因为它正由另一个进程的进程无法访问文件 - 使用静态类 [英] The process cannot access the file because it is being used by another process - using static class

问题描述

我得到的错误该进程无法访问该文件，因为它正由另一个进程当我试图删除我刚刚上传的文件（这是文件后至少几秒钟被上传，所以我确保他们写完）。任何想法，为什么出现这种情况？ PS：我生成缩略图删除没有问题，但原稿莫名其妙地锁定。

  VAR FileExt = Path.GetExtension（photo.File.FileName）;
            VAR文件路径= Path.Combine（使用Server.Mappath（〜/ App_Data文件/+ photo.ClientId），photo.PhotoId.ToString（））+ FileExt;
            photo.File.SaveAs（文件路径）;
            变种ThumbFilePath = Path.Combine（使用Server.Mappath（〜/ App_Data文件/+ photo.ClientId），photo.PhotoId.ToString（）+_thumbnail）+ FileExt;
            PhotoTools.MakeThumbnail（文件路径，ThumbFilePath，0.15）;
            返回RedirectToAction（创建）;
 

里面一个光工具类...

 公共静态无效MakeThumbnail（字符串ImgIn，串ImgOut，双百分号）
    {
        图片IMG = Image.FromFile（ImgIn）;
        双宽度= img.Width *百分比;
        双高= img.Height *百分比;
        MakeThumbnail（ImgIn，ImgOut，（INT）宽，（INT）高度）;
    }
 

删除功能...

 公众的ActionResult DeleteConfirmed（INT ID）
    {
        Client客户端= db.Clients.Find（ID）;
        db.Clients.Remove（客户端）;
        db.SaveChanges（）;
        如果（Directory.Exists（使用Server.Mappath（〜/ App_Data文件/+ ID）））
        {
            Directory.Delete（使用Server.Mappath（〜/ App_Data文件/）+ ID，真实）;
        }
        返回RedirectToAction（「指数」）;
    }
 

解决方案

在您MakeThumbnail方法，确保你调用的Dispose（）在图片类型。这或使用使用语法：

 使用（图片IMG = Image.FromFile（ImgIn））
{
    //你的code
}
 

I get the error "The process cannot access the file because it is being used by another process" when I attempt to delete the files I just uploaded (this is at least a few seconds after the files were uploaded, so I am sure they are finished writing). Any ideas why this occurs? PS: The thumbnails I generate delete without a problem, but the originals are locked somehow.

            var FileExt = Path.GetExtension(photo.File.FileName);
            var FilePath = Path.Combine(Server.MapPath("~/App_Data/" + photo.ClientId), photo.PhotoId.ToString()) + FileExt;
            photo.File.SaveAs(FilePath);
            var ThumbFilePath = Path.Combine(Server.MapPath("~/App_Data/" + photo.ClientId),photo.PhotoId.ToString() + "_thumbnail") + FileExt;
            PhotoTools.MakeThumbnail(FilePath, ThumbFilePath, 0.15);
            return RedirectToAction("Create");

Inside a PhotoTools class...

    public static void MakeThumbnail(string ImgIn, string ImgOut, double Percent)
    {
        Image img = Image.FromFile(ImgIn);
        double Width = img.Width*Percent;
        double Height = img.Height*Percent;
        MakeThumbnail(ImgIn, ImgOut, (int)Width, (int)Height);
    }

Delete function...

    public ActionResult DeleteConfirmed(int id)
    {
        Client client = db.Clients.Find(id);
        db.Clients.Remove(client);
        db.SaveChanges();
        if (Directory.Exists(Server.MapPath("~/App_Data/" + id)))
        {
            Directory.Delete(Server.MapPath("~/App_Data/") + id,true);
        }
        return RedirectToAction("Index");
    }

解决方案

In your MakeThumbnail methods, make sure you're calling Dispose() on the Image types. That or use the using syntax:

using (Image img = Image.FromFile(ImgIn))
{
    // Your code
}

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