MenuItem.Depth Propriété
Définition
Important
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Obtient le niveau auquel un élément de menu s'affiche.
public:
property int Depth { int get(); };[System.ComponentModel.Browsable(false)]
public int Depth { get; }[<System.ComponentModel.Browsable(false)>]
member this.Depth : intPublic ReadOnly Property Depth As IntegerValeur de propriété
Niveau auquel un élément de menu s'affiche.
- Attributs
Exemples
L’exemple suivant montre comment utiliser la Depth propriété pour déterminer la profondeur d’un élément de menu.
<%@ 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 the Menu control contains any root nodes, perform a
// preorder traversal of the tree and display the text of
// nodes with a depth of 2.
if (NavigationMenu.Items.Count > 0)
{
// Iterate through the root menu items in the Items collection.
foreach (MenuItem item in NavigationMenu.Items)
{
DisplayChildMenuText(item);
}
}
else
{
Message.Text = "The Menu control does not have any items.";
}
}
void DisplayChildMenuText(MenuItem item)
{
// Use the Depth property to determine the depth of a
// menu item. Display only items with a depth of 2.
if (item.Depth == 2)
{
Message.Text += item.Text + "<br />";
}
// Iterate through the child menu items of the parent menu item
// passed into this method, and display their values.
foreach (MenuItem childItem in item.ChildItems)
{
// Recursively call the DisplayChildMenuText method to
// traverse the tree.
DisplayChildMenuText(childItem);
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>MenuItem Depth Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>MenuItem Depth Example</h3>
<asp:menu id="NavigationMenu"
staticdisplaylevels="2"
staticsubmenuindent="10"
orientation="Vertical"
runat="server">
<items>
<asp:menuitem text="Home"
tooltip="Home">
<asp:menuitem text="Music"
tooltip="Music">
<asp:menuitem text="Classical"
tooltip="Classical"/>
<asp:menuitem text="Rock"
tooltip="Rock"/>
<asp:menuitem text="Jazz"
tooltip="Jazz"/>
</asp:menuitem>
<asp:menuitem text="Movies"
tooltip="Movies">
<asp:menuitem text="Action"
tooltip="Action"/>
<asp:menuitem text="Drama"
tooltip="Drama"/>
<asp:menuitem text="Musical"
tooltip="Musical"/>
</asp:menuitem>
</asp:menuitem>
</items>
</asp:menu>
<hr/>
Menu items with a depth of 2:<br/><br/>
<asp:label id="Message"
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 the Menu control contains any root menu items, perform a
' preorder traversal of the tree and display the text of
' menu items with a depth of 2.
If NavigationMenu.Items.Count > 0 Then
' Iterate through the root menu items in the Items collection.
Dim item As MenuItem
For Each item In NavigationMenu.Items
DisplayChildMenuText(item)
Next
Else
Message.Text = "The Menu control does not have any items."
End If
End Sub
Sub DisplayChildMenuText(ByVal item As MenuItem)
' Use the Depth property to determine the depth of a
' menu item. Display only items with a depth of 2.
If item.Depth = 2 Then
Message.Text += item.Text + "<br />"
End If
' Iterate through the child menu items of the parent menu item
' passed into this method, and display their values.
Dim childItem As MenuItem
For Each childItem In item.ChildItems
' Recursively call the DisplayChildMenuText method to
' traverse the tree.
DisplayChildMenuText(childItem)
Next
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>MenuItem Depth Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>MenuItem Depth Example</h3>
<asp:menu id="NavigationMenu"
staticdisplaylevels="2"
staticsubmenuindent="10"
orientation="Vertical"
runat="server">
<items>
<asp:menuitem text="Home"
tooltip="Home">
<asp:menuitem text="Music"
tooltip="Music">
<asp:menuitem text="Classical"
tooltip="Classical"/>
<asp:menuitem text="Rock"
tooltip="Rock"/>
<asp:menuitem text="Jazz"
tooltip="Jazz"/>
</asp:menuitem>
<asp:menuitem text="Movies"
tooltip="Movies">
<asp:menuitem text="Action"
tooltip="Action"/>
<asp:menuitem text="Drama"
tooltip="Drama"/>
<asp:menuitem text="Musical"
tooltip="Musical"/>
</asp:menuitem>
</asp:menuitem>
</items>
</asp:menu>
<hr/>
Menu items with a depth of 2:<br/><br/>
<asp:label id="Message"
runat="server"/>
</form>
</body>
</html>
Remarques
Utilisez la Depth propriété pour déterminer la profondeur de l’élément de menu. La profondeur indique le niveau auquel un élément de menu est affiché et représente le nombre de niveaux de hiérarchie entre l’élément de menu actif et l’élément de menu racine. Par exemple, un élément de menu racine a une profondeur de 0. Un sous-menu de l’élément de menu racine a une profondeur de 1, et ainsi de suite.