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POEventToCommand with attached event
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  1. POEventToCommand with attached event
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    copied!<p>I use on attached event <code>Validation.Error</code> of the TextBox.</p> <p><strong><a href="http://msdn.microsoft.com/en-us/library/system.windows.controls.validation.error%28v=vs.100%29.aspx" rel="nofollow noreferrer">Validation.Error</a></strong></p> <p>I want to bind it to <code>EventToCommand</code>.</p> <p>Normally it does not work:</p> <pre><code> &lt;TextBox Height="20" Width="150" Text="{Binding MyProperty,NotifyOnValidationError=True,ValidatesOnDataErrors=True}" &gt;&lt;!--Validation.Error="TextBox_Error"--&gt; &lt;i:Interaction.Triggers&gt; &lt;i:EventTrigger EventName="Validation.Error"&gt; &lt;mvvm:EventToCommand Command="{Binding MyCmd}" PassEventArgsToCommand="True" &gt;&lt;/mvvm:EventToCommand&gt; &lt;/i:EventTrigger&gt; &lt;/i:Interaction.Triggers&gt; &lt;/TextBox&gt; </code></pre> <p>So I found a way to do it, you can see it at the link below:</p> <p><strong><a href="http://sergecalderara.wordpress.com/2012/08/23/how-to-attached-an-mvvm-eventtocommand-to-an-attached-event/" rel="nofollow noreferrer">Attached an mvvm event to command to an attached event</a></strong></p> <p>But I get an error:</p> <pre><code>RoutedEventConverter cannot convert from System.String. </code></pre> <p><img src="https://i.stack.imgur.com/741Wx.png" alt="enter image description here"></p> <p>Can anyone help?</p> <p><strong>EDIT :</strong></p> <p>My command in the <code>ViewModel</code></p> <pre><code> public MyViewModel() { MyCmd = new RelayCommand&lt;RoutedEventArgs&gt;(Valid); } public RelayCommand&lt;RoutedEventArgs&gt; MyCmd { get; set; } private void Valid(RoutedEventArgs args) { //Do something } </code></pre>
 

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