CODEWITHSUNDEEP
c#wpf
zpete
zpete

Reputation: 1765

How to bind to a MenuItems Property from Control to another MenuItem in Parent View?

I got the following View of type MyCustomView:

<Grid>
...
<usercontrols:MyUsercontrol>
   <usercontrols:MyUsercontrol.ContextMenu>
       <ContextMenu>
           <ContextMenu.ItemsSource>
               <CompositeCollection>
                    <MenuItem IsEnabled="{Binding HOW_TO_BIND_TO_miTest}" Header="Test" Click="DoSomeAction" />
               </CompositeCollection>
           </ContextMenu.ItemsSource>
        </ContextMenu>
   </usercontrols:MyUsercontrol.ContextMenu>
 </usercontrols:MyUsercontrol>

...

<Button Style="{StaticResource SidebarButton}" Click="OpenContextMenu" Content="Open Menu">
   <Button.ContextMenu>
      <ContextMenu>
          <ContextMenu.ItemsSource>
              <CompositeCollection>
                 <MenuItem x:Name="miTest" Header="Add Account" Click="DoSomeAction"/>
              </CompositeCollection>
           </ContextMenu.ItemsSource>
       </ContextMenu>
   </Button.ContextMenu>
</Button>

...
</Grid>

In the Code-Behind of the View I set the IsEnabled-Property of MenuItem "miTest" to false, so the MenuItem is disabled. How do I synchronise this with the IsEnabled-Property of the embedded UserControls' Contextmenu-Item? I already tried this one:

<MenuItem IsEnabled="{Binding Path=Test_binding.IsEnabled, RelativeSource={RelativeSource AncestorType={x:Type MyCustomView}}}" Header="Test" Click="DoSomeAction" />

and added this Code-Behind:

    public MenuItem Test_binding
    {
        get { return this.miTest; }
    }

but this is not working.

Upvotes: 0

Views: 264

Answers (1)

Sankarann
Sankarann

Reputation: 2665

Have a bool Property in your UserControl, Bind it to both of the MenuItem in TwoWay.. it will be Synchronised. 

public bool IsEnabled
{
    get { return isEnabled; }
    set { 
             isEnabled = value;
             PropertyChagned("IsEnabled");
        }
}

Make sure the UserControl is derived with INotifyPropertyChagned...

Bind this property with both MenuItem...

<MenuItem IsEnabled="{Binding Path=IsEnabled, Mode=Twoway, RelativeSource={RelativeSource AncestorType={x:Type MyCustomView}}}" Header="Test" Click="DoSomeAction" />

Upvotes: 1

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