MSDN上有一篇很详细的文章

http://msdn.microsoft.com/zh-cn/library/ms972974.aspx

但是我用的是另一个:UrlRewritingNet控件

它的使用方法很简单:

1.将UrlRewritingNet.UrlRewriter.dll拷到bin目录下。 下载

2.在web.config里进行相关的配置
<?xml version="1.0"?>
<configuration>
    
<configSections>
        
<section name="urlrewritingnet" requirePermission ="false" type="UrlRewritingNet.Configuration.UrlRewriteSection, UrlRewritingNet.UrlRewriter"/>
    
</configSections>

    
<urlrewritingnet rewriteOnlyVirtualUrls="true" contextItemsPrefix="QueryString" defaultPage = "default.aspx" defaultProvider="RegEx" xmlns="http://www.urlrewriting.net/schemas/config/2006/07" >
        
<rewrites>
            
<add name="Rewrite"   virtualUrl="^~/(.*)/Detail(.*).aspx"
                  rewriteUrlParameter
="ExcludeFromClientQueryString"
                  destinationUrl
="~/Default.aspx?type=$1&id=$2"
                  ignoreCase
="true" />
        
</rewrites>
    
</urlrewritingnet>

    
<appSettings/>
    
<connectionStrings/>
    
<system.web>
        
<compilation debug="true"/>
        
<authentication mode="Windows"/>
        
<httpModules>
            
<add name="UrlRewriteModule"
                  type
="UrlRewritingNet.Web.UrlRewriteModule, UrlRewritingNet.UrlRewriter" />
        
</httpModules>
    
</system.web>
</configuration>
大功告成!关键的2步都在这了,至于涉及的正则表达式等其它方面我也不懂,靠Google了。