Radial Menu and Passing parameter

[Ahamd]

Dear All;

 

I tried a radial menu and it's working ok, but i failed to pass parameter from a textblock value using 

CommandParameter

when i pass static text, it's working, not when using a value from the textblock

my code is

1.<TextBlock x:Name="txtTest" Canvas.Left="83" TextWrapping="Wrap" Text="Hello" Canvas.Top="19"/>
2.            <Primitives:RadRadialMenu x:Name="mnuShops" Height="108" Width="102"  RenderTransformOrigin="0.506,0.494" Canvas.Top="-126" Canvas.Left="-132" FontSize="16">
3.                <Primitives:RadialMenuItem x:Name="radialMenuItem" Header="FirstNode"  Command="{Binding FirstCommand, Source={StaticResource Commands}}" CommandParameter="{Binding Text, ElementName=txtTest}"/>
4.                <Primitives:RadialMenuItem Header="Second Node"/>
5.            </Primitives:RadRadialMenu>

[Pavel R. Pavlov]

Hi Ahamd,

You are correct. The CommandParameter does not support such kind of binding. 

Please keep in mind that the RadialMenuItem is not a DependencyObject. This means that ordinary binding will not work. 

You have two options to bind the CommandParameter property. First is to use StaticResource binding similar to this:

<Page.Resources>
    <local:CustomItemCommand x:Key="customCommand" />
    <local:ViewModel x:Key="viewModel" />
</Page.Resources>

<StackPanel Background="{ThemeResource ApplicationPageBackgroundThemeBrush}" Margin="0 40 0 0">

    <Primitives:RadRadialMenu DataContext="{StaticResource viewModel}">
        <Primitives:RadialMenuItem Header="Binding"
                                   Command="{StaticResource customCommand}"
                                   CommandParameter="{Binding Source={StaticResource viewModel}, Path=TestString}" />
    </Primitives:RadRadialMenu>
</StackPanel>

The other approach would be to use a custom attached property.

I hope this information is helpful. Do not hesitate to contact us again if you need any further assistance.

Regards,
Pavel R. Pavlov
Telerik