HOW TO：建立用戶端啟動型別的執行個體

本文說明兩種產生用戶端啟動物件的方式。第一個方法使用 CreateInstance，第二個方法則使用 new 運算子。

使用 Activator.CreateInstance 建立執行個體

1. 建立並註冊 TcpChannel

   Dim channel As TcpChannel = New TcpChannel()
    ChannelServices.RegisterChannel(channel, False)
   TcpChannel channel = new TcpChannel();
   ChannelServices.RegisterChannel(channel, false);
   

2. 註冊用戶端啟動物件

   RemotingConfiguration.RegisterActivatedClientType( _
       GetType(MyRemoteObject), _
       "tcp://localhost:1234/MyServer")
   RemotingConfiguration.RegisterActivatedClientType(
       typeof(MyRemoteObject),
       "tcp://localhost:1234/MyServer");
   

3. 呼叫 CreateInstance

   Dim url() As Object = {New UrlAttribute("tcp://localhost:1234/Server")}
   Dim obj As MyRemoteObject = CType(Activator.CreateInstance( _
       GetType(MyRemoteObject), _
       Nothing, _
       url), MyRemoteObject)
   
   object[] url = { new UrlAttribute("tcp://localhost:1234/Server") };
   MyRemoteObject obj = (MyRemoteObject)Activator.CreateInstance(
       typeof(MyRemoteObject),
       null,
       url);
   

使用 New 運算子建立執行個體

1. 建立並註冊通道

   Dim channel As TcpChannel = New TcpChannel()
    ChannelServices.RegisterChannel(channel, False)
   TcpChannel channel = new TcpChannel();
   ChannelServices.RegisterChannel(channel, false);
   

2. 註冊用戶端啟動物件

   RemotingConfiguration.RegisterActivatedClientType( _
       GetType(MyRemoteObject), _
       "tcp://localhost:1234/MyServer")
   RemotingConfiguration.RegisterActivatedClientType(
       typeof(MyRemoteObject),
       "tcp://localhost:1234/MyServer");
   

3. 呼叫 new 運算子

   Dim obj As MyRemoteObject = New MyRemoteObject(123)
   MyRemoteObject obj = new MyRemoteObject(123);
   

範例

下列程式碼範例示範兩種用來建立用戶端啟動執行個體的方法：

Imports System
Imports System.Runtime.Remoting
Imports System.Runtime.Remoting.Channels
Imports System.Runtime.Remoting.Channels.Tcp
Imports System.Runtime.Remoting.Activation
Imports Server

Module Client

    Sub Main()
        ' Create and register a channel
        Dim channel As TcpChannel = New TcpChannel()
        ChannelServices.RegisterChannel(channel, False)

  ' Register the client activated object
        RemotingConfiguration.RegisterActivatedClientType( _
            GetType(MyRemoteObject), _
            "tcp://localhost:1234/MyServer")

  ' Call Activator.CreateInstance

    Dim obj As MyRemoteObject = CType(Activator.CreateInstance( _
       GetType(MyRemoteObject), _
       Nothing, _

           url), MyRemoteObject)
   
        ' OR call operator new
        Dim obj As MyRemoteObject = New MyRemoteObject(123)

        Console.WriteLine("Client.Main(): GetValue returned: {0}", obj.GetValue())
        Console.WriteLine("Client.Main(): Calling SetValue(10)")
        obj.SetValue(10)
        Console.WriteLine("Client.Main(): GetValue returned: {0}", obj.GetValue())
    End Sub

End Module

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

namespace Client
{
    class Client
    {
        static void Main(string[] args)
        {
// Create and register channel
            TcpChannel channel = new TcpChannel();
            ChannelServices.RegisterChannel(channel, false);

// Register client activated object
            RemotingConfiguration.RegisterActivatedClientType(
                typeof(MyRemoteObject),
                "tcp://localhost:1234/MyServer");

// Call Activator.CreateInstance

object[] url = { new  UrlAttribute("tcp://localhost:1234/Server") };
         MyRemoteObject obj = (MyRemoteObject)Activator.CreateInstance(
            typeof(MyRemoteObject),
            null,

               url);
      // OR call operator new
            MyRemoteObject obj = new MyRemoteObject(123);

            Console.WriteLine("Client.Main(): GetValue returned: " + obj.GetValue());
            Console.WriteLine("Client.Main(): Calling SetValue(10)");
            obj.SetValue(10);
            Console.WriteLine("Client.Main(): GetValue returned: " + obj.GetValue());
        }
    }
}

編譯程式碼

這個範例需要：

• System 和 System.Runtime.Remoting 命名空間的參考，以及可實作 MyRemoteObject 的命名空間。

請參閱

概念

遠端物件的啟動過程
遠端應用程式的組態
伺服器啟動過程
存留期租用期
用戶端啟動過程

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