fix logic

SocketStudy/ClientForm/MainForm.cs

@@ -17,7 +17,7 @@ namespace ClientForm
 {
 	public partial class MainForm : Form
 	{
-		private readonly string SERVER_IP = "124.56.13.173";
+		private readonly string SERVER_IP = "10.233.96.172";//"124.56.13.173";
 
 		private PClient heartBeatClient;
 		private PClient client;

SocketStudy/PComm/PClient.cs

@@ -59,8 +59,8 @@ namespace PComm
 
 		public void Connect()
 		{
-			if (socket == null || socket.Connected)
+			if (socket == null || !socket.Connected)
-				return;
+				socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
 
 			socket.Connect(this.EndPoint);
 
@@ -224,6 +224,9 @@ namespace PComm
 
 		private bool CheckSocketConnection(Socket socket)
 		{
+			if (!socket.Connected)
+				return false;
+
 			bool availability = socket.Available == 0;
 			bool poll = socket.Poll(1000, SelectMode.SelectRead);
 			if (availability && poll)