How to use snackbar with ViewModel?

[CristianoDevNet]

Does anyone know?

[Mithicor]

I am not currently using injection in my projects, so here is how you can set up snackbars and dialogs without it:

In your Window that you want to display said snackbar or dialog, you want to put these:

<Window x:Class="MainWindow" ...>
  <Grid>
    <!-- YOUR OTHER CONTROLS AND CONTENT GOES HERE -->

    <ui:SnackbarPresenter  x:Name="SnackbarPresenter"/>
    <ContentPresenter x:Name="RootContentDialog"/>
  </Grid>
</Window>

Create the services in your ViewModel.

public class ViewModel
{ 
  public ISnackbarService snackbarService { get; set; }
  public IContentDialogService dialogService { get; set; }

  public ViewModel()
  {
      dialogService = new ContentDialogService();
      snackbarService = new SnackbarService();
  }
}

You will set the presenters that you placed in your window XAML from the Window Constructor. The example below:

public class MainWindow
{  
  public ViewModel viewModel { get; } = new ViewModel();

  public MainWindow()
  {
      InitializeComponent();

      DataContext = viewModel 

      viewModel.DialogService.SetDialogHost(RootContentDialog)
      viewModel.SnackbarService.SetSnackbarPresenter(SnackbarPresenter)
  }
}

Example of usage from ViewModel:

public void OnSaveData()
{
    try
    {
        DB.SaveChanges();

        snackbarService.Show(
            "DATA SAVED",
            "Changes successfully saved to the database.",
            ControlAppearance.Success,
            new SymbolIcon(SymbolRegular.Fluent24), 
            TimeSpan.FromSeconds(2));
    }
    catch (Exception ex)
    {
        snackbarService.Show(
            "SAVE PROCESS FAILED",
            $"ERROR: {ex.Message}",
            ControlAppearance.Danger,
            new SymbolIcon(SymbolRegular.Fluent24), 
            TimeSpan.FromSeconds(2));
    }
}