HttpModule，HttpHandler，HttpHandlerFactory简单使用
<div class="postBody">这三个对象我们在开发Asp.net程序时经常会用到，似乎很熟悉，但有时候又不太确定。本文通过一个简单的例子来直观的比较一下这三个对象的使用。HttpModule：Http模块，可以在页面处理前后、应用程序初始化、出错等时候加入自己的事件处理程序
HttpHandler：Http处理程序，处理页面请求
HttpHandlerFactory：用来创建Http处理程序，创建的同时可以附加自己的事件处理程序
例子很简单，就是在每个页面的头部加入一个版权声明。
一、HttpModule
这个对象我们经常用来进行统一的权限判断、日志等处理。
例子代码：
<div style="border-right: #cccccc 1px solid; padding-right: 5px; border-top: #cccccc 1px solid; padding-left: 4px; font-size: 13px; padding-bottom: 4px; border-left: #cccccc 1px solid; width: 98%; padding-top: 4px; border-bottom: #cccccc 1px solid; background-color: #eeeeee;">http://www.cnblogs.com/Images/OutliningIndicators/None.gifpublicclassMyModule:IHttpModule
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gifhttp://www.cnblogs.com/Images/dot.gif{
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gifpublicvoidInit(HttpApplicationapplication)
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gifhttp://www.cnblogs.com/Images/dot.gif{
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gifapplication.BeginRequest+=newEventHandler(application_BeginRequest);
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif}
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gifvoidapplication_BeginRequest(objectsender,EventArgse)
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gifhttp://www.cnblogs.com/Images/dot.gif{
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif((HttpApplication)sender).Response.Write("Copyright@Gspring<br/>");
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif}
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gifpublicvoidDispose()
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gifhttp://www.cnblogs.com/Images/dot.gif{
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif}
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif}http://www.cnblogs.com/Images/OutliningIndicators/None.gif
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