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异步套接字C#发送数据但不接收_C#_Sockets - Fatal编程技术网

异步套接字C#发送数据但不接收

异步套接字C#发送数据但不接收,c#,sockets,C#,Sockets,这是我的密码。我正在成功发送数据,但未接收任何数据。下面是我的代码。我实际上是通过套接字发送23个字节,它执行事件,但它没有接收到数据,服务器正在发回。我希望有持久的双向连接来发送和接收数据 using System; using System.Net; using System.Net.Sockets; using System.Threading; using System.Text; using System.Collections.Generic; // State object fo

这是我的密码。我正在成功发送数据,但未接收任何数据。下面是我的代码。我实际上是通过套接字发送23个字节,它执行事件,但它没有接收到数据,服务器正在发回。我希望有持久的双向连接来发送和接收数据

using System;
using System.Net;
using System.Net.Sockets;
using System.Threading;
using System.Text;
using System.Collections.Generic;

// State object for receiving data from remote device.
public class StateObject
{
    // Client socket.
    public Socket workSocket = null;
    // Size of receive buffer.
    public const int BufferSize = 256;
    // Receive buffer.
    public byte[] buffer = new byte[BufferSize];
    // Received data string.
    public StringBuilder sb = new StringBuilder();
}

public class AsynchronousClient
{
    // The port number for the remote device.
    private const int port = 18001;

    // ManualResetEvent instances signal completion.
    private static ManualResetEvent connectDone =
        new ManualResetEvent(false);
    private static ManualResetEvent sendDone =
        new ManualResetEvent(false);
    private static ManualResetEvent receiveDone =
        new ManualResetEvent(false);

    // The response from the remote device.
    private static String response = String.Empty;

    private static void StartClient()
    {
        // Connect to a remote device.
        try
        {


            IPEndPoint remoteEP = new IPEndPoint(IPAddress.Parse("192.168.1.140"), port);

            // Create a TCP/IP socket.
            Socket client = new Socket(AddressFamily.InterNetwork,SocketType.Stream, ProtocolType.Tcp);
            // Connect to the remote endpoint.
            client.BeginConnect(remoteEP, new AsyncCallback(ConnectCallback), client);
            connectDone.WaitOne();

            // Send test data to the remote device.
            Send(client, "This is a test<EOF>");
            sendDone.WaitOne();

            // Receive the response from the remote device.
            Receive(client);
            receiveDone.WaitOne();

            // Write the response to the console.
            Console.WriteLine("Response received : {0}", response);

            // Release the socket.
            client.Shutdown(SocketShutdown.Both);
            client.Close();

        }
        catch (Exception e)
        {
            Console.WriteLine(e.ToString());
        }
    }

    private static void ConnectCallback(IAsyncResult ar)
    {
        try
        {
            // Retrieve the socket from the state object.
            Socket client = (Socket)ar.AsyncState;

            // Complete the connection.
            client.EndConnect(ar);

            Console.WriteLine("Socket connected to {0}",
                client.RemoteEndPoint.ToString());

            // Signal that the connection has been made.
            connectDone.Set();
        }
        catch (Exception e)
        {
            Console.WriteLine(e.ToString());
        }
    }

    private static void Receive(Socket client)
    {
        try
        {
            // Create the state object.
            StateObject state = new StateObject();
            state.workSocket = client;

            // Begin receiving the data from the remote device.
            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.workSocket;

            // Read data from the remote device.
            int bytesRead = client.EndReceive(ar);

            if (bytesRead > 0)
            {
                // There might be more data, so store the data received so far.
                state.sb.Append(Encoding.ASCII.GetString(state.buffer, 0, bytesRead));

                // Get the rest of the data.
                client.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0,
                    new AsyncCallback(ReceiveCallback), state);
            }
            else
            {
                // All the data has arrived; put it in response.
                if (state.sb.Length > 1)
                {
                    response = state.sb.ToString();
                }
                // Signal that all bytes have been received.
                receiveDone.Set();
            }
        }
        catch (Exception e)
        {
            Console.WriteLine(e.ToString());
        }
    }

    private static void Send(Socket client, String data)
    {

        // F2 00 DATA FF

        List<byte> byteTemp = new List<byte>();
        byteTemp.Add(0XF2);
        byteTemp.Add(0X00);


        byte[] TcpData = Encoding.ASCII.GetBytes("0040005001100180");
        foreach (byte eachdata in TcpData)
        {
            byteTemp.Add(eachdata);
        }

        byteTemp.Add(0XFF);

        byte[] byteData = byteTemp.ToArray();




        client.BeginSend(byteData, 0, byteData.Length, 0,
            new AsyncCallback(SendCallback), client);
    }

    private static void SendCallback(IAsyncResult ar)
    {
        try
        {
            // Retrieve the socket from the state object.
            Socket client = (Socket)ar.AsyncState;

            // Complete sending the data to the remote device.
            int bytesSent = client.EndSend(ar);
            Console.WriteLine("Sent {0} bytes to server.", bytesSent);

