Add WebAPI to existing aspnetcore MVC Project

Question

I have created a new Project, selected ASP.NET Core Web Application (.NET Core), then selected Web Application, Individual User Accounts.

All is good and the project works perfectly, but I want to add WebAPI functionality to this project, so that http://website.com/Home is MVC, and http://website.com/api/whatever is my api, I would like them both to use the same authentication database (so you can register on the MVC site and authenticate to the API).

I do not want to add a second project to the solution if I can avoid it.

Someone posted how to add WebAPI 4 to an existing MVC project but those instructions failed at step 1, add x to the Global.asax, which doesn't exist for an ASP.Net Core MVC Project.

Please help.

Andrei · Accepted Answer · 2016-09-23 16:46:52Z

13

Your ASP.NET Core Controller already supports both MVC and WebAPI. In ASP.NET Core these frameworks were combined together. So all you need is declare a controller action but instead of returning ViewResult return your REST API model.

Example:

public class ValuesController : Controller
{
    [HttpGet]
    public List<string> Get()
    {
        return new List<string> { "Hello", "World" };
    }

    [HttpGet]
    [Route("values/{valueName}")]
    public string Get(string valueName)
    {
        return valueName;
    }
}

It must be accessible under GET: /api/values and GET /api/values/ + valueName, depending on configuration. These are most common use cases.

Good luck.

edited Sep 23, 2016 at 16:46

answered Jul 8, 2016 at 19:07

Andrei

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13 Comments

Shaine Fisher Over a year ago

Well I created my class, added a scaffolding item, set the context etc, and then I got this... There was an error creating the DbContext instance to get the model. No parameterless constructor defined for this object.

Shaine Fisher Over a year ago

Or, create controller, API Controller with Actions using Entity Framework, set context, same error.

Shaine Fisher Over a year ago

You were right, just selected the item API Controller with read/write actions, and it did it, thank you :) Answer accepted.

Shaine Fisher Over a year ago

So how do I access my api then? I tried /api/Tests and it offers to download a json file called Tests.json ??

poppertech Over a year ago

How do you authenticate API requests?

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