Question

我们如何使用C＃从一个Windows项目向另一个Windows项目中发送简单数据（例如“ mango”）-异步进行？

这是客户端代码。

public partial class MainWindow : Window
{
    private Socket _clientSocket;
    private byte[] _buffer;

    public MainWindow()
    {
        InitializeComponent();
    }

    private void Window_Loaded(object sender, RoutedEventArgs e)
    {
        _clientSocket = new Socket(AddressFamily.InterNetwork, 
        SocketType.Stream, ProtocolType.Tcp);
        _clientSocket.BeginConnect(new IPEndPoint(IPAddress.Loopback, 
        3333), new AsyncCallback(ConnectCallback), null);
    }

    private void ConnectCallback(IAsyncResult AR)
    {
        _clientSocket.EndConnect(AR);
    }       

    private void SendCallback(IAsyncResult AR)
    {
        _clientSocket.EndSend(AR);
        _buffer = new byte[_clientSocket.ReceiveBufferSize];
    }

    private void btn1_Click(object sender, RoutedEventArgs e)
    {
        Click("MANGO");                     
    }

    private void btn2_Click(object sender, RoutedEventArgs e)
    {
        Click("GRAPES");            
    }

    public void Click(string xmlstring)
    {
        try
        {
            byte[] xmlbuffer = Encoding.ASCII.GetBytes(xmlstring);
             _clientSocket.BeginSend(xmlbuffer, 0, xmlbuffer.Length, 
             SocketFlags.None, new AsyncCallback(SendCallback), null);
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message);
        }
    }
}

服务器代码是

  public partial class Server : Window
  {
    private Socket _serversocket, _clientSocket;
    private byte[] _buffer;

    public Server()
    {
        InitializeComponent();
        StartServer();
    }

    private void Window_Loaded(object sender, RoutedEventArgs e)
    {
    }        

    private void StartServer()
    {
        _serversocket = new Socket(AddressFamily.InterNetwork, 
        SocketType.Stream, ProtocolType.Tcp);
        _serversocket.Bind(new IPEndPoint(IPAddress.Any, 3333));
        _serversocket.Listen(0);
        _serversocket.BeginAccept(new AsyncCallback(AcceptCallback), null);
    }

    private void AcceptCallback(IAsyncResult AR)
    {
        _clientSocket = _serversocket.EndAccept(AR);
        _buffer = new byte[_clientSocket.ReceiveBufferSize];
        _clientSocket.BeginReceive(_buffer, 0, _buffer.Length, 
         SocketFlags.None, new AsyncCallback(ReceiveCallback), null);
        _serversocket.BeginAccept(new AsyncCallback(AcceptCallback), 
        null);
    }

    private void ReceiveCallback(IAsyncResult AR)
    {
        int received = _clientSocket.EndReceive(AR);
        Array.Resize(ref _buffer, received);
        string text = Encoding.ASCII.GetString(_buffer); // here get ans
        Array.Resize(ref _buffer, _clientSocket.ReceiveBufferSize);
    }
}

当我单击button1时，“ mango”一词应该出现在服务器端。当我单击button2时，“ grapes”一词应该出现在服务器端。

当我第一次单击button1时，它将起作用，并且在服务器端显示“ mango”。但是第二次单击button2时，什么也没发生-“ grapes”一词并没有出现在服务器端。

请帮助纠正它。

Answer 1

尝试在_clientSocket.BeginReceive末尾致电ReceiveCallback。

从一个项目异步发送单个数据到另一个项目

1 个答案: