CODEWITHSUNDEEP
c#wpfxaml
Arli Chokoev
Arli Chokoev

Reputation: 549

WPF eventtrigger pass sender

I have following EventTrigger in DataGrid definition:

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

What should I declare as a CommandParameter to pass sender (which should be column) to the ColumnGeneratingCommand? Leaving this field empty leaves the command parameter empty as well (the passed object is a string "None").

Upvotes: 0

Views: 467

Answers (1)

mm8
mm8

Reputation: 169270

What should I declare as a CommandParameter to pass sender (which should be column) to the ColumnGeneratingCommand?

The implementation of InvokeCommandAction doesn't support passing a reference to the sender and if you really need this in your view model, you are doing things wrong because this breaks the MVVM pattern and what it's all about.

You need to rehink your design or create your own custom InvokeCommandAction class. A view model should never have any direct reference to a UIElement.

Upvotes: 1

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