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<p class="a6" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> System.Console.ReadLine();</span></p>
<p class="a6" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> return;</span></p>
<p class="a6" style="MARGIN-TOP: 0cm; MARGIN-LEFT: 21.45pt; MARGIN-RIGHT: 0cm; FTEL: 18.45pt"><span lang="EN-US">}</span></p>
<p class="MsoNormal"><span style="COLOR: black; FONT-FAMILY: 宋体">这两个函数显示了知名对象和</span><span lang="EN-US" style="COLOR: black">Client-activated</span><span style="COLOR: black; FONT-FAMILY: 宋体">对象的配置信息：</span></p>
<p class="2" style="MARGIN-TOP: 8.15pt; MARGIN-LEFT: 21.45pt; MARGIN-RIGHT: 0cm; FTEL: 18.45pt"><span lang="EN-US">public static void ShowWellKnownServiceTypes()</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.5pt; FTEL: 18.45pt"><span lang="EN-US">{</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.5pt; FTEL: 18.45pt"><span lang="EN-US"> WellKnownServiceTypeEntry[] entries =</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.5pt; FTEL: 18.45pt"><span lang="EN-US"> RemotingConfiguration.GetRegisteredWellKnownServiceTypes();</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.5pt; FTEL: 18.45pt"><span lang="EN-US"> foreach (WellKnownServiceTypeEntry entry in entries)</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.5pt; FTEL: 18.45pt"><span lang="EN-US"> {</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.5pt; FTEL: 18.45pt"><span lang="EN-US"> Console.WriteLine("Assembly: " + entry.AssemblyName);</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.5pt; FTEL: 18.45pt"><span lang="EN-US"> Console.WriteLine("Mode: " + entry.Mode);</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.5pt; FTEL: 18.45pt"><span lang="EN-US"> Console.WriteLine("URI: " + entry.ObjectUri);</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.5pt; FTEL: 18.45pt"><span lang="EN-US"> Console.WriteLine("Type: " + entry.TypeName);</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.5pt; FTEL: 18.45pt"><span lang="EN-US"> }</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.5pt; FTEL: 18.45pt"><span lang="EN-US">}</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.5pt; FTEL: 18.45pt"><span lang="EN-US">public static void ShowActivatedServiceTypes()</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.5pt; FTEL: 18.45pt"><span lang="EN-US">{</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.5pt; FTEL: 18.45pt"><span lang="EN-US"> ActivatedServiceTypeEntry[] entries =</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.5pt; FTEL: 18.45pt"><span lang="EN-US"> RemotingConfiguration.GetRegisteredActivatedServiceTypes();</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.5pt; FTEL: 18.45pt"><span lang="EN-US"> foreach (ActivatedServiceTypeEntry entry in entries)</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.5pt; FTEL: 18.45pt"><span lang="EN-US"> {</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.5pt; FTEL: 18.45pt"><span lang="EN-US"> Console.WriteLine("Assembly: " + entry.AssemblyName);</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.5pt; FTEL: 18.45pt"><span lang="EN-US"> Console.WriteLine("Type: " + entry.TypeName);</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> }</span></p>
<p class="2" style="MARGIN-TOP: 0cm; MARGIN-LEFT: 21.45pt; MARGIN-RIGHT: 0cm; FTEL: 18.45pt"><span lang="EN-US">}</span></p>
<h4 style="FTEL: 21.45pt"><span lang="EN-US">7. </span><span style="FONT-FAMILY: 黑体">使用配置文件的客户端代码</span></h4>
<p class="MsoNormal"><span style="FONT-FAMILY: 宋体">在客户端代码中，只需使用配置文件</span><span lang="EN-US">client.exe.config</span><span style="FONT-FAMILY: 宋体">配置远程服务，之后，不论处理的是服务器激活的远程对象还是客户激活的远程对象，都可以使用运算符</span><span lang="EN-US">new</span><span style="FONT-FAMILY: 宋体">创建远程类</span><span lang="EN-US">Hello</span><span style="FONT-FAMILY: 宋体">的新实例。但是有一点不同：对于客户激活的对象而言，非默认的构造函数和运算符</span><span lang="EN-US">new</span><span style="FONT-FAMILY: 宋体">可以一起使用。但服务器激活的对象不行，原因是</span><span lang="EN-US">SingleCall</span><span style="FONT-FAMILY: 宋体">对象可以没有状态，因为每次调用之后它们都会删除，并且</span><span lang="EN-US">Singleton</span><span style="FONT-FAMILY: 宋体">对象只创建一次。调用非默认的构造函数只对客户激活的对象有效，因为运算符</span><span lang="EN-US">new</span><span style="FONT-FAMILY: 宋体">只能针对这种对象调用远程对象中的构造函数。</span></p>
<p class="MsoNormal"><span style="COLOR: black; FONT-FAMILY: 宋体">在文件</span><span lang="EN-US">HelloClient.cs </span><span style="FONT-FAMILY: 宋体">的</span><span lang="EN-US" style="COLOR: black">Main()</span><span style="COLOR: black; FONT-FAMILY: 宋体">方法中，可以改变远程服务代码，使用配置文件和</span><span lang="EN-US">RemotingConfiguration.Configure()</span><span style="FONT-FAMILY: 宋体">，用</span><span lang="EN-US">new</span><span style="COLOR: black; FONT-FAMILY: 宋体">运算符</span><span style="FONT-FAMILY: 宋体">创建远程对象：</span></p>
<p class="2" style="MARGIN-TOP: 8.15pt; MARGIN-LEFT: 21.45pt; MARGIN-RIGHT: 0cm; FTEL: 18.45pt"><span lang="EN-US">RemotingConfiguration.Configure("HelloClient.exe.config");</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US">Hello obj = new Hello();</span></p>
