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29.1.9 松散藕合的事件
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29.1.9 松散藕合的事件
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2006-10-13 14:41:00
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<div style='float:left;width:49%'>·<a href='100165745.htm'>29.1.6 对象池</a></div><div style='float:right;width:49%'>·<a href='100165746.htm'>29.1.7 基于角色的安全性</a></div><div style='float:left;width:49%'>·<a href='100165747.htm'>29.1.8 排队的组件</a></div><div style='float:right;width:49%'>·<a href='100165749.htm'>29.2 创建简单的COM+应用程序</a></div><div style='float:left;width:49%'>·<a href='100165750.htm'>29.2.1 类ServicedComponent</a></div><div style='float:right;width:49%'>·<a href='100165751.htm'>29.2.2 应用程序属性</a></div></div>
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<div id="text"> <link href="css.css" rel="stylesheet" type="text/css" /><h3 style='margin-top:8.15pt;margin-right:0cm;FTEL:8.15pt;margin-left:
0cm'><span lang=EN-US>29.1.9 </span><span style='font-family:黑体'>松散藕合的事件</span></h3>
<p class=MsoNormal><span style='font-family:宋体'>第</span><span lang=EN-US>16</span><span
style='font-family:宋体'>章讨论了如何在</span><span lang=EN-US>.NET Remoting</span><span
style='font-family:宋体'>中使用事件。第</span><span lang=EN-US>18</span><span
style='font-family:宋体'>章讨论了如何在</span><span lang=EN-US>COM</span><span
style='font-family:宋体'>环境中使用事件。通过这两个事件机制，客户和服务器之间就会建立一个牢固的连接。这与松散藕合的事件</span><span
lang=EN-US>(LCE)</span><span style='font-family:宋体'>不同。在</span><span
lang=EN-US>LCE</span><span style='font-family:宋体'>中，</span><span lang=EN-US>COM+</span><span
style='font-family:宋体'>功能会插入客户和服务器之间</span><span lang=EN-US>(</span><span
style='font-family:宋体'>如图</span><span lang=EN-US>29-2</span><span
style='font-family:宋体'>所示</span><span lang=EN-US>)</span><span
style='font-family:宋体'>。发布者会通过定义一个事件类，用</span><span lang=EN-US>COM+</span><span
style='font-family:宋体'>来注册它提供的事件。发布者不是把事件直接发送给客户，而是把事件发送给用</span><span
lang=EN-US>LCE</span><span style='font-family:宋体'>服务注册的事件类。</span><span
lang=EN-US>LCE</span><span style='font-family:宋体'>服务会把事件转发给订阅者，订阅者是为事件注册了订阅的客户应用程序。</span></p>
<p align=center><span lang=EN-US><img width=344 height=160
src="29/image002.gif"></span></p>
<p align=center style='FTEL:8.15pt'><span style='font-family:宋体'>图</span><span
lang=EN-US> 29-2</span></p>
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<div style='float:left;width:49%'>·<a href='100165745.htm'>29.1.6 对象池</a></div><div style='float:right;width:49%'>·<a href='100165746.htm'>29.1.7 基于角色的安全性</a></div><div style='float:left;width:49%'>·<a href='100165747.htm'>29.1.8 排队的组件</a></div><div style='float:right;width:49%'>·<a href='100165749.htm'>29.2 创建简单的COM+应用程序</a></div><div style='float:left;width:49%'>·<a href='100165750.htm'>29.2.1 类ServicedComponent</a></div><div style='float:right;width:49%'>·<a href='100165751.htm'>29.2.2 应用程序属性</a></div></div>
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