你好,我有一个在服务器应用程序中的断开按钮点击事件,代码如下。在执行断开操作之前,它会通过发送“/exit”命令来通知其他客户端。然后关闭它的连接。
private void stopButton_Click(object sender, EventArgs e)
{
byte[] exit_command = Encoding.ASCII.GetBytes("/exit");
g_server_conn.BeginSend(exit_command, 0, exit_command.Length, SocketFlags.None, new AsyncCallback(Send), g_server_conn);
g_server_conn.Shutdown(SocketShutdown.Both);
g_server_conn.Close();
}
问题在于服务器一直在执行Socket.BeginReceive()方法。我们该如何告诉BeginReceive方法停止操作,以便我可以正确地关闭它。
私有void Accept(IAsyncResult iar) {
Socket winsock = (Socket)iar.AsyncState;
g_server_conn = winsock.EndAccept(iar);
//Function that exchanges names of each other
NewClient(g_server_conn);
Socket server_conn = g_server_conn;
chat_msg = new byte[1024];
server_conn.BeginReceive(chat_msg, 0, chat_msg.Length, SocketFlags.None, new AsyncCallback(Recieve), server_conn);
}
private void Recieve(IAsyncResult iar)
{
Socket server_conn = (Socket)iar.AsyncState;
server_conn.EndReceive(iar);
//If clients shutdown connection,Server recieves /exit command
if (Encoding.ASCII.GetString(chat_msg, 0, chat_msg.Length) == "/exit")
{
g_server_conn.Shutdown(SocketShutdown.Both);
g_server_conn.Close();
return;
}
SetLabel(client_name, chatListBox);
SetLabel(Encoding.ASCII.GetString(chat_msg), chatListBox);
chat_msg = new byte[1024];
server_conn.BeginReceive(chat_msg, 0, chat_msg.Length, SocketFlags.None, new AsyncCallback(Recieve), server_conn);
}