.NET核心IsPostback

Question

当我尝试下载文件时，单击count递增5次，有时是6次而不是1次递增。我尝试使用Task.Delay(5000);，但它不起作用，.I我认为我可以用!ispostback方法解决它。在asp.net内核中，这个方法的等价物到底是什么?我该如何解决这个问题？

public IActionResult Download(int id)
        {
            var essay = _essayBussRepository.GetWithId(id);
            essay.NumberOfDownloads = essay.NumberOfDownloads + 1;
            Task.Delay(5000);
            _essayBussRepository.Update(essay);


            string fileName = essay.PdfName;
            string path = Path.Combine(Directory.GetCurrentDirectory(), "wwwroot/w_essay_pdf/" + fileName);


            byte[] fileBytes = System.IO.File.ReadAllBytes(path);

            return File(fileBytes, "application/force-download", fileName);
        }

Answer 1

我通过变成异步解决了这个问题。

public async Task<IActionResult> Download(int id)
        {
            var essay = _essayBussRepository.GetWithId(id);
            essay.NumberOfDownloads = essay.NumberOfDownloads + 1;
            await Task.Delay(3000);
            _essayBussRepository.Update(essay);


            string fileName = essay.PdfName;
            string path = Path.Combine(Directory.GetCurrentDirectory(), "wwwroot/w_essay_pdf/" + fileName);


            byte[] fileBytes = System.IO.File.ReadAllBytes(path);

            return File(fileBytes, "application/force-download", fileName);
        }