Url.Link always returns null used within asp..net web api

Question

I want to create some hyperlinks for my DTO`s returned from a REST Api.

The variable url is always null and I do not know why?!

Why is the url not created, what am I still missing?

The name of the route is GetStatusFeedback that's correct and I also use Action and Controller as route parameters + the leadId param!

public class ValuesController : ApiController
{
    [Route("")]
    [HttpGet]
    public IHttpActionResult Get()
    {
        var leadsFromDataBase = new List { new Lead { Id = 1 }, new Lead { Id = 2 } };
        var leadDtos = new List();
        foreach (var lead in leadsFromDataBase)
        {
            var leadDto = new LeadDto();
            string url = Url.Link("GetStatusFeedback", new { LeadId = lead.Id, Action = "Accept", Controller = "values"});
            leadDto.AcceptLink = new Link { Url = url, Verb = "Get" };


            leadDtos.Add(leadDto);
        }
        return Ok(leadDtos);
    }

    [Route("leads/{id:int}/statusfeedback", Name = "GetStatusFeedback")]
    [HttpPost]
    public void Accept(int leadId)
    {

    }

user_1452172 · Answer

It took me a while to get what I needed from the accepted answer (and my mistake differed from the OP), here is a simplified version based on Nkosi's answer and OP's comment:

public class ValuesController : ApiController
{
  [HttpGet]
  public IHttpActionResult Get()
  {
    string url = Url.Link("GetStatusFeedback", new { Id = 1, Action = "Accept", Controller = "values"});
    /*or*/ url = Url.Link(nameof(Accept), new { Id = 1,      Action = "Accept", Controller = "values"});
    //not  url = Url.Link(nameof(Accept), new { LeadId = 1,  Action = "Accept", Controller = "values"});

    return Ok(url);
  }

// Controller we want to get the URL of:
[HttpPost("leads/{id:int}/statusfeedback", Name = "GetStatusFeedback")]
public void Accept(int id) //param name matches the line above {id} (in OP it mismatched)
{

}

Url.Link always returns null used within asp..net web api

2 Answers