C# NetRemoting实现双向通信

第一个类就是定义一些接口，和一些委托，没有实质性的东西。

第二个类是定义了上一个接口类中的ToClient的事件和方法，作用之后会讲到。

然后就是集成ICommand接口的实质性的数据类

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using ICommand;

namespace NetRemoting
{
  public class RemotingObject : MarshalByRefObject, IRemotingObject
  {
    /// <summary>
    /// 发送事件
    /// </summary>
    public event SendHandler ClientToServer
    {
      add { _send += value; }
      remove { _send -= value; }
    }
    /// <summary>
    /// 接收消息事件
    /// </summary>
    public event ReceiveHandler ServerToClient;
    /// <summary>
    /// 发送事件
    /// </summary>
    public event UserChangedHandler Login
    {
      add { _login += value; }
      remove { _login -= value; }
    }
    /// <summary>
    /// 发送事件
    /// </summary>
    public event UserChangedHandler Exit
    {
      add { _exit += value; }
      remove { _exit -= value; }
    }
    /// <summary>
    /// 加法运算
    /// </summary>
    /// <param name="x1">参数1</param>
    /// <param name="x2">参数2</param>
    /// <returns></returns>
    public string SUM(int x1, int x2)
    {
      return x1 + "+" + x2 + "=" + (x1 + x2);
    }
    /// <summary>
    /// 绑定服务端向客户端发送消息的事件方法
    /// </summary>
    /// <param name="receive">接收事件</param>
    public Delegate[] GetServerEventList()
    {
      return this.ServerToClient.GetInvocationList();
    }
    /// <summary>
    /// 发送消息
    /// </summary>
    /// <param name="info"></param>
    /// <param name="toName"></param>
    public void ToServer(object info, string toName)
    {
      if (_send != null)
        _send(info, toName);
    }
    /// <summary>
    /// 接收消息
    /// </summary>
    /// <param name="info"></param>
    /// <param name="toName"></param>
    public void ToClient(object info, string toName)
    {
      if (_receive != null)
        _receive(info, toName);
    }
    /// <summary>
    /// 登录
    /// </summary>
    /// <param name="name">用户名</param>
    public void ToLogin(string name)
    {
      if (!_nameHash.Contains(name))
      {
        _nameHash.Add(name);
        if (_login != null)
          _login(name);
      }
      else
      { throw new Exception("用户已存在"); }
    }
    /// <summary>
    /// 退出
    /// </summary>
    /// <param name="name">用户名</param>
    public void ToExit(string name)
    {
      if (_nameHash.Contains(name))
      {
        _nameHash.Remove(name);
        if (_exit != null)
          _exit(name);
      }
    }

    private SendHandler _send;
    private ReceiveHandler _receive;
    private UserChangedHandler _login;
    private UserChangedHandler _exit;
    private HashSet<string> _nameHash = new HashSet<string>();
  }
}

								 
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