参数减去构造函数错误 [英] parameter less constructor error

问题描述

我正在尝试让客户端订阅服务器上发生的事件.

I'm trying to make my client subscribe to events that happen on my server.

我有一个看起来像这样的界面:

I have an interface that looks like this:

public delegate void RemoteEventHandler(object sender, ClientEventArgs args);


[Serializable]
public class ClientEventArgs : EventArgs
{
    public ClientEventArgs()
    { }

    public ClientEventArgs(Client _client)
    {
        MyClient = _client;
    }
    public Client MyClient { get; set; }
}

public interface IMonitor
{
    event RemoteEventHandler RemoteEvent;
}

我的服务器类如下:

public class ConnectionManager : MarshalByRefObject, IMonitor
{
    public event RemoteEventHandler RemoteEvent;

    // call the below code when th event should fire.
     if (RemoteEvent != null)
            RemoteEvent(this, new ClientEventArgs(e.MyClient));
}

然后要在服务器上设置我的频道，请执行以下操作:

Then To set my channels up on the server I do this:

BinaryServerFormatterSinkProvider provider = new BinaryServerFormatterSinkProvider();
provider.TypeFilterLevel = TypeFilterLevel.Full;
IDictionary props = new Hashtable();
props["port"] = 5001;
TcpChannel channel = new TcpChannel(props, null, provider);
ChannelServices.RegisterChannel(channel, false);
RemotingConfiguration.RegisterWellKnownServiceType(
typeof(ConnectionManager),
ConnectionManager",
WellKnownObjectMode.Singleton);

然后在客户端上设置频道并订阅活动:

And On the client to set the channels up and subscribe to the event:

TcpChannel channel = new TcpChannel();
        ChannelServices.RegisterChannel(channel, false);
        _monitorObject = (IMonitor)Activator.GetObject(
            typeof(IMonitor),
            "tcp://localhost:5001/ConnectionManager");

_monitorObject.RemoteEvent += _monitorObject_RemoteEvent;

任何人都可以解释这是怎么回事吗?

Can anyone explain where this is going wrong please?

例外:

未处理System.MissingMethodException HResult = -2146233069消息=未为此对象定义无参数构造函数.
来源= mscorlib

System.MissingMethodException was unhandled HResult=-2146233069 Message=No parameterless constructor defined for this object.
Source=mscorlib

推荐答案

要回答您的最后一个问题:使用Serializable时，您需要一个没有参数的构造函数.因此，这肯定会失败:

To answer your last question: when using Serializable you need a constructor without parameters. So this one would definitely fail:

[Serializable]
public class ClientEventArgs : EventArgs
{
    public ClientEventArgs(Client _client)
    {
        MyClient = _client;
    }
    public Client MyClient { get; set; }
}

您需要添加一个无参数的构造函数:

You need to add a parameterless constructor:

[Serializable]
public class ClientEventArgs : EventArgs
{
    public ClientEventArgs()
    { }

    public ClientEventArgs(Client _client)
    {
        MyClient = _client;
    }
    public Client MyClient { get; set; }
}

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