<p class="2" style="BACKGROUND: none transparent scroll repeat 0% 0%; MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US">if (obj == null)</span></p>
<p class="2" style="BACKGROUND: none transparent scroll repeat 0% 0%; MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US">{</span></p>
<p class="2" style="BACKGROUND: none transparent scroll repeat 0% 0%; MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> Console.WriteLine("could not locate server");</span></p>
<p class="2" style="BACKGROUND: none transparent scroll repeat 0% 0%; MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> return;</span></p>
<p class="2" style="BACKGROUND: none transparent scroll repeat 0% 0%; MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US">}</span></p>
<p class="2" style="BACKGROUND: none transparent scroll repeat 0% 0%; MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US">for (int i=0; i < 5; i++)</span></p>
<p class="2" style="BACKGROUND: none transparent scroll repeat 0% 0%; MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US">{</span></p>
<p class="2" style="BACKGROUND: none transparent scroll repeat 0% 0%; MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> Console.WriteLine(obj.Greeting("Christian"));</span></p>
<p class="2" style="MARGIN-TOP: 0cm; BACKGROUND: none transparent scroll repeat 0% 0%; MARGIN-LEFT: 21.45pt; MARGIN-RIGHT: 0cm; FTEL: 18.45pt"><span lang="EN-US">}</span></p>
<h4 style="FTEL: 21.45pt"><span lang="EN-US">8. </span><span style="FONT-FAMILY: 黑体">客户信道的延迟加载</span></h4>
<p class="MsoNormal"><span style="COLOR: black; FONT-FAMILY: 宋体">如果客户没有配置信道，使用配置文件</span><span lang="EN-US">machine.config</span><span style="FONT-FAMILY: 宋体">，就可以配置能自动使用的两条信道：</span></p>
<p class="2" style="MARGIN-TOP: 8.15pt; MARGIN-LEFT: 21.45pt; MARGIN-RIGHT: 0cm; FTEL: 18.45pt"><span lang="EN-US"> <system.runtime.remoting></span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> <application></span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> <channels></span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> <channel ref="http client" displayFTEL="http client (delay loaded)" </span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> delayLoadAsClientChannel="true"/></span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> <channel ref="tcp client" displayFTEL="tcp client (delay loaded)" </span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> delayLoadAsClientChannel="true"/> </span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> </channels></span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> </application></span></p>
<p class="2" style="MARGIN-TOP: 0cm; MARGIN-LEFT: 21.45pt; MARGIN-RIGHT: 0cm; FTEL: 18.45pt"><span lang="EN-US"> </system.runtime.remoting> </span></p>
<p class="MsoNormal"><span lang="EN-US">XML</span><span style="FONT-FAMILY: 宋体">特性</span><span lang="EN-US">delayLoadAsClientChannel</span><span style="FONT-FAMILY: 宋体">的值为</span><span lang="EN-US">true</span><span style="FONT-FAMILY: 宋体">时，将定义应在没有配置信道的客户机上使用的信道。运行库会试着使用延迟加载的信道连接服务器，所以不需要在客户机配置文件中配置信道，前面使用的知名对象的客户机配置文件可以变得非常简单：</span></p>
<p class="2" style="MARGIN-TOP: 8.15pt; MARGIN-LEFT: 21.45pt; MARGIN-RIGHT: 0cm; FTEL: 18.45pt"><span lang="EN-US"><configuration></span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> <system.runtime.remoting></span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> <application FTEL="Client"></span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> <client url="tcp:/localhost:6791/Hello"></span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> <wellknown type = "Wrox.ProCSharp.Remoting.Hello, RemoteHello" </span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> url="tcp://localhost:6791/Hello/Hi" /></span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> </client></span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> </application></span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> </system.runtime.remoting></span></p>
<p class="2" style="MARGIN-TOP: 0cm; MARGIN-LEFT: 21.45pt; MARGIN-RIGHT: 0cm; FTEL: 18.45pt"><span lang="EN-US"></configuration></span></p>
<h4 style="FTEL: 21.45pt"><span lang="EN-US">9. </span><span style="FONT-FAMILY: 黑体">配置文件中的生存期服务</span></h4>
<p class="MsoNormal"><span style="FONT-FAMILY: 宋体">远程服务器的租约配置也可以使用应用程序配置文件来完成。元素</span><span lang="EN-US"><lifetime></span><span style="FONT-FAMILY: 宋体">有</span><span lang="EN-US">leaseTime</span><span style="FONT-FAMILY: 宋体">、</span><span lang="EN-US">sponsorshipTimeOut</span><span style="FONT-FAMILY: 宋体">、</span><span lang="EN-US">renewOnCallTime</span><span style="FONT-FAMILY: 宋体">和</span><span lang="EN-US"> pollTime</span><span style="FONT-FAMILY: 宋体">特性。在下面的示例中可以看到这些特性：</span></p>
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