WPF ListBox Animation from one Column to another

Hi to all,

I have a WPF, .Net 3.5, Visual Studio 2008, VB.Net application that I am developing on Windows Vista. The application is very basic. I am displaying all my stores departments in a listbox (see code below). I want to animate the listbox to "move" from a column span of 2 to have no column span. Doing it in blend does not give the "Animation look" that I want. It just shows the listbox covering the whole gridview in one second and the next it displays the listbox just covering one column. It does not animate the Transition.

I want to animate the transition of what I am trying to do, but don't know how to do this in order to make the listbox appear to re-size while the animation is in progress.

Any help in this regard would be appreciated.

<Grid x:Name="contentGrid" Margin="0,76,0,0">
        		<RowDefinition Height="197.333"/>
        		<ColumnDefinition Width="292.836"/>
        		<ColumnDefinition Width="339.031"/>
                <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
                    <GradientStop Color="#FFC8C8C8" Offset="0"/>
                    <GradientStop Color="White" Offset="1"/>

<ListBox x:Name="DepListview" Background="{x:Null}" BorderBrush="{x:Null}" 
                      Foreground="{x:Null}" ItemTemplate="{DynamicResource DepartmentListview}" 
                      Grid.Column="1" RenderTransformOrigin="0.5,0.5" Margin="0" Grid.RowSpan="2" Grid.ColumnSpan="2" />

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i guess a story board animation of the listbox's Grid.ColumnSpan property from 1 to 2 goes directly - as it's an integer, you can't really span 1.1 columns. Maybe a different apporach would be to animate the width of that column? Or, set that column to Auto width and animate (with a story board on the width property), the size of your list box directly?



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ALawrence007Author Commented:
Thanks Mike. I ended up creating a rectangle in that column, got the actual width and then animated my listbox to shrink to that width. Your answer helped my in that direction.
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