GridView paging doesn't work correctly when grouping

[Ken]

Hi,

I have the following code:

<telerik:RadGridView ItemsSource="{Binding PagedSource, ElementName=dataPager}"

                                 IsReadOnly="True"

                                 ShowGroupPanel="False"

                                 ShowColumnHeaders="False"

                                 RowIndicatorVisibility="Collapsed"

                                 AutoGenerateColumns="False"

                                 AutoExpandGroups="True">

 <telerik:RadGridView.GroupDescriptors>
     <telerik:GroupDescriptor Member="OwnerTypeDescription"/>
 </telerik:RadGridView.GroupDescriptors>

</telerik:RadGridView>

 

<telerik:RadDataPager x:Name="dataPager"

                      PageSize="{Binding RecordsPerListPage}"

                      Source="{Binding PagedCollection}"

                      DisplayMode="FirstLastPreviousNext"

                      IsTotalItemCountFixed="False"/>

The property RecordsPerList page returns 10, however the paging doesn't take this into account and 20+ records are still shown on a single page.

I noticed that this only happens if grouping is set for the gridview. If I remove the GroupDescriptor paging works properly and only 10 records per page are shown.

Any idea why this is happening?

Thanks!

[Ken]

This also seems to vary with the PageSize. In my example if I set RecordsPerListPage to 5, in the grouped list i get 12 entries per page, if I set it to 6 I get 13 and if I set it to 7 I get 16.

Ideas?

[Petya]

Hello Adrian,

The behaviour you're observing is related to the fact that when RadGridView is grouped, the groups are pages and not the individual items. Could you have a look at the Paging Before Grouping example for RadGridView in our demos and check whether the approach suits your needs? 

I hope this helps. 

 

Regards,
Petya
Telerik

[Ken]

Hi Petya,

Thanks for the answer! It seems to work perfectly.

Cheers,

Adrian