Problem With RadDataPager & VirtualQueryableCollectionView

8 posts, 0 answers
  1. Stephen
    Stephen avatar
    3 posts
    Member since:
    Apr 2011

    Posted 14 Apr 2011 Link to this post

    I have an issue with the DataPager when used with the VirtualQueryableCollectionView.

    When paging the DataPager creates the correct number of pages and allows me to correctly navigate through them. When changing pages the VirtualQueryableCollectionView loads the data as expected, this is populated in the list box as expected. The list box moves to the correct page location but is not displaying just the page size, its displaying all records from that point.

    If I change from the ListBox to the telerik RadGridView the grid view displays 5 items as expected.

    In my XAML page i have...

    <t:RadDataPager x:Name="dataPager" Source="{Binding MyDataSource}" PageSize="5" NumericButtonCount="10" AutoEllipsisMode="Both" /> 
        
    <ListBox  ItemsSource="{Binding PagedSource, ElementName=dataPager}"/>

    In my data model I something like the following...

    MySource = new VirtualQueryableCollectionView<SomeObject> { LoadSize = 30, VirtualItemCount = 100 };
    MySource.ItemsLoading += (s, e) =>
    {
       _dataManager.GetMyData(e.StartIndex, e.ItemCount).CompletedWithOutErrors += operation =>
       {
         var tempData = operation.Entities.Single();
      
         if (tempData.TotalCount != MySource.VirtualItemCount)
         {
            MySource.VirtualItemCount = tempData.TotalCount;
         }
                             
         MySource.Load(e.StartIndex, tempData.DataItems);
       };
    };
      
    ...
      
    public VirtualQueryableCollectionView<SomeObject> MySource { get; set; }

    Any ideas as to what i'm doing wrong here.

    Cheers

    Stephen

  2.
  3. Vlad
    Admin
    Vlad avatar
    11100 posts

    Posted 14 Apr 2011 Link to this post

    Hello,

     As far as I can see you have set PageSize="5" and LoadSize = 30. In this case collection will load 30 items - you will get 6 pages loaded.

    Best wishes,
    Vlad
    the Telerik team
    Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Public Issue Tracking system and vote to affect the priority of the items
  5. Stephen
    Stephen avatar
    3 posts
    Member since:
    Apr 2011

    Posted 14 Apr 2011 Link to this post

    I've already tried quite a few combinations of PageSize, LoadSize etc none make any difference to the issue i'm having.

    This loads 30 items in a single load from the back end, until I browse to the 7th page where it loads the next 30 as expected.

    The grid view shows 5 items as i'd expect but the ListBox and RadTileView both display the full number of items in the virtual collection (which is over 5000).

    The items that haven't yet been loaded have empty data in the ListBox but are rendered (which means its rendering all 5000+) instead of the expected 5.

    Cheers

    Stephen
  7. Vlad
    Admin
    Vlad avatar
    11100 posts

    Posted 14 Apr 2011 Link to this post

    Hi Stephen,

     Can you post more info about the version? Is it our Q1 2011?

    Greetings,
    Vlad
    the Telerik team
    Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Public Issue Tracking system and vote to affect the priority of the items
  9. Stephen
    Stephen avatar
    3 posts
    Member since:
    Apr 2011

    Posted 14 Apr 2011 Link to this post

    We have the latest version installed, Q1 2011.
    The components have version number of 2011.1.315.1040

    Cheers

    Stephen
  11. Vlad
    Admin
    Vlad avatar
    11100 posts

    Posted 14 Apr 2011 Link to this post

    Hello Stephen,

     The problem is identified and fixed immediately! The fix will be part of our upcoming service pack early next week. 

    I've added 2000 Telerik points to your account. 

    Regards,
    Vlad
    the Telerik team
    Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Public Issue Tracking system and vote to affect the priority of the items
  13. ScimarGreg
    ScimarGreg avatar
    6 posts
    Member since:
    Mar 2011

    Posted 27 Apr 2011 Link to this post

    Thanks for bringing this up Stephen. We're having the same exact problem right now as well.
  14.
  15. Charlie
    Charlie avatar
    24 posts
    Member since:
    Jan 2009

    Posted 06 May 2011 Link to this post

    Thanks Stephen for being this up.  I was having the same problem.

    Thanks,

    Charlie J.
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