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MenuItemBindingCollection.Remove(MenuItemBinding) Method

  • Reference

Definition

Namespace:
System.Web.UI.WebControls
Assembly:
System.Web.dll

Removes the specified MenuItemBinding object from the 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)

Parameters

binding
MenuItemBinding

The MenuItemBinding to remove from the collection.

Examples

The following code example demonstrates how to use the Remove method to remove a MenuItemBinding object from the collection. 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)
    {
      // 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>

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>

Remarks

Use the Remove method to remove the specified menu item binding from the collection. All items that follow that menu item are then moved up to fill in the vacant position. The indexes of the moved items are also updated.

Note

The collection can contain null values, as well as duplicate MenuItemBinding objects.

As an alternative, you can remove a menu item from a specific index in the collection by using the RemoveAt method. You can also remove all menu items from the collection by using the Clear method.

Note

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.

Applies to

See also