C#•3y ago

Dependency Injection not working (.NET 8)

I am trying to set up DI for my services but I keep running into the same error, regardless of what I try.

builder.Services.AddScoped<IAdminService, AdminService>();

builder.Services.AddScoped<IAdminService, AdminService>();

Is what I keep coming back to in my client side app, but nothing is working.

You can find my code here https://github.com/Ghrafkly/BlazorApp9. You can do a find string on

WEQ

WEQ

to quickly locate the files that are causing issues

PixxelKick•11/15/23, 10:01 PM

You have your IAdminService registered in the project, but your Admin page is over in the project

PPixxelKick You have your IAdminService registered in the `BlazorApp9` project, but your Adm...

Very FunnyOP•11/15/23, 10:06 PM

I have IAdminService and AdminService in both my client and server projects

PixxelKick•11/15/23, 10:06 PM

oh my bad so you do

VVery Funny I am trying to set up DI for my services but I keep running into the same error,...

viceroypenguin•11/15/23, 10:11 PM

https://github.com/Ghrafkly/BlazorApp9/blob/b99db7a3a0c867d5731e776f8730e268c31db130/BlazorApp9/BlazorApp9.Client/Program.cs#L16
what value is in ?
what is the correct server API base url?

Vviceroypenguin https://github.com/Ghrafkly/BlazorApp9/blob/b99db7a3a0c867d5731e776f8730e268c31d...

Very FunnyOP•11/15/23, 10:33 PM

Idk. That’s what was in the default configs when I generated my .NET 7 project. I just copied it across

Very FunnyOP•11/15/23, 10:33 PM

I am aware that there will be things I can’t copy verbatim from 7 to 8. Just a matter of figuring out what out what

VVery Funny Idk. That’s what was in the default configs when I generated my .NET 7 project. ...

viceroypenguin•11/15/23, 10:36 PM

you should know. or you should be able to debug it. if you can't debug it, then i would encourage you to spend more time learning how to debug programs, as a critical tool in your programming belt. regardless, there's nothing else i can do to help you unless you can try the basics.

Vviceroypenguin you should know. or you should be able to debug it. if you can't debug it, then ...

Very FunnyOP•11/15/23, 10:39 PM

I’ve tried debugging but I haven’t gotten any insights from it

Very FunnyOP•11/15/23, 10:40 PM

I do use debugging a lot at work and in other projects. But this is also my first C# project ever so maybe I am missing something

viceroypenguin•11/15/23, 10:40 PM

so what is ? you should know this from debugging
and what is the server API base URL? You should know this from either launchsettings.json or from the browser window open to the server project.

Very FunnyOP•11/15/23, 10:41 PM

Ah. I can get back to you on that later today when I’m home

viceroypenguin•11/15/23, 10:41 PM

specifically, the server URLs are "https://localhost:7148;http://localhost:5066", from the launchsettings.json

Very FunnyOP•11/15/23, 10:41 PM

It should be 7148 as that is what my application is running on

Vviceroypenguin specifically, the server URLs are "https://localhost:7148;http://localhost:5066"...

Very FunnyOP•11/15/23, 10:44 PM

Also I am running my project with https, so yeah 7148 definitely

viceroypenguin•11/16/23, 3:55 AM

@Very Funny created a PR that fixes it for you.

viceroypenguin•11/16/23, 3:55 AM

You have to use the same interface from for both server and client Service. Then the server can implement the interface for the client page on the server side, while the client can implement the interface fro the client page on the client side.

Vviceroypenguin You have to use the same interface from `Client` for both server and client Serv...

Very FunnyOP•11/16/23, 4:10 AM

Looking forward to trying it out when I get home

Very FunnyOP•11/16/23, 4:11 AM

I coulda sworn I had tried it that way, maybe I thought about it but never actually gave it a shot.

Very FunnyOP•11/16/23, 4:11 AM

The past few days have just been a haze of errors and bugs

Vviceroypenguin @Very Funny created a PR that fixes it for you.

Very FunnyOP•11/16/23, 7:22 AM

IT WORKS, thank you so so much

Very FunnyOP•11/16/23, 7:22 AM

feels like I can breathe again

Very FunnyOP•11/16/23, 7:24 AM

am having issues with my endpoints and URI

Very FunnyOP•11/16/23, 7:24 AM

It loads the data properly at first then it errors

Very FunnyOP•11/16/23, 7:24 AM

VVery Funny am having issues with my endpoints and URI

viceroypenguin•11/16/23, 12:27 PM

Sure, what does the exception message say? Can you think of what it means and how that relates to the URIs in your code?

Vviceroypenguin Sure, what does the exception message say? Can you think of what it means and ho...

Very FunnyOP•11/16/23, 12:28 PM

I spent the past few hours looking into it

Very FunnyOP•11/16/23, 12:28 PM

I think the double reference of IAdminService might be breaking it. Cause it also causes my ManageAdmin page to load twice

viceroypenguin•11/16/23, 12:29 PM

it also causes my ManageAdmin page to load twice - this is more likely due to the fact that the first rendering is done on the server and the second rendering is done on the client. of course it's going to run twice.

Very FunnyOP•11/16/23, 12:29 PM

Even though the following is correct. The URI base address doesn't seem to presist to my client side AdminService

viceroypenguin•11/16/23, 12:29 PM

but there's a way to deal with that, and i don't know what that is yet.

Very FunnyOP•11/16/23, 12:30 PM

I have a hacky fix that works, I might just keep it like this for now

Vviceroypenguin but there's a way to deal with that, and i don't know what that is yet.

Very FunnyOP•11/16/23, 12:37 PM

I looked into AddKeyedSingleton etc. It feels like that would be what I'd need. Unsure how I would implement it though

viceroypenguin•11/16/23, 12:39 PM

i'm curious how you think keyedsingleton is going to help you...

viceroypenguin•11/16/23, 12:40 PM

do you know what keyed registrations are for?

Vviceroypenguin do you know what keyed registrations are for?

Very FunnyOP•11/16/23, 1:21 PM

not really, just glanced at the documentation and one youtube tutorial

Very FunnyOP•11/17/23, 1:05 AM

What are the Pro Cons of for server-side pages vs for client-side pages?

Very FunnyOP•11/17/23, 1:05 AM

cause might save me from the past 4 days of pain I have had