What is the equivalent of Server.MapPath in ASP.NET Core?

by

.Net 6 (.NetCore 3 and above)

For example I want to locate ~/wwwroot/CSS

public class YourController : Controller
{
    private readonly IWebHostEnvironment _webHostEnvironment;

    public YourController (IWebHostEnvironment webHostEnvironment)
    {
        _webHostEnvironment= webHostEnvironment;
    }

    public IActionResult Index()
    {
        string webRootPath = _webHostEnvironment.WebRootPath;
        string contentRootPath = _webHostEnvironment.ContentRootPath;

        string path ="";
        path = Path.Combine(webRootPath , "CSS");
        //or path = Path.Combine(contentRootPath , "wwwroot" ,"CSS" );
        return View();
    }
}

Some Tricks

Also if you don’t have a controller or service,follow last Part and register it’s class as a singleton.
Then, in Startup.ConfigureServices:

services.AddSingleton<your_class_Name>();

Finally, inject your_class_Name where you need it.

.Net Core 2

For example I want to locate ~/wwwroot/CSS

public class YourController : Controller
{
    private readonly IHostingEnvironment _HostEnvironment; //diference is here : IHostingEnvironment  vs I*Web*HostEnvironment 

    public YourController (IHostingEnvironment HostEnvironment)
    {
        _HostEnvironment= HostEnvironment;
    }

    public ActionResult Index()
    {
        string webRootPath = _HostEnvironment.WebRootPath;
        string contentRootPath = _HostEnvironment.ContentRootPath;

        string path ="";
        path = Path.Combine(webRootPath , "CSS");
        //or path = Path.Combine(contentRootPath , "wwwroot" ,"CSS" );
        return View();
    }
}

MoreDetails

Thanks to @Ashin but IHostingEnvironment is obsoleted in MVC core 3!!

according to this :

Obsolete types (warning):

Microsoft.Extensions.Hosting.IHostingEnvironment
Microsoft.AspNetCore.Hosting.IHostingEnvironment
Microsoft.Extensions.Hosting.IApplicationLifetime
Microsoft.AspNetCore.Hosting.IApplicationLifetime
Microsoft.Extensions.Hosting.EnvironmentName
Microsoft.AspNetCore.Hosting.EnvironmentName

New types:

Microsoft.Extensions.Hosting.IHostEnvironment
Microsoft.AspNetCore.Hosting.IWebHostEnvironment : IHostEnvironment
Microsoft.Extensions.Hosting.IHostApplicationLifetime
Microsoft.Extensions.Hosting.Environments

So you must use IWebHostEnvironment instead of IHostingEnvironment.

More Related Contents:

  1. I’m lost. What happened to ASP.NET MVC 5?
  2. OAuth Authorization Service in ASP.NET Core
  3. ASP.NET Core change EF connection string when user logs in
  4. ASP.NET Core Dependency Injection with Multiple Constructors
  5. ASP.NET 5 project hosting on IIS
  6. Duplicate ‘Content’ items were included. The .NET SDK includes ‘Content’ items from your project directory by default
  7. Dealing with large file uploads on ASP.NET Core 1.0
  8. How do I get the contents of a JSON file I added in the StartUp method to use it in one of my actions?
  9. What is the difference between ‘classic’ and ‘integrated’ pipeline mode in IIS7?
  10. Best way to trim strings after data entry. Should I create a custom model binder?
  11. Return XML from a controller’s action in as an ActionResult?
  12. How to receive JSON as an MVC 5 action method parameter
  13. How to add validation to my POCO(template) classes
  14. ASP.Net MVC Handling Segments with Route
  15. mvc uppercase Model vs lowercase model
  16. You must add a reference to assembly ‘netstandard, Version=2.0.0.0
  17. SSL pages under ASP.NET MVC
  18. Passing dynamic javascript values using Url.action()
  19. In asp.net mvc is it possible to make a generic controller?
  20. What is Kestrel (vs IIS / Express)
  21. Linq Orderby random ThreadSafe for use in ASP.NET
  22. Adding sub-directory to “View/Shared” folder in ASP.Net MVC and calling the view
  23. ASP.Net Core MVC – Client-side validation for custom attribute
  24. Difference Between ViewResult() and ActionResult()
  25. Streaming large file uploads to ASP.NET MVC
  26. Value cannot be null. Parameter name: items (DrodownList)
  27. ASP.NET session state and multiple worker processes
  28. ASP.NET Core RC2 SignalR Hub Context outside request thread
  29. IValidatableObject Validate method firing when DataAnnotations fails
  30. ASP.Net MVC RedirectToAction with anchor

Leave a Comment