fix tcp server stop error.

Author: seayxu

build/version.props

@@ -1,6 +1,6 @@
 <Project>
   <PropertyGroup Condition="'$(AssemblyName)'=='GodSharp.Socket'">
     <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
-    <Version>1.0.2-preview5</Version>
+    <Version>1.0.2-preview6</Version>
   </PropertyGroup>
 </Project>

sample/Tcp/Chat/GodSharp.Chat/UI/Server/FormServer.cs

@@ -32,7 +32,7 @@ private void FormServer_Load(object sender, EventArgs e)
 
         private void btnStart_Click(object sender, EventArgs e)
         {
-            if (server?.Running==true)
+            if (server?.Running == true)
             {
                 return;
             }
@@ -58,8 +58,8 @@ private void btnStop_Click(object sender, EventArgs e)
                 server.Stop();
             }
 
-            btnStart.Enabled = server.Running;
-            btnStop.Enabled = !server.Running;
+            btnStart.Enabled = !server.Running;
+            btnStop.Enabled = server.Running;
         }
 
         private void OnConnected(TcpSender sender)

src/GodSharp.Socket/Tcp/Client/SocketClient.cs

@@ -35,6 +35,11 @@ public partial class SocketClient:SocketBase
         /// </value>
         public EndPoint RemoteEndPoint => socket.RemoteEndPoint;
 
+        /// <summary>
+        /// Local Port
+        /// </summary>
+        public int LocalPort { get; set; } = 0;
+
         /// <summary>
         /// Initializes a new instance of the <see cref="SocketClient"/> class.
         /// </summary>
@@ -43,7 +48,7 @@ public SocketClient()
         }
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="Client"/> class.
+        /// Initializes a new instance of the <see cref="SocketClient"/> class.
         /// </summary>
         /// <param name="host">The host.</param>
         /// <param name="port">The port.</param>
@@ -56,6 +61,31 @@ public SocketClient(string host,int port)
             socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
         }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="SocketClient"/> class.
+        /// </summary>
+        /// <param name="host">The host.</param>
+        /// <param name="port">The port.</param>
+        /// <param name="localPort">The local port.</param>
+        public SocketClient(string host, int port, int localPort)
+        {
+            SetHost(host);
+
+            SetPort(port);
+
+            Exception ex = Utils.ValidatePort(localPort);
+            if (ex == null)
+            {
+                LocalPort = localPort;
+            }
+            else
+            {
+                throw ex;
+            }
+
+            socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
+        }
+
         /// <summary>
         /// Connects this instance.
         /// </summary>
@@ -138,6 +168,14 @@ public void Connect(string host, int port)
 
                 SetPort(port);
 
+                // bind local port
+                if (LocalPort > 0)
+                {
+                    EndPoint endPoint = new IPEndPoint(IPAddress.Any, LocalPort);
+
+                    socket.Bind(endPoint);
+                }
+
                 socket.Connect(Host, Port);
 
                 listener?.Stop();

src/GodSharp.Socket/Tcp/Server/SocketServer.cs

@@ -182,19 +182,36 @@ public override void Stop()
         {
             try
             {
+                Running = false;
+
                 foreach (var item in listeners)
                 {
-                    item.Value?.Stop();
+                    try
+                    {
+                        item.Value?.Stop();
+                    }
+                    catch (Exception ex)
+                    {
+#if DEBUG
+                        Console.WriteLine(ex.Message);
+#endif
+                    }
                 }
 
                 clients.Clear();
                 clientMap.Clear();
                 listeners.Clear();
 
-                if (socket.Connected)
+                try
                 {
                     socket.Close();
                 }
+                catch (Exception ex)
+                {
+#if DEBUG
+                    Console.WriteLine(ex.Message);
+#endif
+                }
             }
             catch (Exception ex)
             {
@@ -232,7 +249,19 @@ private void AcceptFun()
             {
                 try
                 {
-                    Socket _socket = socket.Accept();
+                    Socket _socket = null;
+                    try
+                    {
+                        _socket = socket.Accept();
+                    }
+                    catch (Exception ex)
+                    {
+#if DEBUG
+                        Console.WriteLine(ex.Message);
+#endif
+                    }
+
+                    if (!Running) break;
 
                     // keep alive
                     if (KeepAlive)
@@ -280,6 +309,7 @@ private void AcceptFun()
                     throw new Exception(ex.Message, ex);
                 }
             }
+
             Running = false;
         }