截取 http://www.rczjp.cn/A/B/C/index.aspx?cid=11&sid=22解决方案

截取 http://www.rczjp.cn/A/B/C/index.aspx?cid=11&sid=22
http://www.rczjp.cn/A/B/C/index.aspx?cid=11&sid=22

我只要sid=22
怎么截取？？

[解决办法]

C# code

string tempStr = "http://www.rczjp.cn/A/B/C/index.aspx?cid=11&sid=22";            string sid = Regex.Match(tempStr, @"(?<=http://.+?\?.*?)sid=\d+").Value;//sid=22
[解决办法]
str=url.Substring(LastIndexOf("&")+1);
[解决办法]
C# code
var uri = new System.Uri("http://www.rczjp.cn/A/B/C/index.aspx?cid=11&sid=22");var query = System.Web.HttpUtility.ParseQueryString(uri.Query.SubString(1));
[解决办法]
js
JScript code
正则分析法。function GetQueryString(name) {   var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)","i");   var r = window.location.search.substr(1).match(reg);   if (r!=null) return unescape(r[2]); return null;}alert(GetQueryString("参数名1"));alert(GetQueryString("参数名2"));alert(GetQueryString("参数名3"));