Question

我在连接客户端时调用了此Server方法：

class Server {
    protected override void clientIn(TcpClient client)//Called when a Client comes in
    {
        NetworkStream stream = client.GetStream();
        byte[] y = new byte[client.ReceiveBufferSize];
        objectState state = new objectState();
        state.buffer = y;
        state.user = client;
        stream.BeginRead(y, 0, y.Length, read, state);
    }

    public void read(IAsyncResult ar)
    {

        Console.WriteLine("GetData");
        objectState state = (objectState)ar.AsyncState;
        byte[] buffer = state.buffer;

        TcpClient client = state.user;
        int byte=client.GetStream().EndRead(ar);
        client.GetStream().BeginRead(buffer, 0, client.ReceiveBufferSize, read, state);

        String text = Encoding.ASCII.GetString(buffer);
        Console.WriteLine(text);

    }       
}

class objectState
{
    public TcpClient user;
    public byte[] buffer;
}

我从两个不同的客户端发送两个数据，我的问题是：

如果我不执行指令＆＃34; Console.WriteLine（text）;＆＃34;，在控制台中我得到2次消息＆＃34; GetData＆＃34;（这意味着我从2个客户端获取数据），

但如果我执行指令＆＃34; Console.WriteLine（text）;＆＃34;，在控制台中我得到1次消息＆＃34; GetData＆＃34;以及刚刚得到的数据。它是第一个客户的数据，第二个客户的数据丢失但我不明白为什么。

你能帮助我吗？

感谢您的时间

更新：

我以这种方式编辑了代码并且工作正常，但我不明白为什么：

    protected override void clientIn(TcpClient client) 
            {
                objectState state = new objectState();
                state.user = client;
                state.buffer= new byte[client.ReceiveBufferSize];

                client.Client.BeginReceive(state.buffer, 0, client.ReceiveBufferSize, 0, new AsyncCallback(read), state);

            }

public void read(IAsyncResult ar)
        {

            Console.WriteLine("GetData");
            objectState state = (objectState)ar.AsyncState;

            TcpClient client = stato.user;

            int dataSize = client.Client.EndReceive(ar);
            String data = "";

            data = Encoding.ASCII.GetString(state.buffer, 0,dataSize);
            Console.WriteLine("\n "+data);

            client.Client.BeginReceive(stato.buffer, 0, client.ReceiveBufferSize, 0, new AsyncCallback(read), state);
        }

我以前不明白哪里出错了。

更新2：

 public void read(IAsyncResult ar)
        {


        Console.WriteLine("GetData");
        objectState state = (objectState)ar.AsyncState;
        byte[] buffer = state.buffer;

        TcpClient client = state.user;
        int dataSize=client.GetStream().EndRead(ar);
        String text = Encoding.ASCII.GetString(buffer);
        state.buffer = new byte[client.ReceiveBufferSize];//new buffer
        client.GetStream().BeginRead(state.buffer, 0, client.ReceiveBufferSize, read, state);
        Console.WriteLine(text);

       }

ASync TCP客户端/服务器问题

0 个答案: