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POHow can I bind a control's command to a child viewmodel command in an MVVM scenario?
 

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  1. POHow can I bind a control's command to a child viewmodel command in an MVVM scenario?
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    <p>I have a window in WPF based upon a viewmodel. The viewmodel includes a child viewmodel that can be switched at runtime. Each child viewmodel has its own commands. The parent view contains a ribbon with buttons that need to bind to the current child viewmodels commands. To switch views I use a content control in the parent view that uses data templates. Each possible child view is a user control that binds to the appropriate viewmodel (that bit works).</p> <pre><code> &lt;!-- Switchable area --&gt; &lt;ContentControl Content="{Binding ChildViewModel}"&gt; &lt;ContentControl.Resources&gt; &lt;DataTemplate DataType="{x:Type vm:VersionsViewModel}"&gt; &lt;embeddable:VersionsView /&gt; &lt;/DataTemplate&gt; &lt;DataTemplate DataType="{x:Type vm:LockListViewModel}"&gt; &lt;embeddable:LockListView /&gt; &lt;/DataTemplate&gt; &lt;/ContentControl.Resources&gt; &lt;/ContentControl&gt; </code></pre> <p>So for example, one of my child viewmodels has a refresh command. I want this to appear in the main view in a ribbon button. I've tried setting the binding to the following XAML but it never binds so the command isn't called. What am I doing wrong?</p> <pre><code>&lt;telerik:RadRibbonButton Size="Large" Text="Refresh" LargeImage="..\Images\Ribbon\32x32\Refresh.png" Command="{Binding ChildView.RefreshCommand}" telerik:KeyTipService.AccessText="R"/&gt; </code></pre> <p>Elsewhere in the main view I have bindings for data that comes from the child viewmodel and works fine so I'm really confused! For example, this is the binding I use to get the title for the window.</p> <pre><code>Title="{Binding ChildViewModel.Title,FallbackValue='My System'}" </code></pre>
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    1. USR-C
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      1. VTUpMod
    1. COThe binding of the RibbonButtons Command-property has the Path `ChildView.`... against what the binding of your Title-property has the Path `ChildViewModel.`...
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      1. POHow can I bind a control's command to a child viewmodel command in an MVVM scenario?
      1. USFlorian Gl
    2. COat least you can check the datacontext for your ribbon with Snoop to see what the actual datacontext for your ribbon is.
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      1. POHow can I bind a control's command to a child viewmodel command in an MVVM scenario?
      1. USblindmeis
 

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