C#

<br />
[global::System.Configuration.ApplicationScopedSettingAttribute()]<br />
        [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]<br />
        [global::System.Configuration.SpecialSettingAttribute(global::System.Configuration.SpecialSetting.ConnectionString)]<br />
        [global::System.Configuration.DefaultSettingValueAttribute("Default Connetction string")]<br />
        public string Setting {<br />
            get {<br />
                return ((string)(this["Setting"]));<br />
            }<br />
//add this set method for this properit<br />
            set<br />
            {<br />
                this["Setting"] = value;<br />
            }<br />
        }<br />

mrithula8 wrote:

Any ideas why it throws the exception and how to solve it?

private void SendMessage()
        {
            try
            {
                listBox6.Items.Add("Connecting....");
  IPEndPoint ipep = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 8050);
Socket sock = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
 sock.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.SendBuffer, 1);
              listBox6.Items.Add("Connected");
                byte[] data = new byte[1024];
                String snd = "hello";
                data = Encoding.ASCII.GetBytes(snd);
                listBox6.Items.Add("Transmitting...");
sock.SendTo(data, 0,data.Length, SocketFlags.None, ipep);//sent hello                
                listBox6.Items.Add("Sent...");
             EndPoint tmpRemote = (EndPoint)ipep;
                listBox6.Items.Add("Message received from {0}:");
                listBox6.Items.Add(ipep.ToString());
                data = new byte[1024];
  int recv = sock.ReceiveFrom(data,0,data.Length, SocketFlags.None, ref tmpRemote);
                String zz=Encoding.ASCII.GetString(data, 0, recv);
                listBox6.Items.Add(zz);
                if (zz == "Welcome to the Server")
                {
                    lb9.Text = "Active";
                    lb9.BackColor = Color.Green;
                }
                else{
                    lb9.Text = "Inactive";
                    lb9.BackColor=Color.Red;
                }            
            }

            catch (SocketException e)
            {
                //Console.WriteLine("Error..... " + e.StackTrace);
                MessageBox.Show(e.Message);

            }
        }

public static void start_server()
        {
            IPEndPoint ipep = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 8050);
            Socket newsock = new Socket(AddressFamily.InterNetwork , SocketType.Dgram, ProtocolType.Udp);
            newsock.Bind(ipep);
            Console.WriteLine("Waiting for a client...");
            while (true)
            {
                try
                {
                    EndPoint tmpRemote = (EndPoint)ipep;
                    byte[] data = new byte[1024];
                    Console.WriteLine("hai");
                    int recv = newsock.ReceiveFrom(data, 0, data.Length, SocketFlags.None, ref tmpRemote);
                    Console.WriteLine("gfgjfk");
      Console.WriteLine("Message received from {0}:", tmpRemote.ToString());
   Console.WriteLine(Encoding.ASCII.GetString(data, 0, recv));//hello is received  
                    String st = data.ToString();
                    data = new byte[1024];
                    string ss = "Welcome to the Server";
                    data = Encoding.ASCII.GetBytes(ss);
                    newsock.SendTo(data,0, data.Length, SocketFlags.None, tmpRemote);
                    Console.WriteLine("\nSent Acknowledgement");
                }
                catch (SocketException e)
                {
                    Console.WriteLine(e.Message);
                }
              }
        }