Getting relative virtual path from physical path

Question

How can I get the relative virtual path from the physical path in asp.net? The reverse method is like below:

Server.MapPath("Virtual Path Here");

But what is the reverse of the upper method?

Consider that multiple virtual directories in IIS may map to the same physical directory, even within a single application. How then can this question be answered? — Damien_The_Unbeliever, May 21 '11 at 13:09

score 34 · Accepted Answer · edited May 23 '17 at 12:26

34

Maybe this question is what you're looking for. There they suggest:

String RelativePath = AbsolutePath.Replace(Request.ServerVariables["APPL_PHYSICAL_PATH"], String.Empty);

edited May 23 '17 at 12:26

Community

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answered May 21 '11 at 11:51

Felix Martinez

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score 26 · Answer 2 · answered Dec 07 '11 at 07:15

26

    public static string MapPathReverse(string fullServerPath)
    {            
        return @"~\" + fullServerPath.Replace(HttpContext.Current.Request.PhysicalApplicationPath,String.Empty);
    }

answered Dec 07 '11 at 07:15

Iman

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This works but in my case PhysicalApplicationPath was in lower case for some reason but the path in my fullServerPath wasn't even though it was read from the file system. Since Windows doesn't have case insensitive paths it's probably okay to convert it all to lower case – Matthew Lock Jan 12 '17 at 08:04

score 14 · Answer 3 · answered Sep 20 '15 at 06:25

14

Request.ServerVariables["APPL_PHYSICAL_PATH"]

is fine, but not always. It is available only if there's a HTTP request.

On the other hand the call

HostingEnvironment.ApplicationPhysicalPath

is always available.

answered Sep 20 '15 at 06:25

Alexander Christov

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score 10 · Answer 4 · edited Jun 24 '15 at 08:31

10

You could also do something like this:

string relativePath = absolutePath.Replace(HttpContext.Current.Server.MapPath("~/"), "~/").Replace(@"\", "/");

The advantage is, that you don't need HttpContext.Current.Request.

edited Jun 24 '15 at 08:31

Rory McCrossan

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answered Jun 24 '15 at 08:07

Pierre Chavaroche

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This is actually a much better answer as mentioned because you don't need the request object. – Maxim Gershkovich Aug 21 '17 at 10:57

Getting relative virtual path from physical path

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