語言

MenuItemBindingCollection.RemoveAt(Int32) 方法

定義

將指定索引位置的物件從集合中移除 MenuItemBinding 。

public:
 void RemoveAt(int index);
public void RemoveAt(int index);
member this.RemoveAt : int -> unit
Public Sub RemoveAt (index As Integer)

參數

index
Int32

選單項目綁定的索引位置,就是要移除。

範例

以下程式碼範例示範如何使用此 RemoveAt 方法在特定索引處移除 MenuItemBinding 集合中的物件。 為了讓這個範例正確運作,你必須將下方的範例 XML 資料複製到一個名為 Map.xml的檔案中。


<%@ 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 RemoveAt method to remove the  
      // MenuItemBinding object at index 3 from
      // the Bindings collection.
      NavigationMenu.DataBindings.RemoveAt(3);
    }
  }
    
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>MenuItemBindingCollection RemoveAt Example</title>
</head>
<body>
    <form id="form1" runat="server">
    
      <h3>MenuItemBindingCollection RemoveAt 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
    
      ' Use the RemoveAt method to remove the  
      ' MenuItemBinding object at index 3 from
      ' the Bindings collection.
      NavigationMenu.DataBindings.RemoveAt(3)
    
    End If
    
  End Sub
    
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>MenuItemBindingCollection RemoveAt Example</title>
</head>
<body>
    <form id="form1" runat="server">
    
      <h3>MenuItemBindingCollection RemoveAt 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>

以下是前一個範例的現場地圖範例資料。

<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>

備註

使用 RemoveAt 該方法將指定索引位置的物件從集合中移除 MenuItemBinding 。 所有緊接該選單項目後的項目都會往上移動,填補空缺位置。 移動項目的索引也會更新。

Note

該集合可以包含空值,也可以包含重複 MenuItemBinding 的物件。

作為替代方案,你也可以使用這個MenuItemBinding方法移除特定Remove物件。 你也可以用這個 Clear 方法把所有菜單項目從收藏中移除。

適用於

另請參閱