c# - How to set asp net content root path?

Question

I'd like to provide the content root to be set via command line so I can start the application reading data from different directories, ex: dotnet run --content-root="F:/any/path"

According to the documentation IHostingEnvironment.ContentRootPath Property

Gets or sets the absolute path to the directory that contains the application content files.

Creating a default web api via dotnet new webapi. This is the default Program.cs:

 public class Program
    {
        public static void Main(string[] args)
        {
            CreateHostBuilder(args).Build().Run();
        }

        public static IHostBuilder CreateHostBuilder(string[] args) =>
            Host.CreateDefaultBuilder(args)
                .ConfigureWebHostDefaults(webBuilder =>
                {
                    webBuilder.UseStartup<Startup>();
                });
    }

In Startup.cs, including the code env.ContentRootPath = @"F:/foo/bar/";

 public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
    {
        env.ContentRootPath = @"F:/foo/bar/";

        if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();
        }

        app.UseHttpsRedirection();

        app.UseRouting();

        app.UseAuthorization();

        app.UseEndpoints(endpoints =>
        {
            endpoints.MapControllers();
        });
    }

Running the application:

C:johndoe> dotnet run
Building...
warn: Microsoft.AspNetCore.Server.Kestrel[0]
      Overriding address(es) 'https://localhost:5001, http://localhost:5000'. Binding to endpoints defined in UseKestrel() instead.
info: Microsoft.Hosting.Lifetime[0]
      Now listening on: http://localhost:5000
info: Microsoft.Hosting.Lifetime[0]
      Application started. Press Ctrl+C to shut down.
info: Microsoft.Hosting.Lifetime[0]
      Hosting environment: Development
info: Microsoft.Hosting.Lifetime[0]
      Content root path: C:johndoe

The content root path setting is ignored. The hard-coded assignment doesn't change anything.

question from:https://stackoverflow.com/questions/65891646/how-to-set-asp-net-content-root-path

Answer 1

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