Exception when editing in grouped mode, asynchronous

[Josh]

This problem occurs when beginning edit mode on a cell while the radgridview is grouped by at least one column , and its DataLoadMode is set to Asynchronous.  It does not occur in Synchronous mode, which is our current workaround.  But the performance drop is noticeable in Synchronous mode...

<UserControl x:Class="SpectrumSL.SilverlightControl1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:telerik="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.GridView">

    <Grid>
        <telerik:RadGridView ItemsSource="{Binding Collection}"  ShowGroupPanel="True" DataLoadMode="Asynchronous"/>
    </Grid>

</UserControl>

Partial Public Class SilverlightControl1
    Inherits UserControl

    Private _collection As New ObservableCollection(Of tableitem)
    Public Property Collection() As ObservableCollection(Of tableitem)
        Get
            Return _collection
        End Get
        Set(ByVal value As ObservableCollection(Of tableitem))
            _collection = value
        End Set
    End Property


    Private Sub SilverlightControl1_Loaded(ByVal sender As Object, ByVal e As System.Windows.RoutedEventArgs) Handles Me.Loaded
        Me.DataContext = Me
        For index = 1 To 3
            Dim item As New tableitem
            item.Key = index
            item.Value = "group1"
            Collection.Add(item)
        Next
    End Sub

    Public Class tableitem
        Private _key As Integer
        Public Property Key() As Integer
            Get
                Return _key
            End Get
            Set(ByVal value As Integer)
                _key = value
            End Set
        End Property

        Private _value As String
        Public Property Value() As String
            Get
                Return _value
            End Get
            Set(ByVal value As String)
                _value = value
            End Set
        End Property
    End Class
End Class

[Milan]

Hello Josh,

I wan unable to reproduce this issue. Are you able to reproduce this with our latest internal build?

All the best,
Milan
the Telerik team

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[Josh]

Thanks for your response,
I made a new project, with latest build  2010.1.603.1040, and reproduced the error.  It happened when hitting enter after editing, or clicking another cell, while in grouped mode, and Asynchronous DataLoadMode.  I took a screenshot and I can reproduce this error every time on multiple PCs.

[Milan]

Hello Josh,

We have managed to reproduce the problem and we are currently working on a fix which will be a part of our latest Internal Build this Friday.

Thank you for your cooperation.

I have updated your Telerik points.

All the best,
Milan
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.