calling webapi from windows client - c# - set datagridview.datasource - JArray- task await-

wepapideki listeyi windows client uygulaması datagridview datasource olarak atamak.

** winform *GetProductAsync*
private HttpClient client = new HttpClient();

private string apiListAdress = "http://localhost/WapiNW/api/Products/GetUrunListesi";

private void FormListe_Shown(object sender, EventArgs e)

{

client.BaseAddress = new Uri(apiListAdress);

client.DefaultRequestHeaders.Accept.Clear();

client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

}

private async void buttonListele_Click(object sender, EventArgs e)

{

var product = await GetProductAsync(apiListAdress);

try

{

//..............................

this.dataGridView1.DataSource = product; 

//..............................

}

catch (Exception ex)

{

MessageBox.Show(ex.Message);

return;

} 

}

private async Task<JArray> GetProductAsync(string path)
{
  //............................
HttpResponseMessage responseMSG = await client.GetAsync(path);
//............................ 
if (responseMSG.IsSuccessStatusCode)
{
var webR = (HttpWebRequest)WebRequest.Create(path);
var response = (HttpWebResponse)webR.GetResponse();

var reader = new StreamReader(response.GetResponseStream());
string s = reader.ReadToEnd();

var product = JsonConvert.DeserializeObject<JArray>(s);

return product;

}

return null;

}

** webApi*GetUrunListesi*

//tablo : Northwind database Products ..

public IEnumerable GetUrunListesi()

{

var lst = (from u in db.Products

  select new

{

u.ProductID

,u.ProductName

,u.UnitPrice

,u.SupplierID

,u.CategoryID

,u.QuantityPerUnit

,u.UnitsInStock

,u.UnitsOnOrder

,u.ReorderLevel

,u.Discontinued

,u.Categories.CategoryName

,u.Categories.Picture

}).ToList();

return lst;

}

** webApi*WebApiConfig*

 public static class WebApiConfig

    {

        public static void Register(HttpConfiguration config)

        {

             config.MapHttpAttributeRoutes();

config.Routes.MapHttpRoute("api/Products/GetUrunListesi"

, "api/Products/GetUrunListesi"

, new { Controller = "Products"

, Action = "GetUrunListesi" }

);

 

config.Routes.MapHttpRoute(

                name: "DefaultApi",

                routeTemplate: "api/{controller}/{id}",

                defaults: new { id = RouteParameter.Optional }

            ); 

        }

    }