Server.MapPath in C#

The ServerUtility class is available as an instance through the HttpContext in ASP.NET. It can be used when you are working within the ASP.NET request pipeline, as it's automatically accessible in web applications.

Using Server.MapPath in C#

For example:

System.Web.HttpContext.Current.Server.MapPath(virtualPath);//The virtual path you want to convert.

or you can also use HostingEnvironment.MapPath

System.Web.Hosting.HostingEnvironment.MapPath(virtualPath);

Using Server.MapPath to locate the correct directory.

To map a file in the root directory, you can use the Server.MapPath method like this:

string fileName = Server.MapPath("~/App_Data/myfile.txt");

In ASP.NET Core, you use IWebHostEnvironment to map paths.

For example:

public class BookController : Controller
{
    private readonly IWebHostEnvironment _env;

    public MyController(IWebHostEnvironment env)
    {
        _env = env;
    }

    public IActionResult GetFile()
    {
        string path = Path.Combine(_env.WebRootPath, "images", "logo.png");
        return File(System.IO.File.ReadAllBytes(path), "image/png");
    }
}