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wpfmvvm
John
John

Reputation: 1477

MVVM interaction drop trigger

I have a ListView that I need to function as a drop target. I have added the following trigger

<i:Interaction.Triggers>
    <i:EventTrigger EventName="Drop">
        <i:InvokeCommandAction Command="{Binding ItemsDroppedCommand}" 
            CommandParameter="{Binding ???}"/>
    </i:EventTrigger>
</i:Interaction.Triggers>

The problem is though I dont know how to get the dropped items. What should go in the CommandParameter binding?

If I do a drop handler in code behind I get a DragEventArgs parameter that enables me to get the files dropped. Is there a way to get this?

If this is the wrong approach please feel free to suggest alternatives

Upvotes: 3

Views: 2996

Answers (2)

Enrico Campidoglio
Enrico Campidoglio

Reputation: 59983

Passing an event's arguments to a Command through binding isn't supported out of the box but can be achieved through a workaround.

However, I would recommend you to use the EventToCommand behavior available in MVVM Light, which enables exactly this scenario:

<i:Interaction.Triggers>
    <i:EventTrigger EventName="Drop">
        <cmd:EventToCommand Command="{Binding ItemsDroppedCommand}"
                            PassEventArgsToCommand="True" />
    </i:EventTrigger>
</i:Interaction.Triggers>

Upvotes: 3

Pongsathon.keng
Pongsathon.keng

Reputation: 1435

please take a look on this thread MVVM Passing EventArgs As Command Parameter

In this thread will help you solve the problem. I hope this help.

Upvotes: 2

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