VirtualQueryableCollectionView and VirtualItemCount

9 posts, 0 answers
  1. ss
    ss avatar
    50 posts
    Member since:
    Jun 2010

    Posted 16 Nov 2010 Link to this post

    Hello,

    I use followinf code:

    1.RadTreeListView rr = new RadTreeListView();
    2.  
    3.VirtualQueryableCollectionView v = new VirtualQueryableCollectionView();
    4.v.LoadSize = 10;
    5.v.VirtualItemCount = 20;
    6.v.ItemsLoading += (s, eee) => { };
    7.  
    8.rr.ItemsSource = v;

    I dont know why but "rr.ItemsSource = v" raises ArgumentNullException (Value cannot be null., Parameter name Key). If  I use RadGridView everythings works fine.

    Can you please help me.

    Thank you.

  2. Vlad
    Admin
    Vlad avatar
    11100 posts

    Posted 16 Nov 2010 Link to this post

    Hello,

     RadTreeListView currently is not supported - we will do our best to include support as soon as possible. 

    Sincerely yours,
    Vlad
    the Telerik team
    See What's New in RadControls for Silverlight in Q3 2010 on Tuesday, November 16, 2010 11:00 AM - 12:00 PM EST or 10:00 PM - 11:00 PM EST: Register here>>
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  4. ss
    ss avatar
    50 posts
    Member since:
    Jun 2010

    Posted 16 Nov 2010 Link to this post

    Could you please tell me approximately when?

    Thank you.

  5. Vlad
    Admin
    Vlad avatar
    11100 posts

    Posted 16 Nov 2010 Link to this post

    Hello ss,

     Our initial target is Q1 2011 (early March most probably) - the main problem comes from the fact that we need to define (and implement) clearly hierarchical data virtualization (the case with RadTreeListView). 

    Kind regards,
    Vlad
    the Telerik team
    See What's New in RadControls for Silverlight in Q3 2010 on Tuesday, November 16, 2010 11:00 AM - 12:00 PM EST or 10:00 PM - 11:00 PM EST: Register here>>
  6. Eugene
    Eugene avatar
    2 posts
    Member since:
    Jun 2010

    Posted 18 Jul 2011 Link to this post

    Hi guys,

    Is there any news about virtualization for  RadTreeListView? It looks like the recent release doesn't contain any fixes. I'm still getting  ArgumentNullException.

    Regards.

  7. Vlad
    Admin
    Vlad avatar
    11100 posts

    Posted 19 Jul 2011 Link to this post

    Hi Eugene,

     Unfortunately we were unable to include any improvements regarding Data Virtualization and RadTreeListView. The task is not trivial since in this case we need to virtualize (and flat) hierarchical data however keep the sorting, filtering, etc. hierarchically. 

    Kind regards,
    Vlad
    the Telerik team

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  8. ss
    ss avatar
    50 posts
    Member since:
    Jun 2010

    Posted 02 Aug 2011 Link to this post

    Will the next version have this functionality? We are still eagerly awaiting.
  9. Rob Conley
    Rob Conley avatar
    47 posts
    Member since:
    Sep 2012

    Posted 08 Jan 2013 Link to this post


    When you say "not supported", you mean that the RadTreeListView cannot be used with the VirtualQueryableCollectionView, correct?

    Any recent updates on this or is this the way it is for the foreseeable future?
  10. Vlad
    Admin
    Vlad avatar
    11100 posts

    Posted 09 Jan 2013 Link to this post

    Hello,

     Indeed the treelist (the latest version as well) cannot be used with the virtual collection.

    Greetings,
    Vlad
    the Telerik team

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