System.Reflection.TargetInvocationException: An exception occurred during the operation, making the result invalid.

Question

When I run my app on device and the internet is connected its ok, but if I use the emulator (althought the internet is connected):
$exception{System.Reflection.TargetInvocationException: An exception occurred during the operation, making the result invalid.  Check InnerException for exception details. ---> System.Net.WebException: The remote server returned
an error: NotFound. ---> System.Net.WebException: The remote server returned an error: NotFound.
   at System.Net.Browser.ClientHttpWebRequest.InternalEndGetResponse(IAsyncResult asyncResult)
   at System.Net.Browser.ClientHttpWebRequest.<>c__DisplayClasse.<EndGetResponse>b__d(Object sendState)
   at System.Net.Browser.AsyncHelper.<>c__DisplayClass1.<BeginOnUI>b__0(Object sendState)
   --- End of inner exception stack trace ---
   at System.Net.Browser.AsyncHelper.BeginOnUI(SendOrPostCallback beginMethod, Object state)
   at System.Net.Browser.ClientHttpWebRequest.EndGetResponse(IAsyncResult asyncResult)
   at System.Net.WebClient.GetWebResponse(WebRequest request, IAsyncResult result)
   at System.Net.WebClient.DownloadBitsResponseCallback(IAsyncResult result)
   --- End of inner exception stack trace ---
   at System.ComponentModel.AsyncCompletedEventArgs.RaiseExceptionIfNecessary()
   at System.Net.DownloadStringCompletedEventArgs.get_Result()
   at FitnessApp.BL.ServerConnection.wc_DownloadStringCompleted(Object sender, DownloadStringCompletedEventArgs e)
   at System.Net.WebClient.OnDownloadStringCompleted(DownloadStringCompletedEventArgs e)
   at System.Net.WebClient.DownloadStringOperationCompleted(Object arg)}
System.Exception {System.Reflection.TargetInvocationException}
this is the stack trace:
   at System.ComponentModel.AsyncCompletedEventArgs.RaiseExceptionIfNecessary()
   at System.Net.DownloadStringCompletedEventArgs.get_Result()
   at FitnessApp.BL.ServerConnection.wc_DownloadStringCompleted(Object sender, DownloadStringCompletedEventArgs e)
   at System.Net.WebClient.OnDownloadStringCompleted(DownloadStringCompletedEventArgs e)
   at System.Net.WebClient.DownloadStringOperationCompleted(Object arg)
this is my code:
void wc_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e)
try
if (e.Error != null)
string error = e.Error.Message;
string functionCall = e.UserState.ToString();
if (!string.IsNullOrEmpty(e.Result)) //this line throws an exception
if (functionCall == "getProductCode")
ProductsList productsList = JsonConvert.DeserializeObject<ProductsList>(e.Result);
if (productsList.products != null)
serverProducts = productsList.products.Select(p =>
new BE.Product
Product_code = p.PID,
Product_name = p.Name
}).ToList();
else
serverProducts.Clear();
if (DataDownloadCompleted != null)
if(functionCall =="getProductCode")
DataDownloadCompleted(this, new BE.StringEventArgs("getProductCode"));
catch (Exception)
throw;
public void searchProductCode(string productName)
try
if (DeviceNetworkInformation.IsNetworkAvailable && DeviceNetworkInformation.IsCellularDataEnabled)
wc.DownloadStringAsync(new Uri(baseURI + "get_products_json.php?search=" + productName), "getProductCode");
else
throw new Exception(FitnessApp.Resources.AppResources.ErrorServerConnection);
catch (Exception )
throw ;
Any solution?
thank you..

Answer 1

The server did not find the resource you asked for.
You might want to make sure your emulator is connected to the internet and can go online.
http://blogs.msdn.com/b/wsdevsol/archive/2013/10/01/why-can-t-the-windows-phone-emulator-go-online.aspx