title: WPF: Problem with Checkbox when binding datatrigger to property "Ischecked"
body: <p>I have a checkbox in GridViewColumn which i use for show/change database value. The click event for the checkbox is used for change value in the database. For handling the state of property "IsChecked" I'm using datatrigger and a setter, se xaml code below:</p>
  
  <pre><code>&lt;Style TargetType="CheckBox"&gt;
      &lt;Setter Property="IsEnabled" Value="True" /&gt;
      &lt;Style.Triggers&gt;
          &lt;DataTrigger Binding="{Binding Path=ID, Converter={StaticResource Converter}}"   Value="true"&gt;
              &lt;Setter Property="IsChecked" Value="True"/&gt;
          &lt;/DataTrigger&gt;
      &lt;/Style.Triggers&gt;
  &lt;/Style&gt;
  </code></pre>
  
  <p>The binding works great until I click the checkbox. After I clicked the checkbox for the first time the state of the property "IsChecked" don't updates if a manually in the Database change the value which i mapped to the property "IsChecked". 
  If I map for example the same value to the property "Content" of the checkbox the trigger works fine even after I've clicked the checkbox. </p>
  
  <p>Does anyone no whats the problem is?</p>