Post method is not running on Postman

Question

Creating a method POST and testing by Postman, I can’t access the Controller that POST. I haven’t implemented much yet, but I should stop at Break if, of course, it was working. Controller

[Route("api/[controller]")]
public class OptOutClientController : Controller
{
    private IOptOutCreateService optOutCreateService;

    HttpClient httpClient = new HttpClient();

    public OptOutClientController(IOptOutCreateService optOutCreateService)
    {
        this.optOutCreateService = optOutCreateService;
    }

    [HttpPost]
    public async Task<IActionResult> OptOutPostClient([FromBody]OptOutRequest client)
    { **Breakpoint nessa chave e não entra **

        if (client == null)                                                                                          
            throw new OptOutException( "Favor informar os dados do OptOut!");

        var result = await optOutCreateService.Process(new OptOutCreateCommand(client.Cpf, client.Email, client.Telefone, client.Bandeira, client.Canal));

        return Ok(new ApiReturnItem<OptOutResult> { Item = result, Success = true });
    }
}

Screenshot of Postman running the method POST

EDIT1

I made a small example with nothing, just a controller and nothing else and I have the same error: Startup.Cs

public class Startup
    {
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddMvc();
            services.AddRouting();
        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IHostingEnvironment env)
        {
            app.UseMvc(routes =>
            {
                routes.MapRoute(
                    name: "default",
                    template: "{controller=Home}/{action=Index}");
            });
        }
    }

controller

[Route("api/[controller]")]
    public class HomeController : Controller
    {
        [HttpPost]
        public IActionResult postar()
        {
            return Ok();
        }
    }

Postman url:http://localhost:51553/api/home/post body: {"test": "1"}

And get the same page not found error

Answer 1

Explanation

You’ve assigned a route to Controller but did not assign to the Action, in this case, the Conventional Routing. In this type of routing, by default, the name of the Action for the construction of the route.

In your case, you are not entering the section of the route responsible for directing the Action (OptOutPostClient)

Solution

Change the POST directing to the route below:

http://localhost:51585/api/OptOutClient/OptOutPostClient

If you do not have a default route applied, put as follows:

        app.UseMvc(routes =>
        {
            routes.MapRoute(
                name: "default",
                template: "{controller=Home}/{action=Index}");
        });