title: WPF DataGrid cell binded on a parent property
body: <p>I have a DataGrid that has the ItemSource property binded to a propery from my model.and i want to have a combobox column in the grid binded also to a property form the same model, not inside the property object that is binded on ItemSource</p>
  
  <pre><code>&lt;DataGrid ItemsSource="{Binding Path=Model.ObjectList}" AutoGenerateColumns="False" AllowDrop="False"&gt;
      &lt;DataGrid.Columns&gt;
      &lt;DataGridTemplateColumn Header="Item No."&gt;
      &lt;DataGridTemplateColumn.CellTemplate&gt;
          &lt;DataTemplate&gt;
              &lt;ComboBox ItemsSource="?????" SelectedValue="{Binding Path=ItemNumber}" SelectedValuePath="Id"/&gt;
          &lt;/DataTemplate&gt;
      &lt;/DataGridTemplateColumn.CellTemplate&gt;
  &lt;/DataGrid&gt;
  </code></pre>
  
  <p>The columns of the grid can have bindings only to properties that are inside an Object element from my ObjectList, Is there a way to bind a property from the parent model to a grid cell?</p>