            // Signal that all bytes have been sent.
            sendDone.Set();
        }
        catch (Exception e)
        {
            Console.WriteLine(e.ToString());
        }
    }

    public static int Main(String[] args)
    {
        StartClient();
        return 0;
    }
}
使用系统;
Net系统;
使用System.Net.Sockets;
使用系统线程;
使用系统文本;
使用System.Collections.Generic;
//用于从远程设备接收数据的状态对象。
公共类状态对象
{
//客户端套接字。
公共套接字工作组=null;
//接收缓冲区的大小。
public const int BufferSize=256;
//接收缓冲区。
公共字节[]缓冲区=新字节[BufferSize];
//接收到的数据字符串。
公共StringBuilder sb=新StringBuilder();
}
公共类异步客户端
{
//远程设备的端口号。
专用常量int端口=18001;
//ManualResetEvent实例信号完成。
专用静态手动重置事件已完成=
新手动重置事件(错误);
私有静态手动重置事件sendDone=
新手动重置事件(错误);
私有静态手动重置事件接收完成=
新手动重置事件(错误);
//来自远程设备的响应。
私有静态字符串响应=String.Empty;
私有静态void StartClient()
{
//连接到远程设备。
尝试
{
IPEndPoint remoteEP=新IPEndPoint(IPAddress.Parse(“192.168.1.140”),端口);
//创建TCP/IP套接字。
Socket client=新套接字(AddressFamily.InterNetwork、SocketType.Stream、ProtocolType.Tcp);
//连接到远程端点。
BeginConnect(remoteEP,新的异步回调(ConnectCallback),client);
connectDone.WaitOne();
//将测试数据发送到远程设备。
发送(客户端,“这是一个测试”);
sendDone.WaitOne();
//从远程设备接收响应。
接收(客户);
receiveDone.WaitOne();
//将响应写入控制台。
WriteLine(“收到的响应:{0}”,响应);
//松开插座。
client.Shutdown(SocketShutdown.Both);
client.Close();
}
捕获(例外e)
{
Console.WriteLine(如ToString());
}
}
专用静态无效连接回调(IAsyncResult ar)
{
尝试
{
//从状态对象检索套接字。
套接字客户端=(套接字)ar.AsyncState;
//完成连接。
客户端.EndConnect(ar);
WriteLine(“连接到{0}的套接字”,
client.RemoteEndPoint.ToString());
//表示已建立连接的信号。
connectDone.Set();
}
捕获(例外e)
{
Console.WriteLine(如ToString());
}
}
私有静态void接收(套接字客户端)
{
尝试
{
//创建状态对象。
StateObject状态=新的StateObject();
state.workSocket=客户端;
//开始从远程设备接收数据。
client.BeginReceive(state.buffer,0,StateObject.BufferSize,0,
新建异步回调(ReceiveCallback),状态);
}
捕获(例外e)
{
Console.WriteLine(如ToString());
}
}
私有静态void ReceiveCallback(IAsyncResult ar)
{
尝试
{
StateObject状态=(StateObject)ar.AsyncState;
套接字客户端=state.workSocket;
//从远程设备读取数据。
int bytesRead=client.EndReceive(ar);
如果(字节读取>0)
{
//可能会有更多数据,因此请存储到目前为止收到的数据。
state.sb.Append(Encoding.ASCII.GetString(state.buffer,0,bytesRead));
//获取其余的数据。
client.BeginReceive(state.buffer,0,StateObject.BufferSize,0,
新建异步回调(ReceiveCallback),状态);
}
其他的
{
//所有数据都已到达,请将其作为响应。
如果(说明长度>1)
{
response=state.sb.ToString();
}
//表示已接收到所有字节的信号。
receiveDone.Set();
}
}
捕获(例外e)
{
Console.WriteLine(如ToString());
}
}
私有静态void发送(套接字客户端、字符串数据)
{
//F200数据帧
List byteTemp=新列表();
byteTemp.Add(0XF2);
byteTemp.Add(0X00);
字节[]TcpData=Encoding.ASCII.GetBytes(“0040005001100180”);
foreach(TcpData中的字节eachdata)
{
byteTemp.Add(每个数据);
}
byteTemp.Add(0XFF);
字节[]byteData=byteTemp.ToArray();
client.BeginSend(byteData,0,byteData.Length,0,
新的异步回调(SendCallback),客户端);
}
私有静态void SendCallback(IAsyncResult ar)
{
尝试
{
//从状态对象检索套接字。
套接字客户端=(套接字)ar.AsyncState;
//完成将数据发送到远程设备。
int bytesent=client.EndSend(ar);
WriteLine(“向服务器发送了{0}个字节。”,bytesSent);
//表示已发送所有字节的信号。
sendDone.Set();
}
捕获(例外e)
{
Console.WriteLine(如ToString());
}
}
公共静态int Main(字符串[]args)
{
StartClient();
返回0;
}
}
数据已被接收,但未被用作
private static void ReceiveCallback(IAsyncResult ar)
{     
    try
    {
        Console.WriteLine("Receieve Call Back Invoked");

        StateObject state = (StateObject)ar.AsyncState;
        Socket client = state.workSocket;

        // Read data from the remote device.
        int bytesRead = client.EndReceive(ar);
        Console.WriteLine("Receieve End Receieve");
        if (bytesRead > 0)
        {
            // There might be more data, so store the data received so far.
            state.sb.Append(Encoding.ASCII.GetString(state.buffer, 0, bytesRead));
            Console.WriteLine("Read : " + bytesRead.ToString());
            // Get the rest of the data.
            client.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0,
                new AsyncCallback(ReceiveCallback), state);
            Console.WriteLine("Begin Receieve completed");
        }
        else
        {
            // All the data has arrived; put it in response.
            if (state.sb.Length > 1)
            {
                response = state.sb.ToString();
            }
            Console.WriteLine("Received data from client");
            // Signal that all bytes have been received.
            receiveDone.Set();
        }
        Console.WriteLine("completed receive callback");
    }
    catch (Exception e)
    {
        Console.WriteLine(e.ToString());
    }
}