【整理】delegate+RemotingServices 委托+远程调用的一个实例

一、公共DLL库

namespace RemoteSample
{
    //客户端获取到服务端的对象实际是一个对象的引用，因此必须继承：MarshalByRefObject
    public class HelloServer : MarshalByRefObject
    {
        public delegate string MessageReceivedEvent(object sender, MessageReceivedEventArgs e);
        public event MessageReceivedEvent MessageReceived;

        public HelloServer()
        {
            Console.WriteLine("HelloServer   activated");
        }

        public String HelloMethod(String name)
        {
            return MessageReceived(this,new MessageReceivedEventArgs(name));
        }

        //说明1:在Remoting中的远程对象中，如果还要调用或传递某个对象，例如类，或者结构，则该类或结构则必须实现串行化Attribute[SerializableAttribute]：
        //说明2:将该远程对象以类库的方式编译成Dll。这个Dll将分别放在服务器端和客户端，以添加引用
        //说明3:在Remoting中能够传递的远程对象可以是各种类型，包括复杂的DataSet对象，只要它能够被序列化

    }

    public class MessageReceivedEventArgs : EventArgs
    {
        public string str = "";

        public MessageReceivedEventArgs(string str1)
        {
            this.str = str1;
        }
    }
}

二、Server

【IP：192.168.142.1】

using System.Runtime.Remoting;
using System.Runtime.Remoting.Channels;
using System.Runtime.Remoting.Channels.Tcp;

namespace RemoteSample
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private ObjRef mi_Service = null;

        private void Form1_Load(object sender, EventArgs e)
        {
            TcpChannel chan = new TcpChannel(8085);
            ChannelServices.RegisterChannel(chan, false);            
            string sshan = chan.ChannelName;
            listBox1.Items.Add(sshan);
            //注册远程对象,即激活.
            //RemotingConfiguration.RegisterWellKnownServiceType(typeof(RemoteSample.HelloServer), "SayHello", WellKnownObjectMode.SingleCall);

            HelloServer mi_Transfer = new HelloServer();
            mi_Service = RemotingServices.Marshal(mi_Transfer, "SECSRemote");

            mi_Transfer.MessageReceived += new HelloServer.MessageReceivedEvent(OnNewMessage);
        }

        private string OnNewMessage(object sender,MessageReceivedEventArgs e)
        {
            return "Parameter : " + e.str ;
        }
    }
}

三、Client

using System.Runtime.Remoting.Channels.Tcp;
using System.Runtime.Remoting.Channels;

namespace RemoteSample
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            TcpChannel chan = new TcpChannel();
            ChannelServices.RegisterChannel(chan);
        }

        private void button1_Click(object sender, EventArgs e)
        {            
            HelloServer obj = (HelloServer)Activator.GetObject(typeof(HelloServer), "tcp://192.168.142.1:8085/SECSRemote");
            if (obj == null)
                MessageBox.Show("Could   not   locate   server");
            else
                MessageBox.Show(obj.HelloMethod("Caveman"));
        }
    }
}

运行Server后，再打开Client，点击按钮，将弹出消息：Parameter:Caveman