That's not the full error. Can you please provide more details about what you're trying to do, and what is actually happening? If the developer of this module is available, you may want to talk to them about it as well.

The problem is in async:

My Action:

public async Task<ActionResult> Index() {
            var httpClient = new HttpClient();
            var json = await httpClient.GetStringAsync("http://localhost/Consulta...Api/Distrito");            
            var distrito = JsonConvert.DeserializeObject<List<Distrito>>(json);
            return View(distrito);
        }

My API:

namespace ConsultasVarias.Controllers {
    public class DistritoController : ApiController
    {        
        [HttpGet]
        public List<DistritoCLS> ListarDistritos() {
            List<DistritoCLS> distritos = null;
            try {
                SAT.ConsultasVarias oBLL = new SAT.ConsultasVarias();
                DataTable dtDsitrito = oBLL.ListarDistritos(FuncionesWEB.GetConexionSoporteWEB()).Tables[0];               
                distritos = (from DataRow dr in dtDsitrito.Rows
                             select new DistritoCLS() {
                                 vDistrito = dr["vDistrito"].ToString()
                             }).ToList();
            } catch (Exception ex) {
                //log.Error("TraceMessage:" + ex.StackTrace);
            }            
            return distritos;
        }       
    }
}

Result

Test in MVC

 

You're posting about a custom ASP.NET application. This community is about DNN. While someone here could potentially help you, you really should use another "forum," such as StackOverflow.com.

I am creating a module for DNN (VS 2017 + Christoc.com) that must consume a Web API because I cannot consume DCOM.

Posted By Omar Sánchez on 10/27/2023 4:53 PM
I am creating a module for DNN (VS 2017 + Christoc.com) that must consume a Web API because I cannot consume DCOM.

Hey Omar, I have to ask... Why are you using VS 2017 and what in your application requires DCOM?