Error Microsoft.AspNetCore.Components.ComponentFactory+<>c__DisplayClass9_0.<CreatePropertyInjector>g__Initialize|1(IServiceProvider serviceProvider, IComponent component)

Anonymous
2024-03-29T15:58:07.4033333+00:00

Im getting this error in my WASM project: InvalidOperationException: Cannot provide a value for property 'AuthService' on type 'WebApp.Client.Pages.Login'. There is no registered service of type 'RWebApp.Client.Authentication.IAuthenticationService'.

my progam file looks like this:

using Microsoft.AspNetCore.Components.Authorization;
using Microsoft.AspNetCore.Components.WebAssembly.Hosting;
using WebApp.Client.Authentication;
var builder = WebAssemblyHostBuilder.CreateDefault(args);
builder.Services.AddScoped(sp => new HttpClient { BaseAddress = new Uri(builder.HostEnvironment.BaseAddress) });
builder.Services.AddScoped<IAuthenticationService, AuthenticationService>();
builder.Services.AddScoped<AuthenticationStateProvider, AuthStateProvider>();
await builder.Build().RunAsync();.Run();

Im at a lost on why im getting the error beacuse i have all the pages that i need

heres my stacktrace if this helps

Microsoft.AspNetCore.Components.ComponentFactory+<>c__DisplayClass9_0.<CreatePropertyInjector>g__Initialize|1(IServiceProvider serviceProvider, IComponent component)
Microsoft.AspNetCore.Components.ComponentFactory.InstantiateComponent(IServiceProvider serviceProvider, Type componentType, IComponentRenderMode callerSpecifiedRenderMode, Nullable<int> parentComponentId)
Microsoft.AspNetCore.Components.RenderTree.Renderer.InstantiateChildComponentOnFrame(RenderTreeFrame[] frames, int frameIndex, int parentComponentId)
Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.InitializeNewComponentFrame(ref DiffContext diffContext, int frameIndex)
Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.InitializeNewSubtree(ref DiffContext diffContext, int frameIndex)
Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.InsertNewFrame(ref DiffContext diffContext, int newFrameIndex)
Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.AppendDiffEntriesForRange(ref DiffContext diffContext, int oldStartIndex, int oldEndIndexExcl, int newStartIndex, int newEndIndexExcl)
Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.ComputeDiff(Renderer renderer, RenderBatchBuilder batchBuilder, int componentId, ArrayRange<RenderTreeFrame> oldTree, ArrayRange<RenderTreeFrame> newTree)
Microsoft.AspNetCore.Components.Rendering.ComponentState.RenderIntoBatch(RenderBatchBuilder batchBuilder, RenderFragment renderFragment, out Exception renderFragmentException)
Microsoft.AspNetCore.Components.RenderTree.Renderer.ProcessRenderQueue()
Microsoft.AspNetCore.Components.RenderTree.Renderer.ProcessRenderQueue()
Microsoft.AspNetCore.Components.RenderTree.Renderer.AddToRenderQueue(int componentId, RenderFragment renderFragment)
Microsoft.AspNetCore.Components.ComponentBase.StateHasChanged()
Microsoft.AspNetCore.Components.ComponentBase.CallOnParametersSetAsync()
Microsoft.AspNetCore.Components.ComponentBase.RunInitAndSetParametersAsync()
Microsoft.AspNetCore.Components.Rendering.ComponentState.SetDirectParameters(ParameterView parameters)
Microsoft.AspNetCore.Components.RenderTree.Renderer.RenderRootComponentAsync(int componentId, ParameterView initialParameters)
Microsoft.AspNetCore.Components.HtmlRendering.Infrastructure.StaticHtmlRenderer.BeginRenderingComponent(IComponent component, ParameterView initialParameters)
Microsoft.AspNetCore.Components.Endpoints.EndpointHtmlRenderer.RenderEndpointComponent(HttpContext httpContext, Type rootComponentType, ParameterView parameters, bool waitForQuiescence)
System.Threading.Tasks.ValueTask<TResult>.get_Result()
Microsoft.AspNetCore.Components.Endpoints.RazorComponentEndpointInvoker.RenderComponentCore(HttpContext context)
Microsoft.AspNetCore.Components.Endpoints.RazorComponentEndpointInvoker.RenderComponentCore(HttpContext context)
Microsoft.AspNetCore.Components.Rendering.RendererSynchronizationContext+<>c+<<InvokeAsync>b__10_0>d.MoveNext()
Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context)
Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddlewareImpl.Invoke(HttpContext context)
Developer technologies | ASP.NET | ASP.NET Core
Developer technologies | .NET | Blazor
Developer technologies | .NET | Other
Developer technologies | C#
0 comments No comments
{count} votes

Accepted answer
  1. Michael Taylor 60,331 Reputation points
    2024-03-29T16:23:05.4566667+00:00

    Just based upon the error message it looks like you have defined your own IAuthenticationService interface (RWebApp.Client.Authentication.IAuthenticationService) and are trying to use it on your razor component. However there is already an IAuthenticationService provided by the framework. Because you have a using at the top of your startup code it is likely registering your service using the default framework interface. However in your Razor component it doesn't have that import so it is seeing your custom version instead, which isn't registered.

    If you need a custom interface for authentication then rename your custom interface to something that doesn't collide with a framework name. Then I suspect you'll get compiler errors you can fix. If you don't need a custom interface then just remove it and use the standard interface instead. This will resolve the problem as well.

    If you don't need to provide your own custom authentication service and provider then remove the AddScoped calls and just call AddAuthenticationCore instead. Honestly you should probably call that method first anyway so the core authentication infrastructure is registered. Then if you need to override the default implementations you can add your own services to the collection after the core authentication is registered.

    1 person found this answer helpful.
    0 comments No comments

0 additional answers

Sort by: Most helpful

Your answer

Answers can be marked as Accepted Answers by the question author, which helps users to know the answer solved the author's problem.