转来
假设当前页完整地址是：http://www.test.com:80/aaa/bbb.aspx?id=5&name=kelli
"http://"是协议名
"www.test.com"是域名
"80"是端口号
"aaa"是站点名
"bbb.aspx"是页面名（文件名）
"id=5&name=kelli"是参数
【1】获取 完整url （协议名+域名+站点名+文件名+参数）
string url=Request.Url.ToString();
url=http://www.test.com/aaa/bbb.aspx?id=5&name=kelli
【2】获取 站点名+页面名+参数：
string url=Request.RawUrl;
(或 string url=Request.Url.PathAndQuery;)
url=/aaa/bbb.aspx?id=5&name=kelli
【3】获取 站点名+页面名：
string url=HttpContext.Current.Request.Url.AbsolutePath;
(或 string url= HttpContext.Current.Request.Path;)
url=aaa/bbb.aspx
【4】获取 域名：
string url=HttpContext.Current.Request.Url.Host;
url=www.test.com
【5】获取 参数：
string url= HttpContext.Current.Request.Url.Query;
url=?id=5&name=kelli
【6】获取 端口：
int port = HttpContext.Current.Request.Url.Port;
port = 80
網址：http://localhost:1897/News/Press/Content.aspx/123?id=1#toc Request.ApplicationPath / Request.PhysicalPath D:\Projects\Solution\web\News\Press\Content.aspx System.IO.Path.GetDirectoryName(Request.PhysicalPath) D:\Projects\Solution\web\News\Press Request.PhysicalApplicationPath D:\Projects\Solution\web\ System.IO.Path.GetFileName(Request.PhysicalPath) Content.aspx Request.CurrentExecutionFilePath /News/Press/Content.aspx Request.FilePath /News/Press/Content.aspx Request.Path /News/Press/Content.aspx/123 Request.RawUrl /News/Press/Content.aspx/123?id=1 Request.Url.AbsolutePath /News/Press/Content.aspx/123 Request.Url.AbsoluteUri http://localhost:1897/News/Press/Content.aspx/123?id=1 Request.Url.Scheme http Request.Url.Host localhost Request.Url.Port 1897 Request.Url.Authority localhost:1897 Request.Url.LocalPath /News/Press/Content.aspx/123 Request.PathInfo /123 Request.Url.PathAndQuery /News/Press/Content.aspx/123?id=1 Request.Url.Query ?id=1 Request.Url.Fragment Request.Url.Segments 5个 [0]/ [1]News/ [2]Press/ [3]Content.aspx/ [4]123