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    copied!<p>I got the same problem before, and I solve it with this (<a href="https://stackoverflow.com/questions/1314560/notify-datatemplateselector-about-the-change">Notify DataTemplateSelector about the change</a>) hint.</p> <p>My problem was, I want a ContentPresenter which changes embedded UserControl when the ComboBox selection changed.</p> <p>The Combobox+ContentPresenter XAML is</p> <pre><code> &lt;ComboBox Name="comboBoxControl" Grid.Row="1" Grid.Column="1" SelectionChanged="comboBox_SelectionChanged"&gt; &lt;i:Interaction.Triggers&gt; &lt;i:EventTrigger EventName="SelectionChanged"&gt; &lt;cmd:EventToCommand Command="{Binding Path=ChangeControlCommand, Mode=OneWay}" CommandParameter="{Binding Path=SelectedItem.Content, ElementName=comboBoxControlType}" /&gt; &lt;/i:EventTrigger&gt; &lt;/i:Interaction.Triggers&gt; &lt;ComboBoxItem&gt;UserControl-1-&lt;/ComboBoxItem&gt; &lt;ComboBoxItem&gt;UserControl-2-&lt;/ComboBoxItem&gt; &lt;/ComboBox&gt; &lt;ContentPresenter Name="contentPresenter" ContentTemplateSelector="{Binding Source={StaticResource controlCueTemplateSelector}}" Content="{Binding}" /&gt; </code></pre> <p>As you can see, the command binding with MVVM manner was my approach. Although you might not want to write a code-behind, kindly write a code-behind with appropriate event as below.</p> <pre><code> private void comboBox_SelectionChanged(object sender, SelectionChangedEventArgs e) { var content = contentPresenter.Content; contentPresenter.ClearValue(ContentPresenter.ContentProperty); contentPresenter.SetValue(ContentPresenter.ContentProperty, content); } </code></pre> <p>Bottomline is, you need to reset the binded target object (in my case, the Content property).</p>
 

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