title: WPF Bind Grid.Column Property
body: <p>I need to set Grid.Column property of an item by a converter. 
  this is my xaml :</p>
  
  <pre><code>&lt;ItemsControl.ItemTemplate&gt;
      &lt;DataTemplate&gt;
          &lt;TextBlock Text="{Binding Periodo.Inizio}"&gt;
              &lt;Grid.Column&gt;
                  &lt;MultiBinding Converter="{StaticResource ItemColumnSetter}"&gt;
                      &lt;Binding RelativeSource="{RelativeSource Self}" /&gt;
                      &lt;Binding RelativeSource="{RelativeSource Mode=FindAncestor, AncestorType=local:Timeline}" Path="StartDate" /&gt;
                      &lt;Binding RelativeSource="{RelativeSource Mode=FindAncestor, AncestorType=local:Timeline}" Path="EndDate" /&gt;
                      &lt;Binding Path="Periodo.Inizio" /&gt;
                  &lt;/MultiBinding&gt;
              &lt;/Grid.Column&gt;
          &lt;/TextBlock&gt;
      &lt;/DataTemplate&gt;
  &lt;/ItemsControl.ItemTemplate&gt;
  </code></pre>
  
  <p>But don't work.
  I'm sure that the converter work well...</p>