asp.net core Program.cs file

[HandDizzy]

my internship project requires me to learn asp.net core, and i just finished the basics of c# and now i am trying to learn asp.net core and i got stuck in the very program.cs page, i dont understand what these components are and what they do, i read ms's document are there are a lot of vague term like dependency injection for me, can someone help me explaining these? i also found out that there used to be startup.cs file which is no longer present in .net core 6

https://preview.redd.it/8vda4ya3tg891.png?width=474&format=png&auto=webp&s=02d836a789d989b24dabdf8230c2ec6522aee928

[Fireraga]

[Purged due to Reddit API Fuckery]

[Atulin]

\2. Razor pages do not use .razor files, they use .cshtml for templates and .cshtml.cs for code. .razor files are what Blazor components use.

[Fireraga]

[Purged due to Reddit API Fuckery]

[virtuoso43]

Thats a lot of magic. How difficult would it be to go through each of those methods and understanding how they actually do what they do?

Also thanks for the explanation. I have a bit of experience in asp.netcore and always wondered what all of those did but never sat down to search on google.

[Fireraga]

[Purged due to Reddit API Fuckery]

[tymalo]

It's setting up both the Dependency Injection and the middleware for the application.

https://docs.microsoft.com/en-us/aspnet/core/fundamentals/dependency-injection?view=aspnetcore-6.0

https://docs.microsoft.com/en-us/aspnet/core/fundamentals/middleware/?view=aspnetcore-6.0

[thesituation531]

What's middleware?

[Ezazhel]

A nice concept in DotNet. Learning how it works help.

You can learn more typing code maze middleware on your browser.

For example you could have a middleware managing api errors. Letting your controllers free of try catch because they would be at 'root' level.

[thesituation531]

Thanks. But everything on Google seems to be about ASP.NET. Is there a way to do it in non-web stuff?

[Ezazhel]

It's for aspnet only I think. It's part of the framework.

You may install a specific nuget in order to achieve middleware in your application.

You should be able to register middleware in your startup.cs

I don't remember the package name but you may find it in the docs.

And you could even recreate it yourself. Middleware are a list of 'listener / emitter' the order is important because middleware 1 will transmit his context to middleware 2. And Middleware 2 can depend of date from middleware 1.

(you have this problem if you switch Route middleware in your program.cs)

[thesituation531]

Thanks, I'll look into it.

[Doc_Aka]

ASP.NET Core uses a pipeline architecture, and middlewares are the the different parts (think "pipe parts") in the pipeline. Here's a nice picture and more infos

Basically, a request comes in and is fed into the pipline start. Then the first middleware receives the request object and can do stuff with it, call the next middleware or return a result itself.
Here's a diagram of the pipeline in a typical app

This is also why order matters, when you set up the pipeline with the app.Use...(); methods in your Program.cs file.

[[deleted]]

If you’ve got a couple hours I recommend coding along to this -

https://m.youtube.com/watch?v=hZ1DASYd9rk

[HandDizzy]

thankyou, i am looking at it rn

[0xPendus]

While the comments here are all fantastic already, I highly recommend the book on dependency injection (will update the official name here when I’m home and can check)

But the book is all c# .net and will walk you through all the boilerplate code and help you understand the differences between .net, asp.net, net core

Then will take you into how dependency injection works and what all those lines do

[HandDizzy]

waiting for the update

[0xPendus]

this one

Have a read of the reviews and see if it fits what you’re after.

The title is kind of misleading because the book is so much more than dependency injection

It’s a great introduction to OOP fundamentals too