ASP.Net Paths

Here's a list of the Path related properties on the Request object (and the Page object):

Request Property	Function and Example
ApplicationPath	Returns the a Web server relative path to your application root /WestwindWebStore/
PhysicalApplicationPath	Returns a local file system path to your application root D:\inetpub\wwwroot\WestWindWebStore\
PhysicalPath	Returns the full file system path to the currently executing script D:\inetpub\wwwroot\WestWindWebStore\Item.aspx
CurrentExecutionFilePath FilePath Path	In most situations all of these return the virtual path to the currently executing script relative to the Web Server root. /WestwindWebStore/item.aspx
PathInfo	Returns any extra path following the script name. Rarely used – this value is usually blank. /WestwindWebStore/item.aspx/ExtraPathInfo
RawUrl	Returns the application relative URL including querystring or pathinfo /WestwindWebStore/item.aspx?sku=WWHELP30
Url	Returns the fully qualified URL including domain and protocol http://www.west-wind.com/Webstore/item.aspx?sku=WWHELP30
Page.TemplateSourceDirectory Control.TemplateSourceDirectory	Returns the virtual path of the currently executing control (or page). Very useful if you need to know the location of your ASCX control instead of the location of the page. /WestwindWebStore/admin

for more info. http://www.west-wind.com/weblog/posts/269.aspx