'HttpWebRequest' does not contain a definition for 'KeepAlive'

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  Hi,

  I am trying below code to utilize OneSignal in my application b ut getting:

  'HttpWebRequest' does not contain a definition for 'KeepAlive' and no extension method 'KeepAlive' accepting a first argument of type 'HttpWebRequest' could be found

  Also getting:

  'WebHeaderCollection' does not contain a definition for 'Add' and the best extension method overload 'SettersExtensions.Add(IList<Setter>, BindableProperty, object)' requires a receiver of type 'IList<Setter>'

  and:

  'HttpWebRequest' does not contain a definition for 'GetRequestStream' and no extension method 'GetRequestStream' accepting a first argument of type 'HttpWebRequest' could be found

  and:

  'HttpWebRequest' does not contain a definition for 'GetResponse' and no extension method 'GetResponse' accepting a first argument of type 'HttpWebRequest' could be found

  Here is the code:

  var request = WebRequest.Create("https://onesignal.com/api/v1/notifications") as HttpWebRequest;
  
  request.KeepAlive = true;
  request.Method = "POST";
  request.ContentType = "application/json; charset=utf-8";
  
  request.Headers.Add("authorization", "Basic MDFjZWMxeZDDctWYxxxjk2YPy1c3v0k0uiMpDkaysLxTgwyZqaTctzZcDYwYWQ4Y2M0ZjE1");
  
  byte[] byteArray = Encoding.UTF8.GetBytes("{"
                                            + "\"app_id\": \"6a9e00004f3593-fax05-4aaf7-9a3acd51a1-8312c3d3256e8b8a9a1\","
                                            + "\"headings\": {\"ar\": \"Arabic Heading\"},"
                                          + "\"contents\": {\"ar\": \"Arabic Message\"},"
                                          + "\"included_segments\": [\"All\"]}");
  
  string responseContent = null;
  
  try
  {
      using (var writer = request.GetRequestStream())
      {
          writer.Write(byteArray, 0, byteArray.Length);
      }
  
      using (var response = request.GetResponse() as HttpWebResponse)
      {
          using (var reader = new StreamReader(response.GetResponseStream()))
          {
              responseContent = reader.ReadToEnd();
          }
      }
  }
  catch (WebException ex)
  {
      DisplayAlert("Error", ex.Message, "OK");
      System.Diagnostics.Debug.WriteLine(new StreamReader(ex.Response.GetResponseStream()).ReadToEnd());
  }
  
  DisplayAlert("Notification", responseContent, "OK");
  

  
  

  Kindly help

  Thanks,

  Jassim

  • Moved by Zhanglong WuMicrosoft contingent staff Wednesday, November 29, 2017 7:56 AM Xamarin related

  Wednesday, November 15, 2017 11:21 AM