基本的に、クライアントとサーバーの 2 つの C# アプリケーションを作成しました。クライアントは (ソケット経由で) サーバーに接続し、テキストを含むパケットを送信します。サーバーは応答する必要があります。私の問題は、サーバーが閉じたとき（ALT + F4）にのみ応答パケットを送信（またはクライアントが受信）することです。助けてほしい。両方のプロジェクトのソース コードの下にコピーペーストします。クライアント：
public class StateObject
{
public Socket skt = null;
public const int BufferSize = 256;
public byte[] buffer = new byte[BufferSize];
public StringBuilder sb = new StringBuilder();
}
public class AsynchronousClient
{
private const int port = 11000;
private static ManualResetEvent connectDone =
new ManualResetEvent(false);
private static ManualResetEvent sendDone =
new ManualResetEvent(false);
private static ManualResetEvent receiveDone =
new ManualResetEvent(false);
private static String response = String.Empty;
public static string command;
public static Socket client;
public static void StartClient()
{
try
{
IPHostEntry ipHostInfo = Dns.GetHostEntry(IPAddress.Parse("127.0.0.1"));
IPAddress ipAddress = ipHostInfo.AddressList[0];
IPEndPoint remoteEP = new IPEndPoint(IPAddress.Parse("127.0.0.1"), port);
client = new Socket(AddressFamily.InterNetwork,
SocketType.Stream, ProtocolType.Tcp);
client.BeginConnect(remoteEP,
new AsyncCallback(ConnectCallback), client);
connectDone.WaitOne();
while (true)
{
command = Console.ReadLine();
if (command == "exit")
{
Console.WriteLine("Terminating...");
client.Shutdown(SocketShutdown.Both);
client.Close();
Environment.Exit(0);
}
else
{
Send(client, command + "<EOF>");
sendDone.WaitOne();
Receive(client);
receiveDone.WaitOne();
Console.WriteLine("Response received : {0}", ProcessResponse(response));
client.Shutdown(SocketShutdown.Both);
client.Close();
}
//Console.CancelKeyPress += (sender, e) =>
//{
// Console.WriteLine("Terminating...");
// client.Shutdown(SocketShutdown.Both);
// client.Close();
// Environment.Exit(0);
//};
}
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
}
static public string ProcessResponse(string pkt)
{
string response = null;
response = pkt.Replace("<EOF>","");
return response;
}
private static void ConnectCallback(IAsyncResult ar)
{
try
{
Socket client = (Socket)ar.AsyncState;
client.EndConnect(ar);
Console.WriteLine("Socket connected to {0}",
client.RemoteEndPoint.ToString());
connectDone.Set();
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
}
private static void Receive(Socket client)
{
try
{
StateObject state = new StateObject();
state.skt = client;
client.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0,
new AsyncCallback(ReceiveCallback), state);
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
}
private static void ReceiveCallback(IAsyncResult ar)
{
try
{
StateObject state = (StateObject)ar.AsyncState;
Socket client = state.skt;
int bytesRead = client.EndReceive(ar);
if (bytesRead > 0)
{
state.sb.Append(Encoding.ASCII.GetString(state.buffer, 0, bytesRead));
client.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0,
new AsyncCallback(ReceiveCallback), state);
}
else
{
if (state.sb.Length > 1)
{
response = state.sb.ToString();
}
receiveDone.Set();
}
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
}
private static void Send(Socket client, String data)
{
byte[] byteData = Encoding.ASCII.GetBytes(data);
client.BeginSend(byteData, 0, byteData.Length, 0, new AsyncCallback(SendCallback), client);
}
private static void SendCallback(IAsyncResult ar)
{
try
{
Socket client = (Socket)ar.AsyncState;
int bytesSent = client.EndSend(ar);
Console.WriteLine("Sent {0} bytes to server.", bytesSent);
sendDone.Set();
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
}
public static int Main(String[] args)
{
StartClient();
return 0;
}
サーバ：
public class Program
{
public class StateObject
{
public Socket skt = null;
public const int buffersize = 1024;
public byte[] buffer = new byte[buffersize];
public StringBuilder sb = new StringBuilder();
}
public class AsynchronousSocketListener
{
public static ManualResetEvent allDone = new ManualResetEvent(false);
public AsynchronousSocketListener() { }
public static Socket handler;
public static void StartListening()
{
byte[] bytes = new Byte[1024];
IPHostEntry ipHostInfo = Dns.Resolve(Dns.GetHostName());
IPAddress ipAddress = ipHostInfo.AddressList[0];
IPEndPoint localEndPoint = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 11000);
Socket listener = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
try
{
listener.Bind(localEndPoint);
listener.Listen(100);
while (true)
{
allDone.Reset();
Console.WriteLine("Waiting for a connection...");
listener.BeginAccept(
new AsyncCallback(AcceptCallback),
listener);
allDone.WaitOne();
}
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
Console.WriteLine("\nPress ENTER to continue...");
Console.Read();
}
public static void AcceptCallback(IAsyncResult ar)
{
allDone.Set();
Socket listener = (Socket)ar.AsyncState;
Socket handler = listener.EndAccept(ar);
StateObject state = new StateObject();
state.skt = handler;
handler.BeginReceive(state.buffer, 0, StateObject.buffersize, 0, new AsyncCallback(ReadCallback), state);
}
public static void ReadCallback(IAsyncResult ar)
{
String content = String.Empty;
StateObject state = (StateObject)ar.AsyncState;
Socket handler = state.skt;
int bytesRead = handler.EndReceive(ar);
if (bytesRead > 0)
{
state.sb.Append(Encoding.ASCII.GetString(
state.buffer, 0, bytesRead));
content = state.sb.ToString();
if (content.IndexOf("<EOF>") > -1)
{
Console.WriteLine("Read {0} bytes from socket. \n Data : {1}", content.Length, ProcessResponse(content));
Send(handler, content);
}
else
{
handler.BeginReceive(state.buffer, 0, StateObject.buffersize, 0,
new AsyncCallback(ReadCallback), state);
}
}
}
private static void Send(Socket handler, String data)
{
byte[] byteData = Encoding.ASCII.GetBytes(data);
handler.BeginSend(byteData, 0, byteData.Length, 0, new AsyncCallback(SendCallback), handler);
}
private static void SendCallback(IAsyncResult ar)
{
try
{
handler = (Socket)ar.AsyncState;
int bytesSent = handler.EndSend(ar);
Console.WriteLine("Sent {0} bytes to client.", bytesSent);
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
}
static public string ProcessResponse(String pkt)
{
string response = null;
response = pkt.Replace("<EOF>", "");
return response;
}
}
public static void Main(string[] args)
{
AsynchronousSocketListener.StartListening();
}
}