显示目录Asp .Net Core中可用的文件

Question

我按照本指南在目录中上传文件 https://www.learnrazorpages.com/razor-pages/forms/file-upload

我已将文件添加到“ wwwroot / files /”路径中

我想使用for循环将表中目录中的所有文件名打印出来。

问题是我不知道如何在asp .net Core中实现这一目标。

这就是我发布文件的方式

return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'SMS 2 Server',
      color: Colors.white,
      theme: ThemeData(
        //brightness: Brightness.light,
        primarySwatch: primaryWhite,

        primaryColor: Colors.blue,


        inputDecorationTheme: InputDecorationTheme(

        )
      ),
      home: HomePage(),
    );

我看到了一个如何访问文件提供程序的示例

   public async Task OnPostAsync()
        {
            if (ModelState.IsValid)
            {
                if (Documento.Length > 2097152)
                {
                    _toastNotification.AddErrorToastMessage("O tamanho deste ficheiro é superior a 2MB. ");
                }                
                else
                {                    

                    var file = Path.Combine(_environment.ContentRootPath, "wwwroot\\files\\ficha-tecnica", _context.Referencias.Where(r => r.Id == ReferenciaId).FirstOrDefault().Nome + ".pdf");

                    Path.Combine(_environment.ContentRootPath, "wwwroot\\files\\ficha-tecnica");
                    using (var fileStream = new FileStream(file, FileMode.Create))
                    {
                        await Documento.CopyToAsync(fileStream);
                    }
                }
            }

            ViewData["ReferenciaId"] = new SelectList(_context.Referencias, "Id", "Nome");
        }

尽管我在目录内容中看不到我的文件

wwwroot / files上有3个子文件夹

我可以使用调试器查看它们，但是我无法访问它们的内容以查看其中有多少文件可以打印

我忘了添加，在启动时我添加了fileprovider服务

        private readonly NoPaperContext _context;
    private readonly IHostingEnvironment _environment;
    private readonly IToastNotification _toastNotification;
    private readonly IFileProvider _fileProvider;

    public IndexModel(NoPaperContext context, IHostingEnvironment environment, IToastNotification toastNotification, IFileProvider fileProvider)
    {
        _context = context;
        _environment = environment;
        _toastNotification = toastNotification;
        _fileProvider = fileProvider;
    }

    [BindProperty]
    [Display(Name = "Referência")]
    [Required(ErrorMessage = "Selecione uma Referência")]
    public int ReferenciaId { get; set; }

    [BindProperty]
    [Required(ErrorMessage = "Selecione um Documento")]
    [RegularExpression(@"([a-zA-Z0-9\s_\\.\-:_()])+(.pdf)$", ErrorMessage = "Apenas são aceites ficheiros .pdf")]
    public IFormFile Documento { get; set; }

    public IDirectoryContents DirectoryContents { get; private set; }

    public void OnGet()
    {
        ViewData["ReferenciaId"] = new SelectList(_context.Referencias, "Id", "Nome");

        DirectoryContents = _fileProvider.GetDirectoryContents(string.empty);


    }

请注意，我的文件位于wwwroot / files / subfolder1等中。