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Can't get error message on BadRequest in Web Api 2

I've googled a lot searching for an answer to my problem with no luck so, let's try if someone else can help me.

I have a Web Api 2 action to register an user after doing some validations. If everything works, it return the serialized user and if don't, an error message sent within a BadRequest response.

At the other hand, I have a WPF client that calls the API for a response.

My problem is that I can't get the reason sent by the error, the client just get the Bad Request error message.

This is a part of the code:

  • Web Api Action:

    public async Task<IHttpActionResult> AddUser(NewUserDTO {
        if (!ModelState.IsValid)
        {
            return BadRequest(ModelState);
        }
        if (!model.IdCliente.HasValue)
        {
            ModelState.AddModelError("", "No existe el cliente");
            return BadRequest(ModelState);
        }
        // do save stuff
        return Ok(TheModelFactory.Create(user));
    }
    
  • Client function:

    public async Task<ApplicationUserDTO> AddUser(NewUserDTO dto) {
        using (var client = new HttpClient()) {
            client.BaseAddress = new Uri(_urlBase);
            client.DefaultRequestHeaders.Accept.Clear();
            client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
            client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", Token);
            HttpContent content = new StringContent(JsonConvert.SerializeObject(dto));
            content.Headers.ContentType = new MediaTypeHeaderValue("application/json");
            HttpResponseMessage responseMessage = await client.PostAsync("api/accounts/AddUser", content);
            if (responseMessage.IsSuccessStatusCode) {
                var responseJson = await responseMessage.Content.ReadAsStringAsync();
                user = JsonConvert.DeserializeObject<ApplicationUserDTO>(responseJson);
            }
            else
                 MessageBox.Show(responseMessage.Content.ReadAsStringAsync().Result);
            return user;
        } 
    }
    

Anyone can help?

Edited:

  • DTO:

    [Serializable]
    public class NewUserDTO {
    public int? IdCliente { get; set; }
    [Required]
    public string UserName { get; set; }
    [Required]
    public string Email { get; set; }
    public string Role { get; set; }
    public string Password { get; set; } }
    

Anyway... the dto is sent correctly to api nut, here's the serialized dto as you asked for:

"{\"IdCliente\":null,\"UserName\":\"Toni\",\"Email\":\"[email protected]\",\"Role\":\"Filtra\",\"Password\":\"TONI\"}"
like image 538
Toni Moreno Avatar asked Feb 22 '16 01:02

Toni Moreno


1 Answers

API

return new BadRequestErrorMessageResult(yourErrorMessage);

Client

var errorMessage = responseMessage.Content.ReadAsStringAsync().GetAwaiter().GetResult();
MessageBox.Show(errorMessage);
like image 50
Sisyphus97 Avatar answered Oct 10 '22 04:10

Sisyphus97