Blazor bypasses running client Program.cs and client side DI fails

[sam-wheat]

The attached app is a default Blazor template for an app with authentication.

I have made the following changes:

Server Project

App.razor:

private IComponentRenderMode? RenderModeForPage => HttpContext.Request.Path.StartsWithSegments("/Account")
	   ? null
	   : new InteractiveWebAssemblyRenderMode(prerender: false);	

Client project

Added a class called MyObject.
Registered a MyObject singleton in Program.cs.
Added a control called Shared/LoginStatusControl.razor.
Inject MyObject in Home.razor and LoginStatusControl.
Add LoginStatusControl to MainLayout.
Add @attribute [Authorize] to Home.razor.

Problem:

In the configuration described it appears that Blazor bypasses running Program.cs. This causes MyObject to not be registered as a singleton and ultimately results in this error:

Cannot provide a value for property 'myObject' on type 'BlazorAuthExample2.Client.Shared.LoginStatusControl'. There is no registered service of type 'BlazorAuthExample2.Client.MyObject'.

Removing @attribute [Authorize] from Home.razor appears to mitigate this issue however in my production app, all pages including "/" need to direct the user to login if they have not done so.

Also, I need to use new InteractiveWebAssemblyRenderMode(prerender: false) because I have some controls that render modals and they do not render correctly if I don't use that render mode.

Question:
How can I protect all pages with @attribute [Authorize] and still have my client side DI work?

BlazorAuthExample2.zip

[javiercn]

@sam-wheat thanks for contacting us.

If you are using web assembly, you need to register your object in both environments.

[sam-wheat]

@javiercn as a singleton in both environments? How many instances will I have?

[javiercn]

@sam-wheat You'll have an instance on the server and an instance on the client.

You have two processes, one running server-side and one running client-side. They are completely independent and don't automatically share any kind of state.