我目前正在开发一个应用程序服务器。我想使用 AcceptAsync 方法。我收到错误消息“对象引用未设置为对象的实例。”调用 ReceiveAsync 方法时。如果有人提出这个问题并得到解决方案?
public class AppServer
{
public void Start()
{
Socket serverSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
serverSocket.Bind(new IPEndPoint(IPAddress.Any, 12345));
serverSocket.Listen(100);
SocketAsyncEventArgs e = new SocketAsyncEventArgs();
e.Completed += new EventHandler<SocketAsyncEventArgs>(e_Completed);
bool raiseEvent = serverSocket.AcceptAsync(e);
if (!raiseEvent)
AcceptCallback(e);
}
void e_Completed(object sender, SocketAsyncEventArgs e)
{
AcceptCallback(e);
}
private void AcceptCallback(SocketAsyncEventArgs e)
{
SocketAsyncEventArgs readEventArgs = new SocketAsyncEventArgs();
readEventArgs.Completed += new EventHandler<SocketAsyncEventArgs>(readEventArgs_Completed);
Socket clientSocket = e.AcceptSocket;
bool raiseEvent = clientSocket.ReceiveAsync(readEventArgs); // <-- Error goes here
if (!raiseEvent)
ReceiveCallback(readEventArgs);
}
void readEventArgs_Completed(object sender, SocketAsyncEventArgs e)
{
ReceiveCallback(e);
}
private void ReceiveCallback(SocketAsyncEventArgs e)
{
}
}
最佳答案
我遇到了同样的问题,我设法解决了。 您需要为 SocketAsyncEventArgs 对象提供数据缓冲区(字节数组)以存储在调用 ReceiveAsync(e) 之前收到的数据。
void e_Completed(object sender, SocketAsyncEventArgs e)
{
byte[] buffer = new byte[1024];
e.SetBuffer(buffer, 0, buffer.Length);
AcceptCallback(e);
}
关于C# ReceiveAsync 错误,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/6315256/