How to get absolute path in ASP.Net Core alternative way for Server.MapPath

Question

How to get absolute path in ASP net core alternative way for Server.MapPath

I have tried to use IHostingEnvironment but it doesn't give proper result.

IHostingEnvironment env = new HostingEnvironment(); var str1 = env.ContentRootPath; // Null var str2 = env.WebRootPath; // Null, both doesn't give any result  

I have one image file (Sample.PNG) in wwwroot folder I need to get this absolute path.

Answer 1

As of .Net Core v3.0, it should be IWebHostEnvironment to access the WebRootPath which has been moved to the web specific environment interface.

Inject IWebHostEnvironment as a dependency into the dependent class. The framework will populate it for you

public class HomeController : Controller {     private IWebHostEnvironment _hostEnvironment;      public HomeController(IWebHostEnvironment environment) {         _hostEnvironment = environment;     }      [HttpGet]     public IActionResult Get() {         string path = Path.Combine(_hostEnvironment.WebRootPath, "Sample.PNG");         return View();     } } 

You could go one step further and create your own path provider service abstraction and implementation.

public interface IPathProvider {     string MapPath(string path); }  public class PathProvider : IPathProvider {     private IWebHostEnvironment _hostEnvironment;      public PathProvider(IWebHostEnvironment environment) {         _hostEnvironment = environment;     }      public string MapPath(string path) {         string filePath = Path.Combine(_hostEnvironment.WebRootPath, path);         return filePath;     } } 

And inject IPathProvider into dependent classes.

public class HomeController : Controller {     private IPathProvider pathProvider;      public HomeController(IPathProvider pathProvider) {         this.pathProvider = pathProvider;     }      [HttpGet]     public IActionResult Get() {         string path = pathProvider.MapPath("Sample.PNG");         return View();     } } 

Make sure to register the service with the DI container

services.AddSingleton<IPathProvider, PathProvider>(); 

Answer 2

.NET Core 3.0

Var 1:

string path = System.IO.Directory.GetCurrentDirectory(); 

Var 2:

string path = AppDomain.CurrentDomain.BaseDirectory.Substring(0, AppDomain.CurrentDomain.BaseDirectory.IndexOf("\\bin"));