Issue when following Music Store App Guide

[bitpoke-YT]

Describe the bug

When following the Guide and i get to Open a Dialog Vscode with the extension flags this.WhenActivated(d => d(ViewModel!.ShowDialog.RegisterHandler(DoShowDialogAsync))); for DoShowDialogAsync underlined with read This is what is said Argument 1: cannot convert from 'method group' to 'System.Action<ReactiveUI.IInteractionContext<MusicApp.ViewModels.MusicStoreViewModel, MusicApp.ViewModels.AlbumViewModel? and getting some error when trying to run or build

To Reproduce

Copy the code from the Guide on the website https://docs.avaloniaui.net/docs/tutorials/music-store-app/opening-a-dialog

Expected behavior

No response

Avalonia version

11.1.0

OS

Windows

Additional context

Sorry if it is not written well.

[thevortexcloud]

Can you share your full code for your code behind? It's likely a signature problem.

[bitpoke-YT]

Here is the Code it is the same as in the Guide

using Avalonia.ReactiveUI;
using ReactiveUI;
using MusicApp.ViewModels;
using System.Threading.Tasks;

namespace MusicApp.Views;

public partial class MainWindow : ReactiveWindow<MainWindowViewModel>
{
    public MainWindow()
    {
        InitializeComponent();
        this.WhenActivated(d => d(ViewModel!.ShowDialog.RegisterHandler(DoShowDialogAsync)));
    }
    private async Task DoShowDialogAsync(InteractionContext<MusicStoreViewModel, 
                                            AlbumViewModel?> interaction)
    {
        var dialog = new MusicStoreWindow();
        dialog.DataContext = interaction.Input;
        var result = await dialog.ShowDialog<AlbumViewModel?>(this);
        interaction.SetOutput(result);
    }
}

[IanRawley]

How about the ViewModel, specifically the definition of ShowDialog?

[maxkatz6]

Add "using System;"
It's a common mistake with ReactiveUI.

[bitpoke-YT]

Added using System But Still get this error

error CS1503: Argument 1: cannot convert from 'method group' to 'System.Action<ReactiveUI.IInteractionContext<MusicApp.ViewModels.MusicStor
eViewModel, MusicApp.ViewModels.AlbumViewModel?>>

I have Goan through the guide again but got the same error. Think this may be because the Guide is out dated?

[Georapella]

I'm going through this tutorial too and am having the same problem.

I think I found a solution though...

1. Add .UseReactiveUI() to AppBuilder in Program.cs.
2. Make sure ViewModelBase inherits from ReactiveObject in ViewModels/ViewModelBase.cs
3. Change InteractionContext to IInteractionContext for DoShowDialogAsync in Views/MainWindow.axaml.cs.

[bitpoke-YT]

Thank you so much.

[MelkOuss]

thanks @Georapella,

also just in case for future developers, the package may be missing in the project file (as it was for me). You may need to verify that it was referenced as it should be by adding it to the .csproj file:

<ItemGroup> <PackageReference Include="Avalonia.ReactiveUI" Version="11.2.3" /> </ItemGroup>

[bitpoke-YT]

This Should be Changed in the Documentation