Re-Sorting Columns causes data to disappear?

[Jeff]

Hello all,

    I am working with a Telerik grid that loads Employee data with multiple columns. The grid loads Employee information based on a ClientId. The data in the grid loads and displays just fine when I initially open the grid. However, after selecting a column header to re-sort the column (either in ascending or descending order), the data seems to disappear. Our team has recently updated our Silverlight app from the Trial Version. I wasn't sure if this would cause any type of problem because re-sorting a particular column seemed to work fine with the trial version. Let me know if you have any ideas, thanks.

[Vlad]

Hi,

 Can you post the grid version? More info about how exactly the grid is bound and/or any custom xaml/code will be helpful as well. 

Best wishes,
Vlad
the Telerik team

[Jeff]

Yes the itemsource is bound to a CollectionView..

The the viewmodel consists of a loading method that consists of .. 
  

if (client != null)
            {
                EmployeeSearchService.Clear<EmployeeBasic>();

                //Performs a paged load of the employee list of data.
                Action<int> pagedLoad = null;
                pagedLoad = (skip) =>
                    {
                        var filter = new QueryBuilder<EmployeeBasic>()
                            .Where(e => e.ClientId == client.ClientId && e.Status == "Active")
                            .OrderBy(e => e.FullName)
                            .Skip(skip)
                            .Take(TAKE);

                        filter.RequestTotalItemCount = true;

                        EmployeeSearchService.LoadEmployeeBasic(filter)
                               .Subscribe((slr) =>
                               {
                                   if (slr.TotalEntityCount > TAKE)
                                   {
                                       pagedLoad(skip + TAKE);
                                   }
                               });
                    };

                pagedLoad(INITIALSKIP);
            }

This again, seems to work just fine when the grid is initially open. It just disappears when re-sorting the column to ascending/descending order. In order to re-retrieve the data to be seen in the grid, I have to select a new clientId.

The XAML for the fomation of the grid looks like...

                  <telerik:RadGridView x:Name="radGridView"
                                 Grid.ColumnSpan="2"
                                 HorizontalAlignment="Stretch"
                                 AutoGenerateColumns="False"
                                 DataLoadMode="Asynchronous"
                                 IsFilteringAllowed="True"
                                 IsReadOnly="True"
                                 ItemsSource="{Binding Employees}"
                                 RowIndicatorVisibility="Collapsed"
                                 ShowGroupPanel="False">

The XAML for a specific the name column for example looks like..

<telerik:GridViewDataColumn DataMemberBinding="{Binding ClientId}"
                                                Header="{Binding Strings.ClientId,
                                                Source={StaticResource EmployeeResources}}"
                                                IsSortable="True" />

[Vlad]

Hello Jeff,

 Please remove DataLoadMode="Asynchronous" - your service is already asynchronous and you do not need this setting. 

Best wishes,
Vlad
the Telerik team

[Jeff]

Vlad,

   Problem solved! Thank you very much.