如何解決MVC5中的wwwroot路徑

Question

我想在運行時編輯wwwroot的內容，~/wwwroot怎麼映射（是否有一些實用程序，如VirtualPathUtility）？

VirtualPathUtility.ToAbsolute("~/wwwroot")不工作（預期）

Answer 1

首先注入Microsoft.AspNet.Hosting.IHostingEnvironment在控制器的構造函數，然後使用MapPath方法是這樣的：

public class FooController : Controller 
{ 
    private readonly IHostingEnvironment _hostingEnvironment; 

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

    public IActionResult Bar() 
    { 
     // this maps to /wwwroot folder 
     var wwwroot = _hostingEnvironment.MapPath(""); 

     // this maps to /wwwroot/someFolder 
     var someFolder=_hostingEnvironment.MapPath("someFolder"); 
     return View(); 
    } 
}