CODEWITHSUNDEEP
c#asp.netasp.net-mvcdependency-injection
Fals
Fals

Reputation: 6839

Inject service into MVC Action Method

I'm developing a generic controller to handle File Upload and Download. My domain contains a general entity that will hold any file, and other child entities that will reference this one to hold the specific files reference.

I have a service for the general entity and lots of services for child specific entities.

Heres my scratch:

public class FileController : BaseController
{
  public JsonResult GetAll(IService childService) { /*lot of code*/}
  public FileResult Download(int id, IService  childService) { /*lot of code*/}
  public JsonResult Post(IService childService) { /*lot of code*/}
  public JsonResult Delete(IService childService) { /*lot of code*/}
}

How can I inject the specific service into the action?

If I don't do this way, I will get lot of junkie code doing the same stuff everywhere. Is there another way? Maybe a pattern that I did't realize?

Upvotes: 0

Views: 771

Answers (1)

David Arno
David Arno

Reputation: 43254

Rather than inject into the action, inject the service into the class:

public class FileController : BaseController
{
    private IService _childService;

    public IService ChildService { set { _childService = value; } }

    public JsonResult GetAll() { /*lot of code*/}
    public FileResult Download(int id) { /*lot of code*/}
    public JsonResult Post() { /*lot of code*/}
    public JsonResult Delete(IService childService) { /*lot of code*/}
}

Then, create a custom ControllerFactory to extend DefaultControllerFactory and specify that in your Global.asax file.

Finally, have your custom ControllerFactory class override the CreateController method and inject the IService instance when creating the controllers.

Upvotes: 3

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