在Xamarin中使用Web API

Question

I've created a Web API in ASP.NET that is hosted on a web server. This Web API accesses a table in SQL Server where I have a table called Products with Id, ProductName, Description and Price , I did the tests via Postman and it is working correctly, but when I try to consume the method to bring a specific product via Xamarin application, I get the following error message in break mode:

System.Net.Http.HttpRequestException: Timeout exceeded getting exception details

public class DataService
{

    public async Task<List<Product>> GetProductAsync(string ProductName)
    {

        using (var client = new HttpClient())
        {

            string url = "http://ProductsAPI.hostname.com/api";

            try
            {

               var uri = url + "/" + ProductName.ToString();
               HttpResponseMessage response = await client.GetAsync(uri);
               var ProductJsonString = awaitresponse.Content.ReadAsStringAsync();
               var Product = JsonConvert.DeserializeObject<List<Product>>(ProductJsonString);

               return Product;

            }

            catch (Exception ex)

            {
                throw ex;
            }

        }

    }

}

Answer 1

Here's what I've used in the past:

public string GetAPIJsonAsync(string URL)
    {
        using (WebClient wc = new WebClient())
        {
            return wc.DownloadString(URL);
        }
    }

This would return the raw JSON to whoever called it, and I would then convert it to the desirable object.

Answer 2

If you increase the timeout of the HttpClient, does it return more information?

Also, try Refit It does all the work for you, including deserializing into json.

Answer 3

This Works Perfectly for me

  public static async Task<List<BranchMasterModel>> GetBranchList(int city)
    {
        var client = new HttpClient(new NativeMessageHandler());

        client.BaseAddress = new Uri(UrlAdd);//("http://192.168.101.119:8475/");
        client.DefaultRequestHeaders.Accept.Clear();
        client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
        client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", "AuthToken"));
        var result = await client.GetAsync("api/Master/V2/Branch/"+city);
        string branch = await result.Content.ReadAsStringAsync();
        var branches = JsonConvert.DeserializeObject<List<BranchMasterModel>>(branch);
        return branches;
    }