[InjectAttribute] in VIew Model class

Question

[InjectAttribute] in VIew Model class

biprism 51

I injected the NavigationManager in my view Blazor Razor component and is available to use it. I'm calling from View a method in VIewModel that needs to use NavigationManager. I used [Inject] attribute to initialize the NavigationManager public property, but it is not getting injected.

One approach is to pass NaviagtionManger to VIewModel or set the navigationmanager property in VIewModel from View.
Is there a different better way to do it?

a.Razor Injects the NaviagtionManagaer using @Inject and is available within the view.
aViewModel.cs tries to Inject the NaviagtionManager and is not doing it and is not available.

Rena Ni - MSFT 2,066 Reputation points

2022-05-16T01:39:35.497+00:00

Hi @biprism , Could you pls share your view model and how do you use this view model? For injecting the service, there are two common ways. One way is to use [Inject] attribute, the other way is to inject by constructor.
balu raju 56 Reputation points

2022-06-08T20:53:09.053+00:00

[Inject]
private IUserAuthorization UserAuthorization { get; set; } = default!;

THis is how I inject my object in the ViewModel (SignatureViewModel) for a Razor component. I know it is good when I inject by constructor.

In Program.cs, I have the following
//Register the Authorization Objects
builder.Services.AddSingleton<IUserAuthorization, UserAuthorization>();

builder.Services.AddScoped<ISignatureViewModel, SignatureViewModel>()