how to disable RadContextMenu RadMenuItems at runtime MVVM

[Randy Hompesch]

Hi,

I have a treeview that uses the datatemplate shown below. It has a context menu. I'd like to be able to disable or hide certain items depending on which node in the tree they click on. Is this possible? If so, can someone share some example code of how to do this in an MVVM fashion?

Thanks ... Ed

 

 

<HierarchicalDataTemplate DataType ="{x:Type vm:AttachmentContainer}"  ItemsSource="{Binding Children}">
    <TextBlock Text="{Binding Name}" >
           <telerik:RadContextMenu.ContextMenu>
                <telerik:RadContextMenu  Opened="tv_ContextMenuOpened" >
                    <telerik:RadMenuItem x:Name="icon" Header="Upload File"   >
                        <telerik:RadMenuItem.Icon><Image Source="/Images/Upload.png"/></telerik:RadMenuItem.Icon>
                    </telerik:RadMenuItem>
                     <telerik:RadMenuItem Header="New Folder" >
                        <telerik:RadMenuItem.Icon>
                            <Image Source="/Images/NewFolder.png"/>
                        </telerik:RadMenuItem.Icon>
                     </telerik:RadMenuItem>
                     <telerik:RadMenuItem Header="Delete Folder" >
                        <telerik:RadMenuItem.Icon>
                            <Image Source="/Images/DeleteSmall.png"/>
                        </telerik:RadMenuItem.Icon>
                     </telerik:RadMenuItem>
                </telerik:RadContextMenu>
            </telerik:RadContextMenu.ContextMenu>
    </TextBlock>
</HierarchicalDataTemplate>

[Dilyan Traykov]

Hello Ed,

Could you please have a look at the Custom Context Menu demo from the WPF Controls Samples as I believe it demonstrates a behavior similar to the one you're looking for?

You can introduce a new IsEnabled property to the SolutionItem class and use that in the PreapreContextOperationsForItem method and contextMenuItemStyle to have certain items disabled in a given context.

Do let me know if you need any help in implementing this.

Regards,
Dilyan Traykov
Telerik by Progress

[Randy Hompesch]

Thanks so much!