title: Filling a ComboBox in the DataForm with a DomainDataSource
body: <p>Here is my layout:</p>
  
  <pre><code>&lt;StackPanel&gt;
      &lt;!-- Defining my DDS here wont allow my ComboBox inside the DataTemplate bind to the loaded items --&gt;
      &lt;DomainDataSource x:Name="ddsValues" Query="MyQuery" DomainContext="{Binding DC}" /&gt;
      &lt;DataForm&gt;
          &lt;DataForm.EditTemplate&gt;
              &lt;DataTemplate&gt;
                  &lt;StackPanel&gt;
                      &lt;!-- Defining my DDS here works fine --&gt;
                      &lt;DomainDataSource x:Name="ddsValues" Query="MyQuery" DomainContext="{Binding DC}" /&gt;
                      &lt;ComboBox ItemsSource="{Binding Data, ElementName=ddsValues}" /&gt;
                  &lt;/StackPanel&gt;
              &lt;/DataTemplate&gt;
          &lt;/DataForm.EditTemplate&gt;
      &lt;/DataForm&gt;
  &lt;/StackPanel&gt;
  </code></pre>
  
  <p>Can anyone tell me why I have to setup my DomainDataSource this way? Why does it have to live inside the DataTemplate? Is there a way around this? Technically this means that EVERYTIME I change the record on the DataForm it has to RELOAD the values from the database. These values are static and wont change.</p>