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我有一个网站已经运行了将近 6 个月。网站上有一个部分，用户最多可以上传 5 个属性图像。对于每 10 个用户，我有一个用户会遇到 System.NotSupportedException 问题。由于并非所有用户都发生这种情况，而且我似乎无法重现此错误，因此我不确定如何找到解决方案。查看错误消息，我认为这可能与他们机器上的网络配置有关，但我不能 100% 确定。任何想法/建议将不胜感激。

这是上传图像的代码。

private void UploadPhotos()
{
    Stream objStream;
    HttpFileCollection uploads = HttpContext.Current.Request.Files;
    for (int i = 0; i < uploads.Count; i++)
    {
        if (uploads[i].ContentLength == 0)
            continue;
        try
        {
            string fileName = Path.Combine(image + "-" + i.ToString(), uploads[i].FileName);
            //uploads[i].SaveAs(Server.MapPath("~/ExtendedImages/") + fileName);
            using (new Impersonator("serverusername", @"serverlocation", "serverpassword!"))
            {
                try
                {
                    uploads[i].SaveAs(@"serverlocation" + fileName);
                }
                catch (NotSupportedException ex)
                {
                    uploads[i].SaveAs(Server.MapPath("~/ExtendedImages/") + fileName);
                }
            }
            //uploads[i].SaveAs(Server.MapPath("~/ExtendedImages/") + fileName);
            byte[] myimage = new byte[uploads[i].ContentLength];
            objStream = uploads[i].InputStream;
            objStream.Read(myimage, 0, uploads[i].ContentLength);

            System.Drawing.Image Image1;
            System.Drawing.Image Thumbnail;

            Image1 = new Bitmap(objStream);

            Image1.RotateFlip(System.Drawing.RotateFlipType.Rotate180FlipNone);
            Image1.RotateFlip(System.Drawing.RotateFlipType.Rotate180FlipNone);

            int NewWidth = 380;
            int MaxHeight = 400;

            if (Image1.Width <= NewWidth)
            {
                NewWidth = Image1.Width;
            }

            int NewHeight = Image1.Height * NewWidth / Image1.Width;

            if (NewHeight > MaxHeight)
            {
                NewWidth = Image1.Width * MaxHeight / Image1.Height;
                NewHeight = MaxHeight;
            }
            System.Drawing.Image NewImage = Image1.GetThumbnailImage(NewWidth, NewHeight, null, IntPtr.Zero);
            Thumbnail = Image1.GetThumbnailImage(100, 80, null, IntPtr.Zero);
            MemoryStream ms = new MemoryStream();
            MemoryStream ms2 = new MemoryStream();
            Thumbnail.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
            NewImage.Save(ms2, System.Drawing.Imaging.ImageFormat.Jpeg);
            Photos photos = new Photos();
            photos.ID = HomeTourSession.HometourName;
            photos.AdId = (int)Session["adid"];
            photos.FullPhoto = ms2.ToArray();
            photos.ThumbnailPhoto = ms.ToArray();
            photos.AlternateText = "";
            photos.Insert();
        }
        catch (Exception exp)
        {
            throw new Exception("Error occured: " + exp);
        }
    }
}

这是一些用户遇到的错误。

发生错误：System.NotSupportedException：不支持给定路径的格式。在 System.Security.Util.StringExpressionSet.CanonicalizePath(String path, Boolean needFullPath) 在 System.Security.Util.StringExpressionSet.CreateListFromExpressions(String[] str, Boolean needFullPath) 在 System.Security.Permissions.FileIOPermission.AddPathList(FileIOPermissionAccess 访问， System.Security.Permissions.FileIOPermission..ctor（FileIOPermissionAccess 访问，AccessControlActions 控件，String[] pathList，布尔 checkForDuplicates，布尔 needFullPath）在 System.IO .FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share,

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