How to get root directory of project in asp net core Directory GetCurrentDirectory doesn t seem to work correctly on a mac

Question

My project has a folder structure to the tune of    Project  Project data Project Engine Project Server project front-end   In the server  running in the Project Server folder  I refer to the folder like this   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 machine this code works fine since Directory GetCurrentDirectory   reffered to the current folder  and doing  rootFolder Substring 0  rootFolder IndexOf    Project    StringComparison Ordinal       Project   Length      gets me the root folder of the project  not the bin or debug folders    But when I ran it on a mac it got  Directory GetCurrentDirectory    sent me to  usr   something else   It didn t refer to the folder where my project lies   What is the correct way to find relative paths in my project  Where should I store the data folder in a way that it is easily accessible to all the sub projects in the solution - specifically to the kestrel server project  I prefer to not have to store it in the wwwroot folder because the data folder is maintained by a different member in the team  and I just want to access the latest version  What are my options

User · Accepted Answer

Depending on where you are in the kestrel pipeline - if you have access to IConfiguration  Startup cs constructor  or IWebHostEnvironment  formerly IHostingEnvironment  you can either inject the IWebHostEnvironment into your constructor or just request the key from the configuration  Inject IWebHostEnvironment in Startup cs Constructor public Startup IConfiguration configuration  IWebHostEnvironment env         var contentRoot   env ContentRootPath     Using IConfiguration in Startup cs Constructor public Startup IConfiguration configuration         var contentRoot   configuration GetValue lt string gt  WebHostDefaults ContentRootKey

User · Answer

If that can be useful to anyone  in a Razor Page cshtml cs file  here is how to get it  add an IHostEnvironment hostEnvironment parameter to the constructor and it will be injected automatically  public class IndexModel   PageModel       private readonly ILogger lt IndexModel gt   logger      private readonly IHostEnvironment  hostEnvironment       public IndexModel ILogger lt IndexModel gt  logger  IHostEnvironment hostEnvironment                 logger   logger           hostEnvironment   hostEnvironment     has ContentRootPath property            public void OnGet                   PS  IHostEnvironment is in Microsoft Extensions Hosting namespace  in Microsoft Extensions Hosting Abstractions dll     what a mess

User · Answer

It seems IHostingEnvironment has been replaced by IHostEnvironment    and a few others   You should be able to change the interface type in   your code and everything will work as it used to  -       You can find more information about the changes at this link on GitHub   https   github com aspnet AspNetCore issues 7749      EDIT There is also an additional interface IWebHostEnvironment that   can be used in ASP NET Core applications  This is available in the   Microsoft AspNetCore Hosting namespace    Ref  https   stackoverflow com a 55602187 932448

User · Answer

As previously answered  and retracted   To get the base directory  as in the location of the running assembly  don t 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 had set the ContentRoot Directory to Directory GetCurrentDirectory   at startup undermining the default value which I had so desired  Here I commented out the offending line    public static void Main string   args                var host   new WebHostBuilder   UseKestrel                  UseContentRoot Directory GetCurrentDirectory       lt    The mistake              UseIISIntegration                UseStartup lt Program gt                 Build            host Run            Now it runs correctly - I can now navigate to sub folders of my projects root with   var pathToData   Path GetFullPath Path Combine projectRootFolder   data       I realised my mistake by reading BaseDirectory vs  Current Directory and  CodeNotFound founds answer  which was retracted because it didn t work because of the above mistake  which basically can be found here  Getting WebRoot Path and Content Root Path in Asp net Core

User · Answer

Working on  Net Core 2 2 and 3 0 as of now   To get the projects root directory within a Controller    Create a property for the hosting 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 projects root path  string projectRootPath    hostingEnvironment ContentRootPath     To get the  wwwroot  path  use   hostingEnvironment WebRootPath

User · Answer

If you are using ASP NET MVC Core 3 or newer  IHostingEnvironment has been deprecated and replaced with IWebHostEnvironment  public Startup IWebHostEnvironment webHostEnvironment        var webRootPath   webHostEnvironment WebRootPath

User · Answer

In some cases  hostingEnvironment ContentRootPath and System IO Directory GetCurrentDirectory   targets to source directory  Here is bug about it   The solution proposed there helped me  Path GetDirectoryName Assembly GetEntryAssembly   Location

User · Answer

Try looking here  Best way to get application folder path  To quote from there      System IO Directory GetCurrentDirectory   returns the current   directory  which may or may not be the folder where the application is   located  The same goes for Environment CurrentDirectory  In case you   are using this in a DLL file  it will return the path of where the   process is running  this is especially true in ASP NET

User · Answer

I solved the problem with this code   using System IO   var path   Path GetDirectoryName Assembly GetEntryAssembly   Location Substring 0  Assembly GetEntryAssembly   Location IndexOf  bin

[c#] How to get root directory of project in asp.net core. Directory.GetCurrentDirectory() doesn't seem to work correctly on a mac

Inject `IWebHostEnvironment` in `Startup.cs` Constructor

Using IConfiguration in Startup.cs Constructor

Examples related to c#

Examples related to asp.net-core

[c#] How to get root directory of project in asp.net core. Directory.GetCurrentDirectory() doesn't seem to work correctly on a mac

Inject IWebHostEnvironment in Startup.cs Constructor

Using IConfiguration in Startup.cs Constructor

Examples related to c#

Examples related to asp.net-core

Inject `IWebHostEnvironment` in `Startup.cs` Constructor