Postasjsonasync Failure - Webapi - C#

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I made a WebAPI that by Postman I can make a CRUD but I created a Windows Forms C# pelo Visual Studio and I’m having some problems.

I can give a get and all my data is searched perfectly, only that while giving a post, apparently of a return Ok 200 do methodo Post, but nothing is created in my bank.

This is my controle:

public IHttpActionResult Post([FromBody]PROJETO projeto)
{
     var model = new ProjetoCriarEditarViewModel();
     model.CriarProjeto = _projetoBO.CriarProjeto(projeto);

     return Ok(model.CriarProjeto);
}

This is my C method#.

private async void button1_Click(object sender, EventArgs e)
{
    using (HttpClient client = new HttpClient())
    {
        client.BaseAddress = new Uri("http://localhost:19832/");


        PROJETO project = new PROJETO();
        project.NOME = textBox1.Text;
        project.DATA_INICIO = dateTimePicker1.Value;
        project.DATA_PREVISTA = dateTimePicker2.Value;
        project.TECNOLOGIA = textBox2.Text;
        project.VALOR = Convert.ToDecimal(textBox3.Text);
        project.STATUS_PROJETO = textBox4.Text;
        project.ID_CLIENTE = Convert.ToInt32(textBox6.Text);


        var resposta = await client.PostAsJsonAsync("/api/projetos/", project);
        bool retorno = await resposta.Content.ReadAsAsync<bool>();
    }
}
asp.net-web-api

  • just to be sure, your _projetoBO.CriarProjeto is giving commit at the end of the process?

  • Yes. I can post by Postman using the api and it creates perfectly in the database of my application. And I can also use "_projectBO.Criar projeto" in every app.

  • 1

    Put the [Httppost] attribute on top of your Controller?

  • 1

    I did not put it because he understands that it is a Post by the name of the method. So in this case it makes no difference.

  • @joaop.mr But did you test with the attribute? Do the post with the attribute through the code and not from Postman?

  • I tested for rs and nothing.

  • if already debugged? another thing inside this code: Create project?

  • I have debugged it. It returns the OK 200 post method. As if it had saved it. However it does not save.

  • Creating project is my method in the business rules that leads to the repository. Otherwise, I use the Entity Framework.

  • You have to debug the code from the repository!

  • But I can send by Postman. And I can also save in the application. I will anyway.

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1 answer

1

I will put an example of the method I use in my projects and to this day never gave me a headache. It’s a little different than yours, I think maybe these details will make a difference.

private async Task<bool> PostoToAPIAsync(PROJETO projeto)
{
    HttpClient client = new HttpClient();
    client.BaseAddress = new Uri("http://localhost:19832/api/");
    client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

    // Converte seu objeto para formato Json
    string json = JsonConvert.SerializeObject(projeto);

    // Espera o resultado
    HttpResponseMessage response = await client.PostAsync("projetos", new StringContent(json, Encoding.UTF8, "application/json"));

    // Verifica se o retorno é 200
    if (response.IsSuccessStatusCode)
    {
        return true;
    }

    return false;
}

Note that I changed the address of your API and put a / in the end:

http://localhost:19832/api/

And I removed the / of your API method:

projetos

Also, understand that the method I’ve created is async, then you should call it as follows:

PROJETO project = new PROJETO();
project.NOME = textBox1.Text;
project.DATA_INICIO = dateTimePicker1.Value;
project.DATA_PREVISTA = dateTimePicker2.Value;
project.TECNOLOGIA = textBox2.Text;
project.VALOR = Convert.ToDecimal(textBox3.Text);
project.STATUS_PROJETO = textBox4.Text;
project.ID_CLIENTE = Convert.ToInt32(textBox6.Text);

if(await PostoToAPIAsync(project))
{
   // Criado com sucesso
}
else
{
   // Erro ao criar
}

  • Thanks for the tip. I did exactly that friend. I continue with the same problem. It returns success but does not record anything in the bank.

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