified parameters.
    Function CreateMenuItemBinding(ByVal dataMember As String, ByVal depth As Integer, ByVal textField As String, ByVal navigateUrlField As String) As MenuItemBinding
  
        ' Create a new MenuItemBinding object.
        Dim binding As New MenuItemBinding()

        ' Set the properties of the MenuItemBinding object.
        binding.DataMember = dataMember
        binding.Depth = depth
        binding.TextField = textField
        binding.NavigateUrlField = navigateUrlField

        Return binding
    
    End Function
    
    
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>MenuItemBindingCollection Remove Example</title>
</head>
<body>
    <form id="form1" runat="server">
    
      <h3>MenuItemBindingCollection Remove 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"/>
          <asp:menuitembinding datamember="ExtraMapNode" 
            depth="3"
            textfield="title" 
            navigateurlfield="url"/>
        </DataBindings>
                
      </asp:menu>
      
      <asp:xmldatasource id="MenuSource"
        datafile="Map.xml"
        runat="server"/>        

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

Voici des exemples de données de plan de site pour l’exemple précédent.

<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>

Remarques

Utilisez la Remove méthode pour supprimer la liaison d’élément de menu spécifiée de la collection. Tous les éléments qui suivent cet élément de menu sont ensuite déplacés vers le haut pour remplir la position vacante. Les index des éléments déplacés sont également mis à jour.

Notes

La collection peut contenir des valeurs Null, ainsi que des objets en double MenuItemBinding .

Vous pouvez également supprimer un élément de menu d’un index spécifique dans la collection à l’aide de la RemoveAt méthode . Vous pouvez également supprimer tous les éléments de menu de la collection à l’aide de la Clear méthode .

Notes

L’ordre dans lequel MenuItemBinding les objets apparaissent dans la collection n’a aucun effet sur la façon dont ces objets sont appliqués aux éléments de menu d’un Menu contrôle.

S’applique à

Voir aussi