Keeping a list sorted

2 posts, 0 answers
  1. cayates
    cayates avatar
    71 posts
    Member since:
    Feb 2007

    Posted 02 Feb 2009 Link to this post

    Hello,

    I have a list of objects that are mapped to a table using Open Access.  Each time a new object is added to the list it needs to be sorted using a custom comparison method.  Normally I would just create an IComparer class and use List<>.Sort(IComparer<>), however, when I try to do this with the Open Access enhanced list I get this error:

    Unable to cast object of type 'Telerik.OpenAccess.TrackedList`1[CJIS.Model.Charge]' to type 'System.Collections.Generic.List`1[CJIS.Model.Charge]'.

    The TrackedList object does not have a Sort method.  So how would I accomplish this?

    Thank you.
  2. Jan Blessenohl
    Admin
    Jan Blessenohl avatar
    707 posts

    Posted 04 Feb 2009 Link to this post

    Hello cayates,
    The speciality about sorting is it will remove/add persistent objects from/to the collection, those operations are possibly not intended and we do not implement the sort interface.

    What you can do is to implement your derivation from TrackedList<T> and add the sort capability. You can use such a SortableTrackedList<T>:TarckeList<T> directly in your persistent model.

    Sincerely yours,
    Jan Blessenohl
    the Telerik team

    Check out Telerik Trainer, the state of the art learning tool for Telerik products.
  3. DevCraft banner
Back to Top