特定字典元素作为CommandParameter

Question

    <i:Interaction.Triggers>
        <i:EventTrigger EventName="Loaded">
            <i:InvokeCommandAction CommandParameter="{}" Command="{Binding ChangeViewModelCommand}"/>
        </i:EventTrigger>
    </i:Interaction.Triggers>

In the ViewModel, itself, I have a Dictionary<string, IViewModel> defined which contains a reference to every ViewModel of the application. The property is ApplicationViewModels . From this command, is it possible to access a specific Dictionary entry of ApplicationViewModels ?

The goal is to pass an already instantiated instance to the command.

Answer 1

Yes, you can and it's very simple to do so:

<i:Interaction.Triggers>
    <i:EventTrigger EventName="Loaded">
        <i:InvokeCommandAction CommandParameter="{Binding ApplicationViewModels[DictKey]}" Command="{Binding ChangeViewModelCommand}"/>
    </i:EventTrigger>
</i:Interaction.Triggers>

Where DictKey is the key of the viewmodel you're trying to pass.