Mvvmcross: Opening new Window from ViewModel

[GWawrzeniecki]

Hello
How can I open a separate window from ViewModel?

[Cheesebaron]

Thanks for opening this issue. Please use and fill out the issue template as it gives us a better overview of what is going on. If you haven't already added reproduction steps or even better a repository with a reproduction sample, please do so. It speeds up debugging issues a lot.

[GWawrzeniecki]

Thanks for opening this issue. Please use and fill out the issue template as it gives us a better overview of what is going on. If you haven't already added reproduction steps or even better a repository with a reproduction sample, please do so. It speeds up debugging issues a lot.

But that was a question not an issue.

[Cheesebaron]

Sure, but how do you expect me to answer anything if you don't provide any information? We have issue templates for questions too.

[GWawrzeniecki]

Sure, but how do you expect me to answer anything if you don't provide any information? We have issue templates for questions too.

I want to open a separate window from ViewModel after pressing the button.
I have tried a navigationService but it shows the window in the current view.

[Cheesebaron]

Which platform?
What have you tried?
Did you get any error? If so what is the error?
If it crashed what is the stack trace?

[GWawrzeniecki]

Which platform?
What have you tried?
Did you get any error? If so what is the error?
If it crashed what is the stack trace?

Platform is WPF.
I have tried await _navigationService.Navigate<UserViewModel>();
I didn't get any error.
Nothing was crashed.
All the time I just want to ask, HOW to open a separate window from ViewModel. Because it's MVVM therefore I cant create new instance of view and use showDialog() method. And I'm asking how to do it in MVVM Cross.

[Cheesebaron]

All the time I was asking about details 😄 Had you just provided them to begin with everything would have been fine. But if I have to start digging it is simply not worth my time.

[Cheesebaron]

If you use the [MvxWindowPresentationAttribute] you should be able to open a specific ViewModel as a Window. See https://github.com/MvvmCross/MvvmCross/blob/develop/MvvmCross/Platforms/Wpf/Presenters/Attributes/MvxWindowPresentationAttribute.cs

Usage:
https://github.com/MvvmCross/MvvmCross/blob/develop/Projects/Playground/Playground.Wpf/Views/WindowView.xaml.cs#L16

And from ViewModel:
https://github.com/MvvmCross/MvvmCross/blob/87a545a2f59eafd2179fdde29fcebef68f171656/Projects/Playground/Playground.Core/ViewModels/MainViewModel.cs#L38

GitHub

MvvmCross/MvvmCross

The .NET MVVM framework for cross-platform solutions, including Xamarin.iOS, Xamarin.Android, Windows and Mac. - MvvmCross/MvvmCross

GitHub

MvvmCross/MvvmCross

The .NET MVVM framework for cross-platform solutions, including Xamarin.iOS, Xamarin.Android, Windows and Mac. - MvvmCross/MvvmCross

[GWawrzeniecki]

Thank you very much it's working great!