Question

我正在尝试将IAsyncResult.AsyncState强制转换为类StateObject。但由于AsyncState的类型为Socket，因此它会发出强制转换错误。我需要从结果中获取字节数据。我刚刚开始了一个服务器项目，我对此并不熟悉。

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();
    }

这是OnReceiveHandlerClass

private void Receive(IAsyncResult result)
    {

      StateObject ss = (StateObject)result.AsyncState;
      ......
      }

提前致谢..

Answer 1

我收到错误是因为我在BeginReceive方法中发送了一个不同的对象，以防发送StateObject

Correct method:
Socket.BeginReceive(StateObject.DataBuffer, 0, (int)StateObject.DataLength, 
                      SocketFlags.None, new AsyncCallback(this.Receive),StateObject);

最后一个参数应该是StateObject类型，我发送一个对象，因为我不知道该为该参数发送什么。

无法转换IAsyncResult.AsyncState

1 个答案: