能將 http://domain.com/test/test.aspx?id=123&type=5換成http://domain.com/test/default.aspx?par=test&id=123&type=5類似這樣的,就是把前面的URL的test取出放到URL參數中去我用string url="/test/test.aspx?id=123&type=5";string pattern="/test/(?<user>)([A-Za-z0-9]+).aspx";string temp="/test/default.aspx?par=$1";Regex regex = new Regex(pattern, RegexOptions.Compiled | RegexOptions.IgnoreCase); if (regex.IsMatch(url))            {               　　 url= regex.Replace(url, temp);  }結果返回的url 是/test/default.aspx?par=test?id=123&type=5對正則不是很了解- -b