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+1 A:

If I'm not mistaken, Server.MapPath(ResolveUrl("~/relative/path/to/file")) is not what you want. It will produce a /rooted/path/to/file which when passed to Server.MapPath() will not yield a valid location.

Instead simply use Server.MapPath("~/relative/path/to/file");

Update

The problem you are experiencing is due to the fact that you are including the virtual directory name ("portal") in your relative URL. Your relative URL does not need to specify the virtual directory name, just the path to the desired file relative to the root of the application.

Nathan Taylor 2010-09-10 17:01:55

That still gives me the same results as a the resolveurl...C:\Documents and Settings\jjohnson\My Documents\Visual Studio 2008\WebSites\clientsite\localhost\portal\testFile.xlsx

Jeremy 2010-09-10 17:11:29

@Jeremy See my updated answer. The problem is that you are specifying the virtual directory name in the relative URL when you should not be. I have just tested and confirmed this on my own system.

Nathan Taylor 2010-09-10 18:39:17

@Nathan, thank you so much for your patience on this but I'm still having trouble. If I understand you correctly, if I want to get to the folder /portal/help_desk (where portal is my virtual directory) I would be looking at Server.MapPath("~/help_desk"); but when I do that, I get C:\\Inetpub\\clientsite\\help_desk which is the path for the project with help_desk stuck on the end when I'm trying to get to C:\digital_communications_report_portal\help_desk (the root folder being where portal points to).

Jeremy 2010-09-13 15:08:43

I'll tell you what I'm trying to do...I'm trying to display the folders and files in the virtual directory. The folders should be links that drill down to child folders and the files should be downloadable links. So in theory, I click on the help_desk folder and using a DirectoryInfo object, get a list of the folders in help_desk and with a FileInfo object, get testFile.xlsx. All members of these two objects get assigned to hyperlink tag. I have all the functionality working localy but when I try to run it through IIS as a virtual directory I start to get into trouble.

Jeremy 2010-09-13 15:16:09

@Jeremy do you experience the same difficulties if you execute the application in a non-virtual directory- i.e. in the root of your web server?

Nathan Taylor 2010-09-13 15:17:46

No locally, everything works fine...if I were working locally, the app is done! Unfortunately, I'm not so lucky. :)

Jeremy 2010-09-13 15:27:02

Minor Update: Well, I messed around with Server.UrlPathEncode and was able to hardcode a link that gets to the testFile.xlsx for download. That works. So my problem seems to be just with the physical path for navigating the files and directories through DirectoryInfo and FileInfo. That's where I seem to be having problem with Server.MapPath.

Jeremy 2010-09-13 15:33:09

Minor Update 2: string folderPath = Server.MapPath("/portal"); DirectoryInfo di = new DirectoryInfo(folderPath); actually gets me to the right folder now. {C:\digital_communications_report_portal} base {System.IO.FileSystemInfo}: {C:\digital_communications_report_portal}Exists: trueName: "digital_communications_report_portal"Parent: {}Root: {C:\} However, di.GetDirectories() gives "Access to the path 'C:\digital_communications_report_portal' is denied." And when I change folderPath to "portal/help_desk" and check di.exists, it says false even though I know it's there.

Jeremy 2010-09-13 15:49:59

@Nathan, it looks like the final piece to the puzzle was simply permissions on the folder. I added aspnet as a user to the folder and all seems to be right with the world. Thank you so much for all your help, guidance and patience.

Jeremy 2010-09-13 16:53:32

@Jeremy I'm glad you got it, I don't think I would have guessed that!

Nathan Taylor 2010-09-13 17:05:06

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