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    copied!<p>Here is what I did to work, though I'm not particularly happy with the solution. If anyone knows a better approach, please do let me know.</p> <p>I moved the logic for the commands handler in a separate, static class:</p> <pre><code> static class CommandsCore { public static bool Save_CanExecute(ArticleControl ac) { double baseprice = 0; double.TryParse(ac.ArticleBasePrice.Text, out baseprice); return !string.IsNullOrEmpty(ac.ArticleID.Text) &amp;&amp; !string.IsNullOrEmpty(ac.ArticleName.Text) &amp;&amp; !string.IsNullOrEmpty(ac.ArticleDescription.Text) &amp;&amp; baseprice &gt; 0; } public static void Save_Executed(ArticleControl ac) { ArticleViewModel avm = (ArticleViewModel)ac.DataContext; if (avm != null &amp;&amp; avm.Save()) { ac.ArticleID.Text = String.Empty; ac.ArticleName.Text = String.Empty; ac.ArticleDescription.Text = String.Empty; ac.ArticleBasePrice.Text = String.Empty; } } } </code></pre> <p>I kept the command binding in the user control as it was</p> <pre><code> &lt;UserControl.CommandBindings&gt; &lt;CommandBinding x:Name="saveCmd" Command="local:Commands.Save" CanExecute="CommandBinding_CanExecute" Executed="CommandBinding_Executed"/&gt; &lt;/UserControl.CommandBindings&gt; </code></pre> <p>But in the handlers I called the two methods I just defined above.</p> <pre><code> public void CommandBinding_CanExecute(object sender, CanExecuteRoutedEventArgs e) { e.CanExecute = CommandsCore.Save_CanExecute(this); } public void CommandBinding_Executed(object sender, ExecutedRoutedEventArgs e) { CommandsCore.Save_Executed(this); } </code></pre> <p>And then I did the same from the window where the control is used.</p> <pre><code>&lt;Window x:Class="MVVMModel.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="clr-namespace:MVVMModel" Title="MainWindow" Height="350" Width="525"&gt; &lt;Window.CommandBindings&gt; &lt;CommandBinding x:Name="saveCmd" Command="local:Commands.Save" CanExecute="CommandBinding_CanExecute" Executed="CommandBinding_Executed"/&gt; &lt;/Window.CommandBindings&gt; &lt;StackPanel&gt; &lt;local:ArticleControl x:Name="articleControl" /&gt; &lt;Button Name="btnSave" Content="Save" Width="100" HorizontalAlignment="Left" Command="local:Commands.Save"/&gt; &lt;/StackPanel&gt; &lt;/Window&gt; </code></pre> <p>and the handlers</p> <pre><code> public void CommandBinding_CanExecute(object sender, CanExecuteRoutedEventArgs e) { e.CanExecute = CommandsCore.Save_CanExecute(articleControl); } public void CommandBinding_Executed(object sender, ExecutedRoutedEventArgs e) { CommandsCore.Save_Executed(articleControl); } </code></pre> <p>And this works, the Save button is enabled only when the fields are filled in appropriately and the command is executed correctly when clicking the button.</p>
 

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