ASP.NET(C#)怎样取得当前页面的文件名

Request.ApplicationPath: /testweb
Request.CurrentExecutionFilePath: /testweb/default.aspx
Request.FilePath: /testweb/default.aspx
Request.Path: /testweb/default.aspx
Request.PathInfo:
Request.PhysicalApplicationPath: E:\WWW\testweb\
Request.PhysicalPath: E:\WWW\testweb\default.aspx
Request.RawUrl: /testweb/default.aspx
Request.Url.AbsolutePath: /testweb/default.aspx
Request.Url.AbsoluteUri: http://www./testweb/default.aspx
Request.Url.Host: www.
Request.Url.LocalPath: /testweb/default.aspx