MenuItem.Value Property
Assembly: System.Web (in system.web.dll)
The Value property is used to supplement the Text property by storing any additional data associated with the menu item. This value is not displayed in the control and is commonly used to store data for handling postback events.
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| If the Value property contains a null reference (Nothing in Visual Basic), the get accessor returns the value of the Text property. If the Text property, in turn, contains a null reference (Nothing in Visual Basic), Empty is returned. |
The value of the Value property is also used when the value path specified in the ValuePath property is generated. A value path is a delimiter-separated list of menu item values that forms a path from the root menu item to the current menu item. The value path is used to indicate the position of a menu item in a Menu control.
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| Menu items at the same menu level must each have a unique value for the Value property; the Menu control cannot distinguish between different menu items at the same level that have the same value. |
The value of this property, when set, can be saved automatically to a resource file by using a designer tool. For more information, see LocalizableAttribute and ASP.NET Globalization and Localization.
The following code example demonstrates how to display the Value for a menu item and its parent when the user selects a menu item.
<%@ Page Language="C#" %> <script runat="server"> void NavigationMenu_MenuItemClick(Object sender, MenuEventArgs e) { // Display the selected menu item. if (e.Item.Parent != null) { Message.Text = "You selected " + e.Item.Value + " from " + e.Item.Parent.Value + "."; } else { Message.Text = "You selected " + e.Item.Value + "."; } } </script> <html> <body> <form runat="server"> <h3>MenuItem Value Example</h3> Select an item from the menu:<br/><br/> <asp:menu id="NavigationMenu" staticdisplaylevels="1" staticsubmenuindent="10" orientation="Vertical" onmenuitemclick="NavigationMenu_MenuItemClick" runat="server"> <dynamicselectedstyle backcolor="yellow"/> <staticselectedstyle backcolor="yellow"/> <items> <asp:menuitem text="Home" tooltip="Home"> <asp:menuitem text="Category" value="Category 1" tooltip="Category 1"> <asp:menuitem text="Topic" value="Topic 1" tooltip="Topic 1"/> <asp:menuitem text="Topic" value="Topic 2" tooltip="Topic 2"/> <asp:menuitem text="Topic" value="Topic 3" tooltip="Topic 3"/> </asp:menuitem> <asp:menuitem text="Category" value="Category 2" tooltip="Category 2"> <asp:menuitem text="Topic" value="Topic 1" tooltip="Topic 1"/> <asp:menuitem text="Topic" value="Topic 2" tooltip="Topic 2"/> <asp:menuitem text="Topic" value="Topic 3" tooltip="Topic 3"/> </asp:menuitem> </asp:menuitem> </items> </asp:menu> <hr/> <asp:label id="Message" runat="server"/> </form> </body> </html>
Windows 98, Windows 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.
