asp.net Core webapi 獲取應用程序所在目錄的三種方式

1. string basePath1 = AppContext.BaseDirectory;

例如：D:\后端項目\testCore\test.WebApi\bin\Debug\net6.0\

2.string basePath2 =Path.GetDirectoryName(typeof(Program).Assembly.Location);

例如：D:\后端項目\testCore\test.WebApi\bin\Debug\net6.0\

3.從ASP.NET Core RC2開始，可以通過依賴注入 IHostingEnvironment 服務對象來取得Web根目錄和內容根目錄的物理路徑，如下所示：

using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Mvc;
 
namespace AspNetCorePathMapping
{
    public class HomeController : Controller
    {
        private readonly IHostingEnvironment _hostingEnvironment;
 
        public HomeController(IHostingEnvironment hostingEnvironment)
        {
            _hostingEnvironment = hostingEnvironment;
        }
 
        public ActionResult Index()
        {
            string webRootPath = _hostingEnvironment.WebRootPath;
            string contentRootPath = _hostingEnvironment.ContentRootPath;
          //webRootPath: D:\后端項目\testCore\test.WebApi\wwwroot

          // contentRootPath: D:\后端項目\testCore\test.WebApi

            return Content(webRootPath + "\n" + contentRootPath);
        }
    }
}