大家应该知道，微软的URLRewrite能够对URL进行重写，但是也只能对域名之后的部分进行重写，而不能对域名进行重写，如：可将
http://http://www.abc.com//1234/ 重写为
http://www.abc.com/show.aspx?id=1234 但不能将
http://1234.abc.com/ 重写为
http://www.abc.com/show.aspx?id=1234。
要实现这个功能，前提条件就是
http://www.abc.com/ 是泛解析的，再就是要修改一下URLRewriter了。
总共要修改2个文件
1.BaseModuleRewriter.cs
protected virtual void BaseModuleRewriter_AuthorizeRequest(object sender, EventArgs e)
{
HttpApplication app = (HttpApplication) sender;
Rewrite(app.Request.Path, app);
} 改为
protected virtual void BaseModuleRewriter_AuthorizeRequest(object sender, EventArgs e)
{
HttpApplication app = (HttpApplication) sender;
Rewrite(app.Request.Url.AbsoluteUri, app);
} 就是将 app.Request.Path 替换成了 app.Request.Url.AbsoluteUri
2.ModuleRewriter.cs
for(int i = 0; i < rules.Count; i++)
{
// get the pattern to look for, and Resolve the Url (convert ~ into the appropriate directory)
string lookFor = "^" + RewriterUtils.ResolveUrl(app.Context.Request.ApplicationPath, rules[i].LookFor) + "$";
// Create a regex (note that IgnoreCase is set)
Regex re = new Regex(lookFor, RegexOptions.IgnoreCase);
// See if a match is found
if (re.IsMatch(requestedPath))
{
// match found - do any replacement needed
string sendToUrl = RewriterUtils.ResolveUrl(app.Context.Request.ApplicationPath, re.Replace(requestedPath, rules[i].SendTo));
// log rewriting information to the Trace object
app.Context.Trace.Write("ModuleRewriter", "Rewriting URL to " + sendToUrl);
// Rewrite the URL
RewriterUtils.RewriteUrl(app.Context, sendToUrl);
break; // exit the for loop
}
} 改为
for(int i = 0; i < rules.Count; i++)
{
// get the pattern to look for, and Resolve the Url (convert ~ into the appropriate directory)
string lookFor = "^" + rules[i].LookFor + "$";
// Create a regex (note that IgnoreCase is set)
Regex re = new Regex(lookFor, RegexOptions.IgnoreCase);
// See if a match is found
if (re.IsMatch(requestedPath))
{
// match found - do any replacement needed
string sendToUrl = RewriterUtils.ResolveUrl(app.Context.Request.ApplicationPath, re.Replace(requestedPath, rules[i].SendTo));
// log rewriting information to the Trace object
app.Context.Trace.Write("ModuleRewriter", "Rewriting URL to " + sendToUrl);
// Rewrite the URL
RewriterUtils.RewriteUrl(app.Context, sendToUrl);
break; // exit the for loop
}
} 将
string lookFor = "^" + RewriterUtils.ResolveUrl(app.Context.Request.ApplicationPath, rules[i].LookFor) + "$";
改成了
string lookFor = "^" + rules[i].LookFor + "$";
完成这2处改动之后重新编译项目，将生成的dll复制到bin目录下。
再就是写web.config里的重写正则了
<RewriterRule>
<LookFor>http://(\d+)\.abc\.com/</LookFor>
<SendTo>/show.aspx?id=$1</SendTo>
</RewriterRule> 好了大功告成，你在IE地址栏输入
http://1234.abc.com/，就可以看到
http://www.abc.com/show.aspx?id=1234的结果了
若你在实际应用中碰到了问题，请查看文章 "修改UrlRewrite以对域名进行重写"需要注意的问题 ，希望能够帮助你！
附：
URLRewriter 的相关资料http://www.microsoft.com/china/msdn/library/webservices/asp.net/URLRewriting.mspx
另:本人有偿提供完整用户域名解决方案,QQ:25514088,Email:kerry-jiang#hotmail.com