Hi,

we (our company and I) are using your RadGridView in our application. It works fine with an desktop pc (input by mouse), but if we are using a tablet pc (input by touchscreen) we have some problems with the performance.
Because of these issus we develop a small WPF application with the MS DataGrid and your RadGridView. The DataGrid scroll-performance is perfectly but your RadGridView is stuttering.

Code:
<!-- MS WPF -->
 <DataGrid
            TextElement.FontSize="15"
            Width="1260"
            Height="325"
            DockPanel.Dock="Top"
            AutoGenerateColumns="False"
            CanUserAddRows="False"
            SelectionMode="Single"
            VirtualizingPanel.IsVirtualizing="False"
            VirtualizingPanel.VirtualizationMode="Recycling"
            VirtualizingPanel.ScrollUnit="Pixel"
            ScrollViewer.IsDeferredScrollingEnabled="True"
            EnableColumnVirtualization="False"
            EnableRowVirtualization="False"
            IsReadOnly="True"
            ItemsSource="{Binding Path=CachedListe}">
            <DataGrid.Columns>
                <DataGridTemplateColumn
                    Width="80">
                    <DataGridTemplateColumn.CellTemplate>
                        <DataTemplate>
                            <StackPanel
                                Orientation="Horizontal">
                                <Button
                                    Margin="1"
                                    Command="{Binding Path=Open.Command}"
                                    Content="WPF"></Button>
                                <telerik:RadButton
                                    Margin="1"
                                    Command="{Binding Path=Open.Command}"
                                    Content="Telerik"></telerik:RadButton>
                            </StackPanel>
                        </DataTemplate>
                    </DataGridTemplateColumn.CellTemplate>
                </DataGridTemplateColumn>
                <DataGridTextColumn
                    Width="81"
                    Binding="{Binding Path=Id}"
                    Header="Nummer"></DataGridTextColumn>

                <DataGridTextColumn
                    Width="150"
                    Binding="{Binding Path=Bezeichnung}"
                    Header="Geschäft"></DataGridTextColumn>

                <DataGridTextColumn
                    Width="140"
                    Binding="{Binding Path=AnsprechpartnerName}"
                    Header="Ansprechpartner"></DataGridTextColumn>

                <DataGridTextColumn
                    Width="120"
                    Binding="{Binding Path=Strasse}"
                    Header="Strasse"></DataGridTextColumn>

                <DataGridTextColumn
                    Width="66"
                    Binding="{Binding Path=PLZ}"
                    Header="PLZ"></DataGridTextColumn>

                <DataGridTextColumn
                    Width="140"
                    Binding="{Binding Path=Ort}"
                    Header="Ort"></DataGridTextColumn>

                <DataGridTextColumn
                    Width="100"
                    Binding="{Binding Path=Gebiet.Bezeichnung}"
                    Header="Gebiet"></DataGridTextColumn>
            </DataGrid.Columns>
        </DataGrid>

