如果要得到傳統的ASP.Net應用程式中的相對路徑或虛擬路徑對應的伺服器物理路徑，只需要使用使用Server.MapPath()方法來取得Asp.Net根目錄的物理路徑，如下所示：

// Classic ASP.NET
public class HomeController : Controller
{
    public ActionResult Index()
    {
        string physicalWebRootPath = Server.MapPath("~/");
        
        return Content(physicalWebRootPath);
    }
}
 

但是在ASPNET Core中不存在Server.MapPath()方法，Controller基類也沒有Server屬性。

在Asp.Net Core中取得物理路徑：

從ASP.NET Core RC2開始，可以通過注入 IHostingEnvironment 服務物件來取得Web根目錄和內容根目錄的物理路徑，如下所示：

using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Mvc;

namespace AspNetCorePathMapping
{
    public
 
 class HomeController : Controller
    {
        private readonly IHostingEnvironment _hostingEnvironment;

        public HomeController(IHostingEnvironment hostingEnvironment)
        {
            _hostingEnvironment = hostingEnvironment;
        }

        public ActionResult Index()
        {
            
 
string webRootPath = _hostingEnvironment.WebRootPath;           //F:\資料字典\Centa.Data.Dictionary\Centa.Data.Web\wwwroot
            string contentRootPath = _hostingEnvironment.ContentRootPath;   //F:\資料字典\Centa.Data.Dictionary\Centa.Data.Web

            return Content(webRootPath + "\n" + contentRootPath);
        }
    }
}

ASP.NET Core RC1

在ASP.NET Core RC2之前 （就是ASP.NET Core RC1或更低版本），通過 IApplicationEnvironment.ApplicationBasePath 來獲取 Asp.Net Core應用程式的根目錄(物理路徑) ：

using Microsoft.AspNet.Mvc;
using Microsoft.Extensions.PlatformAbstractions;

namespace AspNetCorePathMapping
{
    public class HomeController : Controller
    {
        private readonly IApplicationEnvironment _appEnvironment;

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

        public ActionResult Index()
        {
            return Content(_appEnvironment.ApplicationBasePath);
        }
    }
}