title: DataGridComboBoxColumn cell not displaying selected item text?
body: <p>I was wondering how you get the DataGridComboBoxColumn to display the selected item text when it is not in editing mode? And also is it possible to make it so the combo box in edit mode displays the selected item text initially?</p>
  
  <p>Here is my XAML:</p>
  
  <pre><code>&lt;DataGridComboBoxColumn Header="Formatter" 
                          SelectedItemBinding="{Binding Path=Format}"&gt;
    &lt;DataGridComboBoxColumn.ElementStyle&gt;
      &lt;Style TargetType=""&gt;
        &lt;Setter Property="Text" Value="{Binding Path=FormatView.Name}" /&gt;
      &lt;/Style&gt;
    &lt;/DataGridComboBoxColumn.ElementStyle&gt;
    &lt;DataGridComboBoxColumn.EditingElementStyle&gt;
      &lt;Style TargetType="ComboBox"&gt;
        &lt;Setter Property="ItemsSource" Value="{Binding Path=DefinedFormatters}" /&gt;
        &lt;Setter Property="IsDropDownOpen" Value="True" /&gt;
        &lt;Setter Property="ItemTemplate"&gt;
          &lt;Setter.Value&gt;
            &lt;DataTemplate&gt;
              &lt;TextBlock Text="{Binding Path=Name}"&gt;&lt;/TextBlock&gt;
            &lt;/DataTemplate&gt;
          &lt;/Setter.Value&gt;
        &lt;/Setter&gt;
      &lt;/Style&gt;
    &lt;/DataGridComboBoxColumn.EditingElementStyle&gt;
  &lt;/DataGridComboBoxColumn&gt;
  </code></pre>