doubt to consume api

Question

I have the following service:

[HttpGet]
    [Route("save")]
    public async Task<dynamic> save(VendaModel[] venda, string CnpjEstab)
    {
        dynamic retorno = null;
        VendaModel ultima = new VendaModel();

       //TODO   
    }

I’m trying to consume this way:

public async static void SalvarArray(dynamic venda, string CnpjEstab)
    {
        string retorno;
        try
        {
            var url = UrlBase.urlBase + "/GetVendas/save";
            var a = new { venda, CnpjEstab };
            var json = JsonConvert.SerializeObject(a);

            var stringContent = new StringContent(json, UnicodeEncoding.UTF8, "application/json");

            HttpClient req = new HttpClient();
            HttpResponseMessage resp = await req.PostAsync(url, stringContent);

            if (resp.StatusCode == HttpStatusCode.OK)
            {
                retorno = resp.Content.ReadAsStringAsync().GetAwaiter().GetResult();
            }
        }
        catch (Exception err)
        {
            GeraLogError.GeraLog("GetVendas", MethodBase.GetCurrentMethod().Name, err.Message);
            retorno = err.Message;
        }

        //return retorno;
    }

but it is not working, the application is simply aborted (without any warning) , does not fall into the debug of the Api, has something wrong in the code ?

I’m using C#

Answer 1

Got it. If you want it synchronously, you don’t need to call Wait(), just return Result directly. The result blocks the call thread until the task is completed. In this case, until the post is set, you can use it as follows:

var serializedVendas = JsonConvert.SerializeObject(data);
var content = new StringContent(serializedVendas, Encoding.UTF8, "application/json");
var result = client.PostAsync ("api/vendas", content).Result;

I just tested with an example application and it worked. I had to create a fake api and a console application to understand what was happening with your test.
Good luck.
I hope I’ve helped.

Answer 2

Hello, friend! Your API is in an X url and you need to make it clear in the code.
Example:

req.BaseAddress = new Uri("http://localhost:5000/"); //para uma api com esse caminho.
req.DefaultRequestHeaders.Accept.Add(
                new MediaTypeWithQualityHeaderValue("application/json")
            );
var serializedVendas = JsonConvert.SerializeObject(data);
var content = new StringContent(serializedVendas, Encoding.UTF8, "application/json");
var result = await req.PostAsync("api/vendas", content); //caso essa seja sua rota

I hope I’ve helped.
Hugs,