string url = Request.Url.AbsoluteUri; //結果: http://www.mystudy.cn/web/index.aspx
string host = Request.Url.Host; //結果：www.mystudy.cn
string rawUrl = Request.RawUrl; //結果：/web/index.aspx
string localPath = Request.Url.LocalPath; //結果：/web/index.aspx

var url = document.URL; //結果：http://www.mystudy.cn/web/index.aspx
var href = document.location.href; //結果：http://www.mystudy.cn/web/index.aspx
var host = location.hostname; //結果：www.mystudy.cn