Why does navigation not work?

[eclere]

Hello,
I cannot navigate from the code behind. I have tried different methods from the documentation. Nothing happens. I do not receive an exception.

My routes:
routes.Register( new RouteMap("", View: views.FindByViewModel<ShellModel>(), Nested: [ new ("Login", View: views.FindByViewModel<LoginModel>()), new ("Dashboard", View: views.FindByViewModel<DashboardModel>()), new ("ObjektTasks", View: views.FindByViewModel<ObjektTasksPageModel>())//, //new ("Second", View: views.FindByViewModel<SecondModel>()), ] ) );

Try with click handler:

`public sealed partial class ObjektTasksPage : Page
{
public ObjektTasksPage()
{
this.InitializeComponent();
}

    public ObjektTasksPageModel? ViewModel => DataContext as ObjektTasksPageModel;

    private async void Button_Click(object sender, RoutedEventArgs e)
    {
        var nav = this.Navigator();
        await nav.NavigateRouteAsync(this, "Dashboard");
    }
}`

Try with ViewModel:
`public partial record ObjektTasksPageModel
{
BoardService _board;
readonly INavigator _nav;
int _taskId = -1;

    public ObjektTasksPageModel(
        BoardService authentication,
        INavigator navigator)
    {
        _board = authentication;
        _nav = navigator;
    }

    public IState<TaskContainer> AufgabenContainer => State<TaskContainer>.Async(this,

    async ct => await _board.GetAufgabeAsync(_taskId)

    );

    public async ValueTask DoneTask(CancellationToken ct)
    {

        var result = await _board.PatchTaskAsync(_taskId, ct);
        if (result)
        {
            _ = await _nav.NavigateRouteAsync(this, "Dashboard");
        }
    }
}`

XAML Button
<Button Content="Done" Style="{StaticResource FilledButtonStyle}" Command="{Binding DoneTask}" />

Can anybody help?

[morning4coffe-dev]

Hey @eclere,

since I don't have the whole sample, I wasn't able to reproduce the issue with a similar setup. Can you by any chance please provide full repro project?

If not, you can have a look at my sample where I tried to reproduce this: UnoNavigationSample.zip. Make sure to also check if you have the correct views registered in RegisterRoutes and you have the .UseNavigation(ReactiveViewModelMappings.ViewModelMappings, RegisterRoutes) set for Configure.

[eclere]

Hello,

thank you for the reply. I was able to modify your example with the problem. You can download it.

Thanks fpor help.

[morning4coffe-dev]

Nice! Can you please upload the package directly on GitHub? (just dragging the .zip file to this text field should do), I am not able to download it from the website. Thanks.

[eclere]

UnoApp3.zip

No problem;)

[morning4coffe-dev]

I see, thank you for providing the repro. To make this work, I think you need to use the DependsOn parameter when defining the route. For example, something like this should work when navigating to "Other" from "Entity":

routes.Register(
    new RouteMap("", View: views.FindByViewModel<ShellModel>(),
        Nested:
        [
            new ("Main", View: views.FindByViewModel<MainModel>(), IsDefault: true),
            new ("Entity", View: views.FindByViewModel<EntityPageModel>()),
            new ("Other", View: views.FindByViewModel<OtherModel>(), DependsOn: "Entity"),
        ]
    )
);

If you specifically need to navigate to "Main" this way, that might be a limitation, and I'm not sure if it would work well. However, we can open an issue in the uno.extensions repo to track this further.