Get the commandparameter value when clicking a button MVVM

Question

Other examples are not working or are completly different from what I do.

So I have a button on my XAML page like this:

 <Button Width="100"
         Height="50"
         Margin="0 0 10 0"
         Command="{Binding MenuButtonViewModel.MenuButtonCommand, Source={StaticResource Locator}}"
         CommandParameter="{Binding Parameter}"
         IsEnabled="{Binding IsEnabled}">

And on my ViewModel this:

    public RelayCommand MenuButtonCommand
    {
        get
        {
            return new RelayCommand(() =>
            {
            });
        }
    }

The question is how do I get the value of the commandparameter on my ViewModel?

    public RelayCommand<String> MenuButtonCommand
    {
        get
        {
            return new RelayCommand((parameter) =>
            {
                 Text = parameter;
            });
        }
    }

This is not working, have no idea how to do this without having to use codebehind to pass the commandparameter value to the ViewModel.

This should work. Show what you have inside that `Parameter` property. — mrogal.ski, Jun 21 '17 at 10:04
Your RelayCommand with the string parameter looks okay. That you do not get the parameter value could be caused by either the `{Binding Parameter}` binding failing, or the binding source providing a value/object that is not a string... — , Jun 21 '17 at 10:07
I get the error "Delegate 'Action' does not take 1 arguments". — user7998549, Jun 21 '17 at 10:08
Ah, yes... Try to initialize your RelayCommand like `new RelayCommand( ... )` — , Jun 21 '17 at 10:09
What is your implementation of RelayCommand? Have you tried this: https://stackoverflow.com/a/22286816/891715 — Arie, Jun 21 '17 at 10:31

score 0 · Accepted Answer · answered Jun 21 '17 at 11:16

0

Ok found the solution:

    public RelayCommand<string> Command
    {
        get
        {
            return new RelayCommand<string>(parameter =>
            {
                var str = parameter;
            });
        }
    }

Thanks guys.

answered Jun 21 '17 at 11:16

user7998549

131
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Get the commandparameter value when clicking a button MVVM

1 Answers1