How to map virtual path to physical path?

Question

I know I can get WebRoot by HostingEnvironment (Microsoft.AspNet.Hosting namespace).

I need to get a physical path according to a virtual path created in IIS within my web application. In IIS, the website root points to wwwroot of my published site and there is a virtual directory added in IIS which points to a folder outside of my wwwroot. I hope I can get the physical path of that virtual directory. In MVC 5 or earlier version, I can use HostingEnvironment.MapPath (System.Web namespace) or Server.MapPath, what should I do in MVC 6?

EDIT:

It's not the virtual path but the virtual directory added in IIS. I hope I can get the physical path of that virtual directory. I think virtual directory is a particular feature of IIS, which looks like a sub path of a full virtual path but can be a folder outside of physical web root folder.

Oct 4, 2015

Refer to this issue in ASP.NET 5 Hosting repo, So far, it doesn't seem we can get the physical path of a virtual directory in IIS.

Answer 1

You can use IApplicationEnvironment for that, which contains the property ApplicationBasePath

    private readonly IApplicationEnvironment _appEnvironment;

    public HomeController(IApplicationEnvironment appEnvironment)
    {
        _appEnvironment = appEnvironment;
    }

    public IActionResult Index()
    {
        var rootPath = _appEnvironment.ApplicationBasePath;
        return View();
    }

Answer 2

On Azure Web Apps, you'll find the wwwroot is in a different place:

All of the source code gets copied to D:/Home/site/approot/src/{WebsiteName} except the wwwroot. IApplicationEnvironment.ApplicationBasePath points here.

The wwwroot goes in D:/Home/site/wwwroot. IHostingEnvironment.WebRootPath points here.

It still won't work with IIS virtual directories. There is a WebRootFileProvider property on the IHostingEnvironment interface which provides an IFileProvider with methods like GetFileInfo(string subpath). I read the code and found subpath is a physical one, not a virtual one.

Obviously, in a self-hosted setup, there is no IIS. If you rely on IIS and really must do this, you'll probably have to reference System.Web.

HTH.