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Editorial Team
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Asked: 2026-05-12T06:33:01+00:00

I am trying to learn Asp.net Mvc so I am trying out this Tutorial.

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I am trying to learn Asp.net Mvc so I am trying out
this Tutorial.

They talk about the Repository Pattern and how it is easy to change to another data access technology instead of just calling Linq to Sql directly.

Using LINQ to SQL within a controller class makes it difficult to switch data access technologies in the future. For example, you might decide to switch from using Microsoft LINQ to SQL to using the Microsoft Entity Framework as your data access technology. In that case, you would need to rewrite every controller that accesses the database within your application.

Note: I never really understood how an interface worked before reading this tutorial and it’s still not 100% clear. I see it now as some sort of ‘template’ for a class.

After successfully using Linq to Sql I thought it would be nice to try out Ado.net Entity Framework since I’ve been reading a lot about this. They said using the Repository Pattern would make it easy to switch so I thought I would test that.

My question is: what should I do to change to Ado.net EF?

This is what I think I should do.

  • Add the Movie.edmx file and configure it(add my movie table).
  • Write a new class based on the IMovieRepository and maybe call it MovieEFRepository.
  • Change the parameter in the controller constructor to MovieEFRepository. This is the first thing I find strange because in the tutorial they say that not using the repository will force you to change all the controllers if you change to an other datasource. Don’t I need to change every controller anyway since I am specifying the MovieRepository class?
  • The last adjustment I think I need to do is to change the View. Because it’s using the Product class which was created by the Linq to Sql designer. I am not sure how I am going to do this. I guess I should have used some object that wasn’t dependent on the dbml file?

Forgive me if I have a slightly simplistic view of Asp.net Mvc. I am webdesigner with a lot of interest for Asp.net webdevelopment.

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1 Answer

  1. Editorial Team

    You might have your repository decoupled because of injection, not if you followed just the examples because of

    public MoviesController() : this(new **MovieRepository**())

    I recomend you to read about IOC, is easy and very interesting, you can use and ioc container like castle windsor.

    With that, your contoller will have only one constructor, the one with the interface, and not will need to be changed.

    With your entities you can do the same that with the controllers, create an interface for each entity and use the ioc pattern too, with tha you will only have to change your configuration file for your ioc container.

    If you don’t do these things, your right, you will need to change all you said.

    I hope that help! sorry about my english!

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