.NET 5 REST API Tutorial: 03 Dependency Injection, DTOs

This is the third part of my .NET 5 REST API Tutorial. You will learn:
• What is dependency injection?
• How to register and inject dependencies in .NET 5
• How to implement Data Transfer Objects (DTOs)
• How to implement Data Transfer Objects (DTOs)

#dotnet #restapi #tutorial

[jonhubbard]

This is an impressive series. I have never come across such a clear and concise explanation of Dependency Injection. This is now my #1 link to hand to junior developers when trying to get them up to speed on the why and how of DI. Bravo!

[gazells]

Your clear explanation of Dependency Injection is the one that made it all click for me! Thanks so much 🙏

[zjp]

one of the best tutorial I watch he use visual representation to make explanation better your a rockstar man thanks

[RNN]

I like the way you explain "this" at 17:00 -- very clear and easy to understand. Thanks!

[itbank]

Your lessons are worth a GOLD :) Thanks for explaining Patterns in very easy way :)

[dheeraj]

One of the best representation and explanation I have ever come across for DI. This is very lucid to understand. Thank you Julio. Keep up the good work.

[thesuperiorman]

With time and effort, your channel will definitely grow. You're very talented at this.

[mywildlifestories]

Julio, your videos are awesome. I loved these tutorials, precise and clear to understand. Kudos man.

[torrvic]

Thank you so much Julio!
But can we have several static methods in our static class to convert different Entities to DTOs?

[brianbaldos]

Nice and very understandable tutorial. All the best!

[sowmyancs]

Awesome series and very clear to understand. Thank you so much Julio!!!

[Pixch]

thank yoo for your work man! very informative!

[MrMostafam]

thanks for your videos, , , it shows me many things i'm looking for especially your explainning for the abbreviations used in api

[Thepuddingmovies]

8:34 is why u do right naming conventions on private readonly variables with _repository so you don't need to assign it to this instance of the controller..

[sebastianreynosonunez]

Awesome Tutorials, i just found 1 thing. In the function AsDto you have to validate if the parameter is null or not, and return null if is it.
If you try to find a item that doesnt exist in the List or DB, you will get an unhandled exception.

public static ItemDto AsDto(this Item x)
{
if (x is null) return null;
return new ItemDto{
Id = x.Id,
Name = x.Name,
Price = x.Price,
CreatedDate = x.CreatedDate
};
}

[kartheeknandini]

I love your videos. do more videos thank you

[eliassal]

Hi, So the fact of adding services.AddSingleton<ItemsRepository, InMemItemsRepository>(); in startup, then just chnage the constructor repository), will make the controller to receive the right object, how does this work? There is nothing from startup sending this object to the controller? Can you please explain as I am new to this injection stuff Thanks

[sowmyancs]

If we have multiple microservices what would be the best way to organize the repository and other artifacts? Is it per project or a common project? Also, a video on Entity Framework Core would be very helpful too!!!

[kartheeknandini]

Hello Hulio,

Instead of using IEnumarable<Item> if we can use Task<IActionResult> as return type we can avoid the Item schema which displaying in swagger

[doeseast]

Tq, Julio. Learn alot from your videos.👍👍👏👏👏