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Developing Applications with ASP.NET Core

Implementing a Repository

Explore how to implement the repository pattern in ASP.NET Core by creating repository interfaces and classes. Understand using mock and SQL repositories to separate database logic from business logic, enabling easier testing and maintenance of CRUD operations.

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Repository interface

To implement a repository in your application, you need to start with implementing a repository interface. This interface will hold all method definitions that need to be implemented. For now, you are only focusing on CRUD operations.

C#
public interface IUserRepo
{
    User CreateUser(User user);
    IEnumerable<User> GetAllUsers();
    User GetUserById(int id);
    User UpdateUser(User user);
    User DeleteUser(int id);
}

It is a convention in C# to have your interface’s name start with the letter “I” as a prefix. Since this repository is going to be responsible for the User model, it is being named IUserRepo, and it has written all of the methods required. ...