socket异步通讯问题

[FantasyFreed]

我用SOCKET异步写了一个客户端和一个服务端，我在客户端连续发出几条信息，可服务端只接收到了第一条信息，以后的信息都没有接收到，请问这是怎么回事？

[max8max]

一收到信息后就断开连接，再发时再连上，可不可以？

[lljfl]

接收时应循环接收,你将你的代码贴出来看看

[wzd24]

把你的代码发出来看一下。估计你没有继续接收信息。

[FantasyFreed]

private void load()
{
server = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
IPEndPoint iep = new IPEndPoint(IPAddress.Any, 2020);
server.Bind(iep);
server.Listen(5);
server.BeginAccept(new AsyncCallback(AcceptConn), server);
}

private void AcceptConn(IAsyncResult iar)
{
Socket oldServer = (Socket)iar.AsyncState;
client = oldServer.EndAccept(iar);
conStatus.Text = "连接到:" + client.RemoteEndPoint.ToString();
string stringData = "欢迎来到服务器";
byte[] message1 = Encoding.UTF8.GetBytes(stringData);
client.BeginSend(message1, 0, message1.Length, SocketFlags.None, new AsyncCallback(SendData), client);
}

private void SendData(IAsyncResult iar)
{
Socket client = (Socket)iar.AsyncState;
int sent = client.EndSend(iar);
try
{
client.BeginReceive(data, 0, size, SocketFlags.None, new AsyncCallback(ReceiveData), client);
}
catch (Exception ex)
{
Common.Log.Error(ex.ToString());
}
}

private void ReceiveData(IAsyncResult iar)
{
Socket client = (Socket)iar.AsyncState;
try
{
int recv = client.EndReceive(iar);
if (recv == 18)
{
SPARE1 = BitConverter.ToInt16(data, 0);
HEADERID = Encoding.UTF8.GetString(data, 2, 2);
PLATEID = Encoding.UTF8.GetString(data, 4, 12);
}
}
catch (Exception ex)
{
client.Close();
client.Shutdown(SocketShutdown.Both);
conStatus.Text = "等待客户端...";
server.BeginAccept(new AsyncCallback(AcceptConn), server);
return;
}
}
当客户端发送后，在红字部分打断点，只响应一次。以后都不响应了

[wzd24]

server.BeginAccept(new AsyncCallback(AcceptConn), server);
这里改成:
client.BeginReceive(data, 0, size, SocketFlags.None, new AsyncCallback(ReceiveData), client);

[lljfl]

private void ReceiveData(IAsyncResult iar)
{
Socket client = (Socket)iar.AsyncState;
try
{
int recv = client.EndReceive(iar);
if (recv == 18)
{
SPARE1 = BitConverter.ToInt16(data, 0);
HEADERID = Encoding.UTF8.GetString(data, 2, 2);
PLATEID = Encoding.UTF8.GetString(data, 4, 12);
}
//加上下面几句试试
if(client.Connected)
{
client.BeginReceive(data, 0, size, SocketFlags.None, new AsyncCallback(ReceiveData), client);
}
//

}
catch (Exception ex)
{
client.Close();
client.Shutdown(SocketShutdown.Both);
conStatus.Text = "等待客户端...";
server.BeginAccept(new AsyncCallback(AcceptConn), server);
return;
}
}

[tellyes]

private void AcceptConn(IAsyncResult iar) 
        { 
            Socket oldServer = (Socket)iar.AsyncState; 
            client = oldServer.EndAccept(iar); 
            conStatus.Text = "连接到:" + client.RemoteEndPoint.ToString(); 
            string stringData = "欢迎来到服务器"; 
            byte[] message1 = Encoding.UTF8.GetBytes(stringData); 
            client.BeginSend(message1, 0, message1.Length, SocketFlags.None, new AsyncCallback(SendData), client);
            server.BeginAccept(new AsyncCallback(AcceptConn), server); //加上这句，否则你的服务器只能有一个客户端可以连接上 
        }

另外楼上的方法可以解决你只能收到一条消息的问题

[FantasyFreed]

谢谢大家，lljfl的可以实现。
To:wzd24 牧野（高分亮解） 按照你的方法，当启动时，一直停留在client.BeginReceive(data, 0, size, SocketFlags.None, new AsyncCallback(ReceiveData), client);这。程序不能启动。可能是在一直在接受吧。忘说了，load()是在构造函数里，程序启动时，也就直接启动了。。。