ASP.NET MVC 3. System.IO.IOException:进程无法访问文件''因为它正被另一个进程使用

时间:2012-12-26 14:53:47

标签: asp.net asp.net-mvc-3

请帮帮我。 我有一个asp.net mvc 3应用程序。我需要从服务器删除文件,但我不能。当我在本地机器上测试我的应用程序 - 删除成功,但当我在Web服务器上运行时,我有错误System.IO.IOException:进程无法访问文件''因为它正被另一个进程使用。

[HttpPost, ActionName("Delete")]
    public ActionResult DeleteConfirmed(int id)
    {
     ...
     if (ad.AdPhoto1 != null)
        {
            System.IO.File.Delete(AppDomain.CurrentDomain.BaseDirectory + "Content/photos/" + ad.AdPhoto1);
        }
    }

1 个答案:

答案 0 :(得分:0)

抱歉不是那么完整的问题,我昨天没有那么多时间...... 该文件是图像(例如.jpg)。我有一个模特:

public class Ad
{
    public int AdId { get; set; }
    ...
    [Display(Name = "Photo")]
    public string AdPhoto1 { get; set; }
    [Display(Name = "Photo 2")]
    public string AdPhoto2 { get; set; }
    [Display(Name = "Photo 3")]
    public string AdPhoto3 { get; set; }
    [Display(Name = "Photo 4")]
    public string AdPhoto4 { get; set; }
    ...
}

当我创建一个新的“广告”时,我在服务器上传照片并将其名称写入我的模型。我是怎么做到的:

[HttpPost]
public ActionResult Create(Ad ad, int? Categories, int? SubCategories, IEnumerable<HttpPostedFileBase> fotoUpload)
{
    ...
    if (ModelState.IsValid)
        {
            int count = 1;
            foreach (var file in fotoUpload)
            {
                Random random = new Random();
                int randomItem = random.Next(1, 100);

                if (file != null)
                {
                    string path = AppDomain.CurrentDomain.BaseDirectory + "Content/photos/";
                    string filename = randomItem + count + "Photo" + Path.GetFileName(file.FileName);

                    if (Request.ContentLength > 1228800) 
                    {
                        ViewBag.FileSizeError = "Сумарный размер загружаемых вами файлов превышает ограничение в 1,2 МБ";
                        ModelState.Remove("Categories");
                        ValuteInitializer();
                        return View();
                    }

                    file.SaveAs(Path.Combine(path, filename));

                    switch (count)
                    {
                        case 1:
                            ad.AdPhoto1 = filename;
                            break;
                        case 2:
                            ad.AdPhoto2 = filename;
                            break;
                        case 3:
                            ad.AdPhoto3 = filename;
                            break;
                        case 4:
                            ad.AdPhoto4 = filename;
                            break;
                    }

                }

                count++;
            }
            if (User.Identity.IsAuthenticated)
            {
                ad.AdAuthor = User.Identity.Name;
                ad.AdVisibility = true;
                db.SaveChanges();
            }
            ad.AdData = DateTime.Now;
            ad.AdPriority = 3;
            ad.CategoryId = Categories;
            ad.SubCategoryId = SubCategories;
            db.Ads.Add(ad);
            db.SaveChanges();
            return RedirectToAction("CreateSuccess");
        }

        return View(ad);
    }         

我看了很多关于同样问题的帖子,但我找不到解决问题的方法。我想问题可能与流有关,也许。所以,我希望有人可以帮助我...