InvalidOperationException: 'RemoteNavigationManager' has not been initialized when used from DelegatingHandler in OnAfterRenderAsync

Originally reported by @akorchev.

Repro steps:

Create a delegating handler that uses the NavigationManager to navigate.
Setup the delegating handler with HttpClient using HttpClient factory
In a Blazor Server app use the configured HttpClient from Index.razor in OnAfterRenderAsync.

System.InvalidOperationException: 'RemoteNavigationManager' has not been initialized.
   at Microsoft.AspNetCore.Components.NavigationManager.AssertInitialized()
   at Microsoft.AspNetCore.Components.NavigationManager.NavigateTo(String uri, Boolean forceLoad)
   at BlazorApp5.MyDelegatingHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken) in C:\Users\user
[BlazorApp5.zip](https://github.com/aspnet/AspNetCore/files/3602254/BlazorApp5.zip)
[BlazorApp5.zip](https://github.com/aspnet/AspNetCore/files/3602256/BlazorApp5.zip)

\Source\Repos\BlazorApp5\BlazorApp5\MyDelegatingHandler.cs:line 25
   at Microsoft.Extensions.Http.Logging.LoggingScopeHttpMessageHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
   at System.Net.Http.HttpClient.FinishSendAsyncBuffered(Task`1 sendTask, HttpRequestMessage request, CancellationTokenSource cts, Boolean disposeCts)
   at BlazorApp5.MyService.DoHttpStuff() in C:\Users\user\Source\Repos\BlazorApp5\BlazorApp5\MyService.cs:line 26
   at BlazorApp5.Pages.Index.OnAfterRenderAsync(Boolean firstRender) in C:\Users\user\Source\Repos\BlazorApp5\BlazorApp5\Pages\Index.razor:line 11

Issue Analytics

State:
Created 4 years ago
Reactions:1
Comments:11 (5 by maintainers)

Top GitHub Comments

3reactions

pranavkmcommented, Sep 12, 2019

@rynowak do we think there’s room for some changes or do we resolve this as by design? It seems like anyone using their own DI scope is not going to have a good experience.

0reactions

msftbot[bot]commented, Nov 12, 2020

Thank you for contacting us. Due to a lack of activity on this discussion issue we’re closing it in an effort to keep our backlog clean. If you believe there is a concern related to the ASP.NET Core framework, which hasn’t been addressed yet, please file a new issue.

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