Interaction trigger for FilterDescriptors events

[Vikas]

I am using Interaction triggers to Data bind the Data filter event to Relay commands in view model, I can do this for FilterOperatorsLoading event that is directly in DataFilter but i need to listen to 2 other events that are in FilterDescriptors.

This event works:

<i:EventTrigger EventName="FilterOperatorsLoading">
                    <cmd:EventToCommand Command="{Binding FilterOperatorsLoadingCommand}" PassEventArgsToCommand="True" />
</i:EventTrigger>

How can do that same for RadDataFilter.FilterDescriptors.CollectionChanged and RadDataFilter.FilterDescriptors.ItemChanged event

Thanks

vikas mittal

[Martin]

Hello Vikas,

 Thank you for contacting us.

To achieve the desired behavior, you should set explicitly the SourceObject property of EventTrigger. Please take a look at the code snippet below and consider how this approach fits your scenario.

<telerik:RadDataFilter x:Name="radDataFilter"
                   Source="{Binding Items, ElementName=clubsGrid}">
    <i:Interaction.Triggers>
        <i:EventTrigger EventName="CollectionChanged" SourceObject="{Binding FilterDescriptors, ElementName=radDataFilter}">
            <cmd:EventToCommand Command="{Binding CollectionChangedCommand}" PassEventArgsToCommand="True" />
        </i:EventTrigger>
        <i:EventTrigger EventName="ItemChanged" SourceObject="{Binding FilterDescriptors, ElementName=radDataFilter}">
            <cmd:EventToCommand Command="{Binding ItemChangedCommand}" PassEventArgsToCommand="True" />
        </i:EventTrigger>
    </i:Interaction.Triggers>
</telerik:RadDataFilter>

I hope that this helps. Should you have any other questions, do not hesitate to contact us.

Regards,
Martin Vatev
Telerik

[Vikas]

Thanks Martin, it works.

Not sure why i dont see your answer here, I got the email. Posting the answer in case anybody else runs into this issue.

 

<telerik:RadDataFilter x:Name="radDataFilter"
                   Source="{Binding Items, ElementName=clubsGrid}">
    <i:Interaction.Triggers>
        <i:EventTrigger EventName="CollectionChanged" SourceObject="{Binding FilterDescriptors, ElementName=radDataFilter}">
            <cmd:EventToCommand Command="{Binding CollectionChangedCommand}" PassEventArgsToCommand="True" />
        </i:EventTrigger>
        <i:EventTrigger EventName="ItemChanged" SourceObject="{Binding FilterDescriptors, ElementName=radDataFilter}">
            <cmd:EventToCommand Command="{Binding ItemChangedCommand}" PassEventArgsToCommand="True" />
        </i:EventTrigger>
    </i:Interaction.Triggers>
</telerik:RadDataFilter>