<!-- Telerik-->

        <telerik:RadGridView
            Width="1260"
            Height="325"
            DockPanel.Dock="Top"
            ScrollMode="Deferred"
            Visibility="Visible"
            telerik:GridViewVirtualizingPanel.IsVirtualizing="False"
            IsReadOnly="True"
            AutoGenerateColumns="False"
            x:Name="StandorteGrid"
            RowHeight="25"
            GroupRenderMode="Flat"
            ItemsSource="{Binding Path=Liste}"
            CanUserDeleteRows="False"
            CanUserInsertRows="False"
            CanUserReorderColumns="False"
            CanUserFreezeColumns="False"
            EnableColumnVirtualization="False"
            EnableRowVirtualization="False">
            <!--<telerik:RadGridView.SortDescriptors>
                <telerik:SortDescriptor
                    Member="PLZ"
                    SortDirection="Ascending">
                </telerik:SortDescriptor>
                <telerik:SortDescriptor
                    Member="Strasse"
                    SortDirection="Ascending">
                </telerik:SortDescriptor>
            </telerik:RadGridView.SortDescriptors>-->
            <telerik:RadGridView.Columns>
                <!--<telerik:GridViewDataColumn
                    Width="80">
                    <telerik:GridViewDataColumn.CellTemplate>
                        <DataTemplate>
                            <StackPanel
                                Orientation="Horizontal">
                                <Button
                                    Margin="1"
                                    Command="{Binding Path=Open.Command}"
                                    Content="WPF"></Button>
                            </StackPanel>
                        </DataTemplate>
                    </telerik:GridViewDataColumn.CellTemplate>
                </telerik:GridViewDataColumn>-->
                <telerik:GridViewDataColumn
                    x:Name="ColNummer"
                    Width="81"
                    DataMemberBinding="{Binding Path=Id}">
                    <telerik:GridViewDataColumn.Header>
                        <TextBlock
                            Text="Nummer" />
                    </telerik:GridViewDataColumn.Header>
                </telerik:GridViewDataColumn>
                <telerik:GridViewDataColumn
                    x:Name="ColGeschaeft"
                    DataMemberBinding="{Binding Path=Bezeichnung}"
                    Width="150"
                    TextWrapping="Wrap">
                    <telerik:GridViewDataColumn.Header>
                        <TextBlock
                            Text="Geschäft" />
                    </telerik:GridViewDataColumn.Header>
                </telerik:GridViewDataColumn>
                <telerik:GridViewDataColumn
                    x:Name="ColAnsprech"
                    DataMemberBinding="{Binding Path=AnsprechpartnerName}"
                    Width="140"
                    TextWrapping="Wrap">
                    <telerik:GridViewDataColumn.Header>
                        <TextBlock
                            Text="Ansprechpartner" />
                    </telerik:GridViewDataColumn.Header>
                </telerik:GridViewDataColumn>
                <telerik:GridViewDataColumn
                    x:Name="ColStrasse"
                    DataMemberBinding="{Binding Path=Strasse}"
                    Width="120"
                    TextWrapping="Wrap">
                    <telerik:GridViewDataColumn.Header>
                        <TextBlock
                            Text="Strasse" />
                    </telerik:GridViewDataColumn.Header>
                </telerik:GridViewDataColumn>
                <telerik:GridViewDataColumn
                    x:Name="ColPlz"
                    DataMemberBinding="{Binding Path=PLZ}"
                    Width="66">
                    <telerik:GridViewDataColumn.Header>
                        <TextBlock
                            Text="PLZ" />
                    </telerik:GridViewDataColumn.Header>
                </telerik:GridViewDataColumn>
                <telerik:GridViewDataColumn
                    x:Name="ColOrt"
                    DataMemberBinding="{Binding Path=Ort}"
                    Width="140"
                    TextWrapping="Wrap">
                    <telerik:GridViewDataColumn.Header>
                        <TextBlock
                            Text="Ort" />
                    </telerik:GridViewDataColumn.Header>
                </telerik:GridViewDataColumn>
                <telerik:GridViewDataColumn
                    x:Name="ColGebiet"
                    DataMemberBinding="{Binding Path=Gebiet.Bezeichnung}"
                    Width="100"
                    TextWrapping="Wrap">
                    <telerik:GridViewDataColumn.Header>
                        <TextBlock
                            Text="Gebiet" />
                    </telerik:GridViewDataColumn.Header>
                </telerik:GridViewDataColumn>


                <telerik:GridViewDataColumn
                    x:Name="ColLetzterBesuch"
                    DataMemberBinding="{Binding Path=Besuch.DatumCheckIn}"
                    DataFormatString="{}{0:dd.MM.yyyy}"
                    Width="100">
                    <telerik:GridViewDataColumn.Header>
                        <TextBlock>
<Run
                                Text="letzter" />
<LineBreak />
<Run
                                Text="Besuch" />
                        </TextBlock>
                    </telerik:GridViewDataColumn.Header>
                </telerik:GridViewDataColumn>
            </telerik:RadGridView.Columns>
        </telerik:RadGridView>

Now my question, how can we improve our code?

Greatings and thanks in advance
Nils

Hello Nils,

I noticed you have set the EnableRow/ColumnVirtualization properties to false. Is there a specific reason for disabling the Vitualization mechanism? This will introduce major performance issues, especially on machines with lower system specs. 

Furthermore, depending on your version of our controls, you may be experiencing an additional performance hit on tablet pc's, due to the fact that there is a service running that triggers the build of the AutomationTree of RadGridView. You can check if this is the case, by disabling the TabletInputService from TaskManager, and test the performance again after that. 

Let me know how it goes. 

Regards,
Nik
Telerik

Thanks for your response.

I've tried both. EnableRow/ColumnVirtualization = true and I'm disable the TabletInputService.
Nothing changed it's still stuttering.

Have you some other ideas?

Greatings and thanks in advance
Nils

Additional Information
The tablet pc hardware:
AMD C-50 2x 1Ghz
Shared GPU
2 GB RAM
Windows 8.1 N
1280x800 display

Hi Nils,

The suggestions I gave were the only out of the box guesses that could help. 
I cannot say anything with certainty without having a look at a sample where I can reproduce the problem. Would it be possible to provide a small project which I can debug in order to provide a solution in the shortest terms? 


Regards,
Nik
Telerik

Hi Nik

Yes, I can send you our little testproject, but where can I upload or at witch emal-adresse can I send you the project as ".zip"-file.

Regards,
Nils 

Hello,

You can open a support thread and attach the project there.

If your company has purchased a license from another account, please ask the purchaser to add your email to the list of licensed developers so that we can provide you with all services suggest. In that way, you can get access to the support services (24-hour support tickets), the latest hotfixes and downloads from within your account.

In general I would also suggest you going through the Degraded Performance help article suggesting on how you could improve the performance of RadGridView. 

Regards,
Didie
Telerik