MenuItemCollection.IndexOf Method (MenuItem)
.NET Framework (current version)
Determines the index of the specified MenuItem object in the collection.
Assembly: System.Web (in System.Web.dll)
Parameters
- value
-
Type:
System.Web.UI.WebControls.MenuItem
The MenuItem to locate.
Return Value
Type: System.Int32The zero-based index of the first occurrence of value within the current MenuItemCollection, if found; otherwise, -1.
Use the IndexOf method to determine the index of the specified MenuItem object in the current MenuItemCollection object. If the menu item is not in the collection, the method returns -1.
Note |
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If the specified menu item appears multiple times in the collection, the index of the first occurrence is returned. |
The following code example demonstrates how to use the IndexOf method to determine the index of a MenuItem object within a MenuItemCollection object.
<%@ 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 NavigationMenu_MenuItemClick(ByVal sender As Object, ByVal e As MenuEventArgs) ' Retrieve the parent menu item of the selected menu item. Dim parent As MenuItem = e.Item.Parent ' Determine whether the selected menu item is a ' root menu item. Root menu items are stored in ' a Menu control's Items collection. Other menu ' items are stored in the parent menu item's ' ChildItems collection. If parent IsNot Nothing Then Message.Text = "The " & e.Item.Text & _ " menu item has an index of " & _ parent.ChildItems.IndexOf(e.Item).ToString() & _ " in the parent menu item's ChildItems collection." Else Message.Text = "The " & e.Item.Text & _ " menu item has an index of " & _ NavigationMenu.Items.IndexOf(e.Item).ToString() & _ " in the Menu control's Items collection." End If End Sub </script> <html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server"> <title>MenuItemCollection IndexOf Example</title> </head> <body> <form id="form1" runat="server"> <h3>MenuItemCollection IndexOf Example</h3> Select an item from the menu. <br/><br/> <asp:menu id="NavigationMenu" orientation="Vertical" target="_blank" onmenuitemclick="NavigationMenu_MenuItemClick" 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/> <asp:label id="Message" runat="server"/> </form> </body> </html>
.NET Framework
Available since 2.0
Available since 2.0
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