Reverse Server.MapPath()

Here's a simple ASP.NET function that will get the opposite result of the Server.MapPath() function. This comes in handy when you're retrieving files recently saved by your web application. Pass it a fully qualified path and it returns a URL

Public Function MapURL(ByVal Path As String) As String
     Dim AppPath As String = _
     HttpContext.Current.Server.MapPath("~")
     Dim url As String = String.Format("~{0}" _
     , Path.Replace(AppPath, "").Replace("\", "/"))
     Return url
End Function

Of course, you will have to make sure that the path is valid and the file is under the virtual root.

Enjoy!

Print posted @ Thursday, August 03, 2006 10:08 AM

Feedback

# re: Reverse Server.MapPath()

Ah, very handy. Good thinking. Bless my fileinfos. :) 8/19/2006 9:10 AM | Rabid

# re: Reverse Server.MapPath()

Hi..

I was searching for this.. and it is amazing.. Thanks a lot!! Ur post is valuable. 9/12/2006 5:06 AM | Dunlop

# re: Reverse Server.MapPath()

Please convert "?" to "/"
and convert "=" to "/" 3/26/2007 12:09 AM | vignesh

# re: Reverse Server.MapPath()

any chance to make it in JScript?
I have a full application done that way, and need this in JScript.

Thanks in advance 3/27/2007 3:15 PM | Lord Vader

# re: Reverse Server.MapPath()

When using your script, I found that it didn't work when the application is running in a directory below the root of the URL. I changed the setting of the url variable to use the following code:

string url = String.Format("{0}" , HttpContext.Current.Request.ApplicationPath + path.Replace(AppPath, "").Replace("\\", "/"));

This just inserts the path of the application on the server before putting in the path of the image relative to the application.
7/13/2007 3:42 PM | Eric Steuart

# re: Reverse Server.MapPath()

very cool little trick..thanks!! 10/31/2007 5:08 PM | Punit

Albert Raiani