Dotnet Core API - Get the URL of a controller method

Question

I'm developing an API and it has two Controllers: PicturesController and AccountController. There's a method on PicturesController that returns an image and I'd like to know how to get its URL.

On another PicturesController method, I got the URL using the code bellow:

var url = Url.RouteUrl("GetPicture", new { id = picture.Id }, Request.Scheme);

But I need to get the URL of the same method, however from another controller (AccountController).

I tried the following code, but it results null.

var url = Url.Action("GetPicture", "PicturesController", new { id = picture.Id }, Request.Scheme);

That's the method:

public class PicturesController : Controller
{
  ...

   // GET api/pictures/id
    [HttpGet("{id}", Name = "GetPicture")]
    public async Task<ActionResult> Get(Guid id)
    {
        var picture = await _context.Pictures.FirstOrDefaultAsync(p => p.IsActive() && p.Id == id);

        if (picture == null)
            return NotFound();

        return File(picture.PictureImage, "image/jpg");
    }
  ...
}

Your code says GetPicture but the action is called Get

DavidG
– DavidG

2019-02-03 18:10:10 +00:00
Commented Feb 3, 2019 at 18:10 — DavidG
– DavidG, Commented Feb 3, 2019 at 18:10

DavidG · Accepted Answer · 2019-02-04 00:52:47Z

4

The problem is that you are using GetPicture in this code:

var url = Url.Action("GetPicture", "PicturesController", new { id = picture.Id }, Request.Scheme);

The first parameter for Url.Action is the name of the action, which in your case is Get, so it should be

var url = Url.Action("Get", "PicturesController", new { id = picture.Id }, Request.Scheme);

answered Feb 4, 2019 at 0:52

DavidG

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1 Comment

R. de Veen Over a year ago

Avoid using literal strings, use nameof(GetPicture) and nameof(PicturesController) instead.

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