[Solved] RowIsExpandedChanging and RowIsExpandedChanged are never raised

[Alexandre]

Please close this issue... 

Regards,

Alex

[Patrick]

I am testing out the trial version of this along with other third-party controls to determine which my company should purchase and ran into this error as well.

I have added this event many different ways to no avail:

<telerik:RadGridView x:Name="staffRGV" Grid.Row="1" AutoGenerateColumns="False" ItemsSource="{Binding DataView, ElementName=staffDDS}" IsBusy="{Binding IsBusy, ElementName=staffDDS}"
                             AddingNewDataItem="AddNewDataRow" RowIndicatorVisibility="Collapsed" RowEditEnded="UpdateAuditFields" RowIsExpandedChanged="staffRGV_RowIsExpandedChanged">
            <telerik:RadGridView.Columns>
                <telerik:GridViewToggleRowDetailsColumn />
                <telerik:GridViewDataColumn DataMemberBinding="{Binding STAFF_ID}" Header="Staff ID" IsReadOnly="True" />
                .....
and also by

this.staffRGV.RowIsExpandedChanged += new EventHandler<RowCancelEventArgs>(staffRGV_RowIsExpandedChanged);
            this.staffRGV.RowIsExpandedChanging += new EventHandler<RowEventArgs>(row_IsExpandedChanging);

Each method, staffRGV_RowIsExpandedChanged and row_IsExpandedChanging, simply contains a throw new Exception(); line, which never occurs upon clicking on the plus sign in the GridViewToggleRowDetailsColumn.

Am I using this control incorrectly, or is there an actual bug here?

[Vlad]

Hello Patrick,

 Can you post more info about the treelist version? 

Kind regards,
Vlad
the Telerik team

[Patrick]

It is the most recent version of the Telerik controls for Silverlight, specifically version 2011.1.315.1040.

Also, I am using the GridView control.

[Vlad]

Hello Patrick,

 Our latest official version is Q2 2011 - you have Q1 2011. 

Kind regards,
Vlad
the Telerik team

[Yavor Georgiev]

Hi Patrick,

 From what I see, you are using the GridViewToggleRowDetailsColumn, which controls the row details visibility. However, both RowIsExpandedChanged and RowIsExpandedChanging fire when the row is expanded or collapsed to reveal hierarchy. I guess that you probably need to use the RowDetailsVisibilityChanged event, instead, as the GridViewToggleRowDetailsColumn fires that event, not the RowIsExpanded* events.

Best wishes, Yavor Georgiev
the Telerik team

[Patrick]

First of all, thank you for your response. That solution worked well, however, it brought about another issue.

The RowDetailsVisibilityChanged event will also fire when the radgrid's RowDetails are scrolled out of view. Is there a way I can avoid this?

Thanks,

Patrick

[Vlad]

Hello Patrick,

 You can avoid this if you turn off the rows virtualization however this will affect the grid performance badly. 

All the best,
Vlad
the Telerik team

[Patrick]

Ok thanks. I will have to find a workaround then.