private void MainWindow_Loaded(object sender, RoutedEventArgs e) { Task.Run(async () => { Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp); System.Net.IPAddress ip = System.Net.IPAddress.Parse("127.0.0.1"); IPEndPoint ippoint = new IPEndPoint(ip, 12345); socket.Bind(ippoint); socket.Listen(10); Socket socket1 = socket.Accept(); while (true) { if(socket1.Poll(10, SelectMode.SelectRead)) { byte[] buffer = new byte[1024]; int length = socket1.Receive(buffer); string message = Encoding.UTF8.GetString(buffer, 0, length); if (message != null) { MessageBox.Show("接收到消息：" + message); textBox1.Text = message; // 发送消息 string responseMessage = "已收到消息：" + message; byte[] responseBuffer = Encoding.UTF8.GetBytes(responseMessage); socket1.Send(responseBuffer); message = null; } } } }); }如何修改为只连接一次就时刻能收到客户端的消息

您可以将代码放在一个无限循环的 while(true) 循环中，不需要在 Load 事件中启动 Task.Run。在该循环中，使用 Receive 方法来接收客户端的消息，并使用 Send 方法向客户端发送响应消息。以下是修改后的示例代码：

private void MainWindow_Loaded(object sender, RoutedEventArgs e)
{
Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
System.Net.IPAddress ip = System.Net.IPAddress.Parse("127.0.0.1");
IPEndPoint ippoint = new IPEndPoint(ip, 12345);
socket.Bind(ippoint);
socket.Listen(10);

Socket socket1 = socket.Accept();

while (true)
{
byte[] buffer = new byte[1024];
int length = socket1.Receive(buffer);
string message = Encoding.UTF8.GetString(buffer, 0, length);
if (message != null)
{
MessageBox.Show("接收到消息：" + message);
textBox1.Text = message;

// 发送消息
string responseMessage = "已收到消息：" + message;
byte[] responseBuffer = Encoding.UTF8.GetBytes(responseMessage);
socket1.Send(responseBuffer);

message = null;
}
}
}

请注意，此代码仅适用于单个客户端连接。如果要处理多个客户端连接，请考虑使用多线程或异步编程来管理连接。