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16.1 .NET Remoting的含义
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16.1 .NET Remoting的含义
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2006-10-13 14:41:00
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<div style='float:left;width:49%'>·<a href='100165455.htm'>15.6.1 同步的含义</a></div><div style='float:right;width:49%'>·<a href='100165456.htm'>15.6.2 同步问题</a></div><div style='float:left;width:49%'>·<a href='100165457.htm'>15.7 小结</a></div><div style='float:right;width:49%'>·<a href='100165459.htm'>16.1.1 应用程序类型和协议</a></div><div style='float:left;width:49%'>·<a href='100165460.htm'>16.1.2 CLR Object Remoting</a></div><div style='float:right;width:49%'>·<a href='100165461.htm'>16.2 .NET Remoting概述</a></div></div>
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<div id="text"> <link href="css.css" rel="stylesheet" type="text/css" /><p class="MsoNormal"><span style="COLOR: black; FONT-FAMILY: 宋体">本章将讨论</span><span lang="EN-US">.NET Remoting</span><span style="FONT-FAMILY: 宋体">，它可以用来访问另一个应用程序域</span><span lang="EN-US">(</span><span style="FONT-FAMILY: 宋体">例如另一个服务器</span><span lang="EN-US">)</span><span style="FONT-FAMILY: 宋体">中的对象<span style="COLOR: black">。</span></span><span lang="EN-US">.NET Remoting</span><span style="FONT-FAMILY: 宋体">还提供了使用</span><span lang="EN-US">SOAP</span><span style="FONT-FAMILY: 宋体">协议调用的对象。最后，</span><span lang="EN-US">.NET Remoting</span><span style="FONT-FAMILY: 宋体">为客户机和服务器端的</span><span lang="EN-US">.NET</span><span style="FONT-FAMILY: 宋体">应用程序之间的通信提供了一种更为快速的格式。</span></p>
<p class="MsoNormal"><span style="FONT-FAMILY: 宋体">本章将使用</span><span lang="EN-US">HTTP</span><span style="FONT-FAMILY: 宋体">、</span><span lang="EN-US">TCP</span><span style="FONT-FAMILY: 宋体">信道、</span><span lang="EN-US">SOAP</span><span style="FONT-FAMILY: 宋体">和二进制格式符开发</span><span lang="EN-US">.NET Remoting</span><span style="FONT-FAMILY: 宋体">对象、客户和服务器。首先编程定义信道和格式标识符，之后修改应用程序，以使用配置文件，其中只需要几个</span><span lang="EN-US">.NET Remoting</span><span style="FONT-FAMILY: 宋体">方法。本章还编写一些小程序，异步使用</span><span lang="EN-US">.NET Remoting</span><span style="FONT-FAMILY: 宋体">，在客户应用程序中调用事件处理程序。</span></p>
<p class="MsoNormal"><span lang="EN-US">.NET Remoting</span><span style="FONT-FAMILY: 宋体">类位于</span><span lang="EN-US">System.Runtime.Remoting</span><span style="FONT-FAMILY: 宋体">命名空间及其子命名空间中，其中许多类在核心程序集</span><span lang="EN-US">mscorlib</span><span style="FONT-FAMILY: 宋体">中，一些只用于跨网络通信的类在程序集</span><span lang="EN-US">System.Runtime.Remoting</span><span style="FONT-FAMILY: 宋体">中。</span></p>
<p class="MsoNormal"><span style="COLOR: black; FONT-FAMILY: 宋体">本章讨论的内容包括：</span></p>
<p class="1" style="MARGIN-LEFT: 37.55pt; FTEL: -16.1pt"><span lang="EN-US">●<span style="FONT: 7pt "Times New Roman""> </span></span><span lang="EN-US">.NET Remoting</span><span style="FONT-FAMILY: 宋体">概述</span></p>
<p class="1" style="MARGIN-LEFT: 37.55pt; FTEL: -16.1pt"><span lang="EN-US">●<span style="FONT: 7pt "Times New Roman""> </span></span><span style="FONT-FAMILY: 宋体">把具有类似执行要求的对象组合在一起的环境</span></p>
<p class="1" style="MARGIN-LEFT: 37.55pt; FTEL: -16.1pt"><span lang="EN-US">●<span style="FONT: 7pt "Times New Roman""> </span></span><span style="FONT-FAMILY: 宋体">实现一个简单的远程对象、客户和服务器</span></p>
<p class="1" style="MARGIN-LEFT: 37.55pt; FTEL: -16.1pt"><span lang="EN-US">●<span style="FONT: 7pt "Times New Roman""> </span></span><span lang="EN-US">.NET Remoting</span><span style="FONT-FAMILY: 宋体">体系结构</span></p>
<p class="1" style="MARGIN-LEFT: 37.55pt; FTEL: -16.1pt"><span lang="EN-US">●<span style="FONT: 7pt "Times New Roman""> </span></span><span lang="EN-US">.NET Remoting</span><span style="FONT-FAMILY: 宋体">配置文件</span></p>
