Hi,

I have studied the sample of  Chart Info Strips, and I do below changes to make the info strip be movable:

First, import these two dlls(Microsoft.Expression.Interactions,System.Windows.Interactivity) in IGDataChart.WPF and Infragistics.SamplesBrowser.WPF project, and then in ChartInfoStrips.xaml, I add 

<i:Interaction.Behaviors>
<il:MouseDragElementBehavior ConstrainToParentBounds="False" />
</i:Interaction.Behaviors>

under TextBlock.

<DataTemplate x:Key="VerticalInfoStripTemplate">
<Grid Margin="0" Width="{Binding Width}" Height="{Binding Height}">
<Rectangle Fill="{Binding Fill}" Opacity="1" />
<TextBlock HorizontalAlignment="Center" Cursor="Hand" VerticalAlignment="Center" Foreground="DimGray"
FontSize="30" FontWeight="Bold" Text="{Binding Label}" RenderTransformOrigin=".5,.5">
<i:Interaction.Behaviors>
<il:MouseDragElementBehavior ConstrainToParentBounds="False" />
</i:Interaction.Behaviors>
<TextBlock.RenderTransform>
<RotateTransform Angle="90" />
</TextBlock.RenderTransform>
</TextBlock>
</Grid>
</DataTemplate>

Now it's movable. The requirement is  when I move it to another position, I want to get the position of it, and then save the position in order that when next time I open the page, it's in the position where I move it before.

Do I make my self clearly?  Waiting for your answer, thanks~~