RIA Services using TransitioningContentControl

10-26-2009 7:58 PM |

 Hi all,

 I've got a question regarding how to best apply RIA Services to my scenario. I currently have the RIA Services go and fetch some list data from a SharePoint site and then display it to users using a TransitioningContentControl. The problem is that when transitioning content, because the DomainDataSource's DataView has moved to previous/next, the existing object is no longer referenced, which means the TCC's transition does not look correct.

 When the user clicks next/previous, the DataView changes to the next/previous item correctly, however the view on the existing item is not maintained for it to be transitioned out. The existing item just disappears the moment the next item is loaded. The relevant code is as follows:

<riaControls:DomainDataSource x:Name="listObjectsDataSource" ... />
<layoutToolkit:TransitioningContentControl x:Name="tccScroller" Content="{Binding Data, ElementName=listObjectsDataSource}">
   ...
</layoutToolkit:TransitioningContentControl>

There are buttons outside of the TCC that trigger the transition. Example code from one of them:

tccScroller.Transition = "LeftTransition";
listObjectsDataSource.DataView.MoveCurrentToPrevious();
if (listObjectsDataSource.DataView.IsCurrentBeforeFirst) listObjectsDataSource.DataView.MoveCurrentToLast();
tccScroller.DataContext = listObjectsDataSource.DataView.CurrentItem;
// must explicitly call GoToState to trigger transition
// because the TCC's 'Content' is not actually changing
// to automatically trigger it, just the DataContext
VisualStateManager.GoToState(tccScroller, tccScroller.Transition, true);

Am I doing something wrong here? Is there a simple way to have the binding keep the reference to the 'previous' item for the duration of the transition?

Cheers