<p class="1" style="MARGIN-LEFT: 37.55pt; FTEL: -16.1pt"><span lang="EN-US">●<span style="FONT: 7pt "Times New Roman""> </span></span><span style="FONT-FAMILY: 宋体">在</span><span lang="EN-US">ASP.NET</span><span style="FONT-FAMILY: 宋体">中存储</span><span lang="EN-US">.NET Remoting</span><span style="FONT-FAMILY: 宋体">对象</span></p>
<p class="1" style="MARGIN-LEFT: 37.55pt; FTEL: -16.1pt"><span lang="EN-US">●<span style="FONT: 7pt "Times New Roman""> </span></span><span style="FONT-FAMILY: 宋体">使用</span><span lang="EN-US">Soapsuds</span><span style="FONT-FAMILY: 宋体">访问远程对象的元数据</span></p>
<p class="1" style="MARGIN-LEFT: 37.55pt; FTEL: -16.1pt"><span lang="EN-US">●<span style="FONT: 7pt "Times New Roman""> </span></span><span style="FONT-FAMILY: 宋体">异步调用</span><span lang="EN-US">.NET Remoting</span><span style="FONT-FAMILY: 宋体">方法</span></p>
<p class="1" style="MARGIN-LEFT: 37.55pt; FTEL: -16.1pt"><span lang="EN-US">●<span style="FONT: 7pt "Times New Roman""> </span></span><span style="FONT-FAMILY: 宋体">在事件的帮助下调用客户端的方法</span></p>
<p class="1" style="MARGIN-LEFT: 37.55pt; FTEL: -16.1pt"><span lang="EN-US">●<span style="FONT: 7pt "Times New Roman""> </span></span><span style="FONT-FAMILY: 宋体">使用</span><span lang="EN-US">CallContext</span><span style="FONT-FAMILY: 宋体">自动把数据传送给服务器</span></p>
<p class="MsoNormal"><span style="COLOR: black; FONT-FAMILY: 宋体">首先阐述</span><span lang="EN-US" style="COLOR: black">.NET Remoting</span><span style="COLOR: black; FONT-FAMILY: 宋体">的含义。</span></p>
<p class="a3" style="MARGIN-TOP: 8.15pt; FTEL: 21.45pt"><span style="FONT-FAMILY: 黑体">提示：</span></p>
<p class="a1" style="MARGIN-TOP: 0cm; MARGIN-LEFT: 10.7pt; MARGIN-RIGHT: 0cm; FTEL: 10.7pt"><span style="COLOR: black; FONT-FAMILY: 楷体_GB2312">如果使用</span><span lang="EN-US" style="COLOR: black">Windows XP</span><span style="COLOR: black; FONT-FAMILY: 楷体_GB2312">启动客户和服务器应用程序，就必须关闭本地</span><span lang="EN-US" style="COLOR: black">Windows XP</span><span style="COLOR: black; FONT-FAMILY: 楷体_GB2312">防火墙。其方法是在控制面板上选择“网络连接”项目，打开该项目，在局域网、拨号连接或其他网络类型的属性面板选择“高级”选项，关闭防火墙。</span><span lang="EN-US"> </span></p>
<h3 style="MARGIN-TOP: 11.4pt; MARGIN-LEFT: 0cm; MARGIN-RIGHT: 0cm; FTEL: 11.4pt"><a ftel="_Toc507815542"><span lang="EN-US">16.1 .NET Remoting</span></a><span style="FONT-FAMILY: 楷体_GB2312">的含义</span></h3>
<p class="MsoNormal"><span style="FONT-FAMILY: 宋体">许多应用程序都不是运行在一个系统上的独立应用程序，但它们都使用网络通信技术调用远程服务器上的方法。此时就要使用</span><span lang="EN-US">.NET Remoting</span><span style="FONT-FAMILY: 宋体">了。</span></p>
<p class="MsoNormal"><span style="FONT-FAMILY: 宋体">对于客户和服务器应用程序之间的通信，可以使用不同的技术。可以使用套接字编写应用程序，或使用</span><span lang="EN-US">System.Net</span><span style="FONT-FAMILY: 宋体">命名空间中的一些帮助类，以易于处理协议、</span><span lang="EN-US">IP</span><span style="FONT-FAMILY: 宋体">地址和端口号</span><span lang="EN-US">(</span><span style="FONT-FAMILY: 宋体">详见第</span><span lang="EN-US">31</span><span style="FONT-FAMILY: 宋体">章</span><span lang="EN-US">)</span><span style="FONT-FAMILY: 宋体">。使用这个技术总是必须通过网络发送数据。所发送的数据可以是自己的定制协议，由服务器解释数据包，这样服务器就知道应调用什么方法。我们不仅需要处理发送的数据，还需要自己创建线程。</span></p>
<p class="MsoNormal"><span style="FONT-FAMILY: 宋体">我们可以在服务器应用程序上通过网络调用方法，而不是发送数据。这就是</span><span lang="EN-US">XML Web</span><span style="FONT-FAMILY: 宋体">服务和</span><span lang="EN-US">.NET Remoting</span><span style="FONT-FAMILY: 宋体">的目标。</span><span lang="EN-US">XML Web</span><span style="FONT-FAMILY: 宋体">服务使用</span><span lang="EN-US">SOAP</span><span style="FONT-FAMILY: 宋体">协议确保不同平台之间的交互操作性，而</span><span lang="EN-US">.NET Remoting</span><span style="FONT-FAMILY: 宋体">有不同的目标。</span></p>
<p class="MsoNormal"><span lang="EN-US">.NET Remoting</span><span style="FONT-FAMILY: 宋体">的目标可以用应用程序类型和所提供的协议来描述，还可以通过</span><span lang="EN-US" style="COLOR: black">CLR Object Remoting</span><span style="COLOR: black; FONT-FAMILY: 宋体">来描述。</span></p></div>
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