这个小项目背后的想法是开发一个聊天应用程序,不同之处在于我想发送对象而不只是普通字符串。到目前为止,这就是我所拥有的。

如果我在构造函数上反序列化,它就可以正常工作(UserDTO现在仅具有2个字符串字段),但是,我计划让多个客户端在他们希望的任何时候将数据发送到服务器。即使在阅读了MS的文档之后,我仍然难以理解它的工作原理以及如何解决该错误(像这样,它在Deseralize行上给出了“引发类型为'System.OutOfMemoryException'的异常。”),并且喜欢你们的一些想法。

请注意尝试编译此文件的人员:Binaryformatter的操作方法如下:假设UserDTO具有字符串名称,字符串电子邮件的属性。
将此类应用于客户端和服务器时,必须使用类库对其进行构建,并将其引用添加到两个项目中,因为不知何故,binaryformater表示即使在两个项目中都创建相同的类,反序列化也无法映射该类。宾语。我将在下面留下我正在使用的客户端示例。

服务器:

class Program {
const int serverPort = 60967;
static List<UserConnection> clientList = new List<UserConnection>();
static TcpListener listener;
static Thread listenerThread;


static void Main(string[] args) {
        listenerThread = new Thread(new ThreadStart(DoListen));
        listenerThread.Start();
        Console.WriteLine("Server Started");
        //while (true) {
            string a = Console.ReadLine()
        //}
   }

static void DoListen() {
        try {
            listener = new TcpListener(System.Net.IPAddress.Any, serverPort);
            listener.Start();
            Console.WriteLine("Listening [...]");
            do {
                UserConnection client = new UserConnection(listener.AcceptTcpClient());
                //clientList.Add(client);
                Console.WriteLine("New connection found");
            } while (true);
        }
        catch (Exception ex) {
            Console.WriteLine(ex.ToString());
        }
    }
}



public class UserConnection {
private TcpClient clientInfo;
private byte[] readBuffer = new byte[2000];
const int READ_BUFFER_SIZE = 2000;

public UserConnection(TcpClient client) {
    clientInfo = client;
    clientInfo.GetStream().BeginRead(readBuffer, 0, READ_BUFFER_SIZE, new AsyncCallback(StreamReceiver), null);
}

private void StreamReceiver(IAsyncResult ar) {
    try
    {
        if (client.GetStream().CanRead) {
        lock (clientInfo.GetStream()) {
            var strm = clientInfo.GetStream();
            int BytesRead = clientInfo.GetStream().EndRead(ar);
            BinaryFormatter formatter = new BinaryFormatter();
            var mydat = (UserDTO)formatter.Deserialize(strm);
        }
        lock (clientInfo.GetStream()) {
            clientInfo.GetStream().BeginRead(readBuffer, 0, READ_BUFFER_SIZE, new AsyncCallback(StreamReceiver), null);
        }
    }

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


客户:

class Program {
    static void Main(string[] args) {
            ConnectResult("localhost", 60967);
            Console.ReadLine();
        }
    }

    static string ConnectResult(string ip, int port) {
        try {
            TcpClient client = new TcpClient(ip, port);
            AttemptLogin(client);
            return "Connection Succeeded";
        }
        catch (Exception ex) {
            return "Server is not active.  Please start server and try again.      " + ex.ToString();
        }
    }

    static void AttemptLogin(TcpClient client) {
        UserDTO obj = new UserDTO("email", "username");
        IFormatter formatter = new BinaryFormatter();
        var stream = client.GetStream();
        formatter.Serialize(stream, obj);
        Console.WriteLine("Sent Object");
    }
}

最佳答案

而不是执行所有BeginRead()调用,请尝试仅获取流并将其传递到BinaryFormatter.DeSerialize()方法中。

public UserConnection(TcpClient client) {
    clientInfo = client;
    //clientInfo.GetStream().BeginRead(readBuffer, 0, READ_BUFFER_SIZE, new AsyncCallback(StreamReceiver), null);
    var strm = clientInfo.GetStream();
    BinaryFormatter formatter = new BinaryFormatter();
    var mydat = (UserDTO)formatter.Deserialize(strm);
}


我的猜测是,您的信息流位置已经移动了,即使不是最后。当您将其传递到Deserialize()时,不再有任何数据可供读取。实际上,如果DTO不能容纳超过2000个字节,则byte[] readBuffer可能具有所需的所有数据。如果是这种情况,那么您应该能够使用readBuffer中的字节反序列化。

09-10 06:53