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grouping not happening when revisiting a page

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GridView
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jen
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jen asked on 04 Jun 2014, 02:30 PM
Hi there,
I have a RadGridView with one group descriptor on a page. First time visiting this page, items are added to the list and the grid displays them correctly, with the rows grouped correctly. If I leave this page and return to it, and the data has not changed, the grid shows the list not grouped.

I have turned the group panel visibility off and I am not displaying the column that is being grouped by. I don't want the users to change the grouping, I want the grouping to always be applied.

‚Äč <telerik:RadGridView  ShowGroupPanel="False" AutoGenerateColumns="False" ItemsSource="{Binding Incentives}" EditTriggers="None"
                       IsReadOnly="True" IsFilteringAllowed="False" Margin="5" x:Name="grd_incentives">
                            <telerik:RadGridView.GroupDescriptors>
                                <telerik:GroupDescriptor Member="Type" DisplayContent="{Binding Type}" />
                            </telerik:RadGridView.GroupDescriptors>
                            <telerik:RadGridView.Columns>
                                <telerik:GridViewDataColumn Header="Name" DataMemberBinding="{Binding Name}" Width="*" MaxWidth="250"  />
                                <telerik:GridViewDataColumn Header="Bulletin Number" DataMemberBinding="{Binding BulletinNumber}" Width="115"  />
                                <telerik:GridViewDataColumn  Header="Special Instructions" DataMemberBinding="{Binding SpecialInstructions}" Width="250"  />
                            </telerik:RadGridView.Columns>
                        </telerik:RadGridView>


Is there something I can do to re-apply the grouping?
grd_incentives.Items.Refresh(); didn't help

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Dimitrina
Telerik team
answered on 04 Jun 2014, 03:10 PM
Hello,

I am not able to reproduce such a problem neither locally nor on our online demos. You can test this yourself grouping by a column and then navigating between the different pages.

Would you please share how have you defined the paging? Have you defined it as explained in the Paging RadGridView online documentation?

Regards,
Didie
Telerik
 
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jen
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answered on 04 Jun 2014, 03:38 PM
I have figured out what's happening. When leaving this page the list the grid is bound to becomes null, which somehow causes the grid's groupDescriptors collection to change (action = refresh). I managed to catch and cancel that event, and now the group descriptor stays as I defined it in the xaml.
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Dimitrina
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jen
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