BeforeClientContextMenu is not firing

[Xavier]

Hi,
I am using a radtreeview in my project, earlier it had a context menu ,i need to show/hide the context menu for some particular nodes.
My nodes are dynamically loading from DB.

I implementing a radtree context menu like below.

<telerik:RadTreeView ID="rtvHierarchy" runat="server"             
            OnNodeExpand="rtvhierarchy_NodeExpand" MultipleSelect="True" Skin="Vista" 
            EnableDragAndDrop="True" OnNodeDrop="hierarchy_NodeDrop" 
            AllowNodeEditing="True" 
            BeforeClientContextMenu= "ShowContext"
            OnContextMenuItemClick="rtvhierarchy_ContextMenuItemClick" 
                        OnNodeEdit="rtvhierarchy_NodeEdit" 
            Font-Names="Arial,Times New Roman,Microsoft Sans Serif" 
            Font-Size="X-Small" Height="522px">
        <ContextMenus>
                    <telerik:RadTreeViewContextMenu Skin="Outlook" ID="MainContextMenu" runat="server">
                        <Items>
                            <telerik:RadMenuItem Value="New" Text="Create New Value" runat="server"></telerik:RadMenuItem>
                            <telerik:RadMenuItem Value="Rename" Text="Rename Node" runat="server"></telerik:RadMenuItem>  
                            <telerik:RadMenuItem Value="Cut" Text="Cut" runat="server"></telerik:RadMenuItem>
                            <telerik:RadMenuItem Value="Paste" Text="Paste" runat="server"></telerik:RadMenuItem>                           
                        </Items>
                        <CollapseAnimation Duration="200" Type="OutQuint" />
                    </telerik:RadTreeViewContextMenu>                                    
         </ContextMenus>         
        </telerik:RadTreeView>

I want to enable "Create New Value" and "Rename Node" on node level and Cut and Paste is on item level, i try to implement this like below,

BeforeClientContextMenu= "ShowContext" is a event which will fire before the context menu loads.

function ShowContext(node, e) {

       

             if (node.Category == "item")

            {

                var menuItem = MainContextMenu.FindItemByText("Create New Value");

                menuItem.Disable();

                var menuItem1 = MainContextMenu.FindItemByText("Rename Node");

                menuItem1.Disable();

            }

             else

            {

                var menuItem = MainContextMenu.FindItemByText("Cut");

                menuItem.Disable();

                var menuItem1 = MainContextMenu.FindItemByText("Paste");

                menuItem1.Disable();

            }

             return false;

        }
 
 The problem is the BeforeClientContextMenu is not firing the "ShowContext" function.

Please help me.

Note: I am only refereing the teleric.web.UI dll in my project solution, i am not installed telerik it in my machine.

Regards,
Xavier
 

[Princy]

Hello Xavier,

You can use the client event OnClientContextMenuShowing which worked as expected. Take a look at the following help documentation which explains more about this.
Migrating from RadTreeView for ASP.NET to ASP.NET AJAX

Thanks,
Princy.

[Xavier]

Thanks Princy,

I tried OnClientContextMenuShowing , its trigering now

The problem is i want to do a search inside the context menu for enable/ disable menu items accordingly, what is the code to search that.

Regards,
Xavier

[Plamen]

Hello Xavier,

You can consult with the Context menu demo, where a similar functionality is described

Hope this will help.

Greetings,
Plamen Zdravkov
the Telerik team