Error passing parameter through Getasync method

Question

How I pass the object login as a parameter for the method GetAsync ? I’m trying to do it this way, but I didn’t get the error message:

   private async Task<JsonResult> obterLogin(Login login)
            {
                try
                {
                    HttpClient httpCliente = new HttpClient();
                    httpCliente.BaseAddress = new Uri("http://localhost:55838/");
                    httpCliente.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
                    HttpResponseMessage response = await httpCliente.GetAsync("MedClinApi/Login/Obter/ { login }", login);
                    var json = await response.Content.ReadAsStringAsync();
                    return JsonConvert.DeserializeObject<JsonResult>(json, new JsonSerializerSettings { ContractResolver = new CamelCasePropertyNamesContractResolver() });      
                }
                catch
                {
                    throw;
                }
            }

Error Print:

Answer 1

The problem is that you are passing your parameter incorrectly, if you are using C# version 6 or higher you can pass parameter using string Interpolation:

HttpResponseMessage response = await httpCliente.GetAsync($"MedClinApi/Login/Obter/{ login }");

If you are using a lower version of C#, use it as follows:

HttpResponseMessage response = await httpCliente.GetAsync(string.Format("MedClinApi/Login/Obter/{0}", login));

This way you will put your parameter in the url, but it makes more sense to send an object in the HTTP request body using the POST method. If this service is yours I suggest you change to POST. Below is an example:

var result = await client.PostAsync(url, new StringContent(login, Encoding.UTF8, "application/json"));