[UWP] 在Windows Phone 10 or Win10 中透過 UDP 接收資料

2015-09-02

這寫法在目前Window 10 IoT 10.0.10240.16384 上面測試過是正常的，然後再Window Phone 10 目前上面測試也是正常的
目前範例按下按鈕後，會打開Port 1947 ，透過UDP接收資訊，收到後會用Dialog 跳出來..

C# code:

private async  void btnSend_Click(object sender, RoutedEventArgs e)

try

         //判斷如果重複開啟 就是直接提醒

         if (CoreApplication.Properties.ContainsKey("listener"))

             await new MessageDialog("您已經開啟接收端了，不用重複開啟").ShowAsync();

             return;

         //接收到之後

         datagramSocket.MessageReceived +=

            async delegate(DatagramSocket socket, DatagramSocketMessageReceivedEventArgs args)

try

                     //  throw  new Exception();

                     var reader = args.GetDataReader();

                     reader.UnicodeEncoding = Windows.Storage.Streams.UnicodeEncoding.Utf8;

                     string msg = reader.ReadString(reader.UnconsumedBufferLength);

                     await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.High, () =>

                         //收到後顯示

                         // args.RemoteAddress 可發送端的IP資訊

                         new MessageDialog("收到:" +args.RemoteAddress + " 。內容: " + msg).ShowAsync();

});

                 catch (Exception ex)

                     await new MessageDialog("錯誤:" + ex.Message).ShowAsync();

};

         CoreApplication.Properties.Add("listener", datagramSocket);

         //打開1947 port

         await datagramSocket.BindServiceNameAsync("1947");

         await new MessageDialog("成功開啟 Port 1947").ShowAsync();

     catch (Exception ex)

         await new MessageDialog("錯誤:"+ex.Message).ShowAsync();

結果:
開啟後

收到後

當麻許的超技八