asp.net用url重写URLReWriter实现任意二级域名

已经有人写了

http://www.cnblogs.com/notus/archive/2007/03/13/673222.html

URLReWriter.DLL     

http://www.microsoft.com/china/msdn/library/webservices/asp.net/URLRewriting.mspx

http://www.cnblogs.com/jzywh/archive/2005/09/29/246650.html

http://www.cnblogs.com/jzywh/archive/2006/02/20/334004.html

如果出现未将对象引用设置到对象的实例的异常 请修改       问题解决~

            try
            {
                context.RewritePath(sendToUrlLessQString, String.Empty, queryString);

            }
            catch
            {
                context.RewritePath(sendToUrlLessQString+"?"+queryString);
            }

因为把请球直接交给asp.net处理，IIS定义的默认首页将会失效，出现这种情形单独为首页配置一下 解决问题

<RewriterConfig>
        <Rules>
            <RewriterRule>
            <LookFor>http://www\.Ranchweb\.com\.cn/</LookFor>
            <SendTo>/Default.aspx</SendTo>
            </RewriterRule>            
            <RewriterRule>
                <LookFor>http://(\w+)\.Ranchweb\.com\.cn/</LookFor>
                <SendTo>/Valentine.aspx?id=$1</SendTo>
            </RewriterRule>            
        </Rules>
    </RewriterConfig>