Hide Context Menu Server-side Code in UI for ASP.NET AJAX TreeView

JustinWong

147 posts

Member since:
Mar 2007

Posted 14 Nov 2009 Link to this post

Hi:

I'm wondering if there is a way to hide the context menu using server-side code. Specifically, If a user is logged in, then when the page loads, they can right-click and see the context menu. If the user is not logged in, then right-clicking on a node won't do anything.

The context menu is already built at design time. I don't want to re-build the menu at runtime.

Any help on how to ahcieve this is appreciated!

Thanks!

Shinu

17764 posts

Member since:
Mar 2007

Posted 17 Nov 2009 Link to this post

Hi JustinWong,

One suggestion to achieve this behaviour is setting a HiddenField value (from code) based on whether user has logged in or not and canceling the 'OnClientContextMenuShowing' event after checking the HiddenField value in order to prevent the menu to appear.

Here is the example:

    
            <telerik:RadTreeView ID="RadTreeView1" runat="server" OnClientContextMenuShowing="OnClientContextMenuShowing"> 
        
                            <ContextMenus> 
        
                                <telerik:RadTreeViewContextMenu ID="MainContextMenu" 
        
                                    runat="server"> 
        
                                    <Items> 
        
                                       . . . 
        
                                    </Items> 
        
                                </telerik:RadTreeViewContextMenu> 
        
                            </ContextMenus> 
        
                            <Nodes> 
        
                             . . . 
        
                            </Nodes> 
        
                        </telerik:RadTreeView> 
        
            <script type="text/javascript"> 
        
            function OnClientContextMenuShowing(sender, args) 
        
            { 
        
                if(check) // Check whether the hiddenfield value is set from code 
        
                args.set_cancel(true);  // Cancel the event which prevent te menu to appear 
        
            } 
        
            </script>

Regards,
Shinu.

JustinWong

147 posts

Member since:
Mar 2007

Posted 18 Nov 2009 Link to this post

Thanks Shinu. That's what I ended up doing - although I would prefer that there be methods to show/hide contextmenu on a per-node basis.

Cheers!

Justin