[Solved] RadDataBoundListBox.DataRequested doesn't firing with EventToCommand behavior

[Alexey]

Hi.
I have a view:
<telerikPrimitives:RadDataBoundListBox

    x:Name="TransactionsListBox"

    ItemsSource="{Binding Transactions}"

    DataVirtualizationItemTemplate="{Binding UserInterfaceVM.ReconcileTransactionItemTemplate, Source={StaticResource Locator}}"

    ScrollViewer.VerticalScrollBarVisibility="Disabled"

    DataVirtualizationMode="OnDemandAutomatic">

    <telerikPrimitives:RadDataBoundListBox.ItemLoadingTemplate>

        <DataTemplate>

            <telerikPrimitives:RadBusyIndicator IsRunning="True" AnimationStyle="AnimationStyle9"/>

        </DataTemplate>

    </telerikPrimitives:RadDataBoundListBox.ItemLoadingTemplate>

    <i:Interaction.Triggers>

        <i:EventTrigger EventName="DataRequested">

            <GalaSoft_MvvmLight_Command:EventToCommand Command="{Binding RefreshCommand}"/>

        </i:EventTrigger>

    </i:Interaction.Triggers>

</telerikPrimitives:RadDataBoundListBox>

By RefreshCommand never fires. If I'm adding handler for DataRequested in code-behind, then I'm getting this event. What can be wrong?

[Alexey]

Resetting value of DataVirtualizationMode from None to OnDemandAutomatic in one of my states makes DataRequested fires.

[Deyan]

Hi Alexey,

Thanks for writing.

Based on the code snippet alone I cannot exactly say why you won't have the event fired. You should set the DataVirtualizationMode to OnDemandAutomatic to get this event for sure. If you think there is an issue with this event, please open a new support ticket and attach your project for further investigation.

Thanks for your time.

Regards,
Deyan
Telerik

[Alexey]

I've found that DataRequested not firing when ItemsSource is null (or binded to ItemsSource property list is null).
I set ItemsSource to some list and change value DataVirtualizationMode on "OnDemandAutomatic" then  DataRequested event appears.
This behavior not documented but it should be.

[Deyan]

Hello Alexey,

Thanks for writing back.

Indeed, you need to have ItemsSource to be able to receive this event. We will make sure to update our online help.

Regards,
Deyan
Telerik