How to get the project root directory in asp.net core. Directory.GetCurrentDirectory () doesn't seem to work correctly on mac

Question

My project has a folder structure:

• Project,
• Project / Data
• Project / Engine
• Project / Server
• project / front end

On the server (running in the Project / Server folder), I refer to the folder as follows:

var rootFolder = Directory.GetCurrentDirectory(); rootFolder = rootFolder.Substring(0, rootFolder.IndexOf(@"\Project\", StringComparison.Ordinal) + @"\Project\".Length); PathToData = Path.GetFullPath(Path.Combine(rootFolder, "Data")); var Parser = Parser(); var d = new FileStream(Path.Combine(PathToData, $"{dataFileName}.txt"), FileMode.Open); var fs = new StreamReader(d, Encoding.UTF8); 

On my Windows computer, this code works fine, because Directory.GetCurrentDirectory() added to the current folder and does

 rootFolder.Substring(0, rootFolder.IndexOf(@"\Project\", StringComparison.Ordinal) + @"\Project\".Length); 

gets the project root folder (not bin or debug folders). But when I ran it on mac, it got " Directory.GetCurrentDirectory() " sent me to / usr // [something else]. This does not apply to the folder where my project is located.

What is the correct way to find relative paths in my project? Where should I store the data folder so that it is easily accessible for all subprojects in the solution - in particular, for the kestrel server project? I prefer not to store it in the wwwroot folder, because the data folder is maintained by another member on the team, and I just want to access the latest version. What are my options?

Answer 1

Depending on where you are in the kestrel pipeline - if you have access to IConfiguration ( Startup.cs constructor) or IHostingEnvironment you can either enter IHostingEnvironment into the constructor or simply request a configuration key.

Introduce IHostingEnvironment in Startup.cs Constructor

 public Startup(IConfiguration configuration, IHostingEnvironment env) { var contentRoot = env.ContentRootPath; } 

Using IConfiguration in Startup.cs Constructor

 public Startup(IConfiguration configuration) { var contentRoot = configuration.GetValue<string>(WebHostDefaults.ContentRootKey); } 

Answer 2

Powered by .Net Core 2.2 and 3.0 at the moment.

To get the root directory of projects in the controller:

• Create a property for the placement environment

   private readonly IHostingEnvironment _hostingEnvironment; 

• Add Microsoft.AspNetCore.Hosting to your controller

   using Microsoft.AspNetCore.Hosting; 

• Register the service in the constructor

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

• Now, to get the root path of the projects

   string projectRootPath = _hostingEnvironment.ContentRootPath; 

To get the path " wwwroot ", use

 _hostingEnvironment.WebRootPath 

Answer 3

As previously answered (and removed). To get the base directory, as in the location of the running assembly, do not use Directory.GetCurrentDirectory (), rather get it from IHostingEnvironment.ContentRootPath.

 private IHostingEnvironment _hostingEnvironment; private string projectRootFolder; public Program(IHostingEnvironment env) { _hostingEnvironment = env; projectRootFolder = env.ContentRootPath.Substring(0, env.ContentRootPath.LastIndexOf(@"\ProjectRoot\", StringComparison.Ordinal) + @"\ProjectRoot\".Length); } 

However, I made an additional error: I set the ContentRoot Directory to Directory.GetCurrentDirectory () at startup, undermining the default value that I wanted so much! Here I commented on an offensive line:

  public static void Main(string[] args) { var host = new WebHostBuilder().UseKestrel() // .UseContentRoot(Directory.GetCurrentDirectory()) //<== The mistake .UseIISIntegration() .UseStartup<Program>() .Build(); host.Run(); } 

Now it works correctly - now I can go to the subfolders of my project with:

 var pathToData = Path.GetFullPath(Path.Combine(projectRootFolder, "data")); 

I realized my mistake by reading BaseDirectory vs. The Current Directory and @CodeNotFound found the answer (which was removed because it did not work due to the above error), which can mainly be found here: Getting the path and path to the WebRoot root directory in Core Asp.net

Answer 4

In some cases, _hostingEnvironment.ContentRootPath and System.IO.Directory.GetCurrentDirectory() oriented to the source directory. Here is a mistake about it.

The solution proposed there helped me

 Path.GetDirectoryName(Assembly.GetEntryAssembly().Location); 

Answer 5

Try to find here: The best way to get the path to the application folder

To quote from there:

System.IO.Directory.GetCurrentDirectory() returns the current directory, which may or may not be the folder in which the application is located. The same goes for Environment.CurrentDirectory. If you use this in a DLL file, it will return the path where the process is running (this is especially true in ASP.NET).

Answer 6

I solved the problem with this code:

 using System.IO; var path = Path.GetDirectoryName(Assembly.GetEntryAssembly().Location.Substring(0, Assembly.GetEntryAssembly().Location.IndexOf("bin\\"))) 

Answer 7

If you are using ASP.NET MVC Core 3 or later, IHostingEnvironment deprecated and replaced with IWebHostEnvironment

 public Startup(IWebHostEnvironment webHostEnvironment) { var webRootPath = webHostEnvironment.WebRootPath; }