/**/
        /// <summary>
        /// 生成缩略图
        /// </summary>
        /// <param name="originalImagePath">源图路径(物理路径)</param>
        /// <param name="thumbnailPath">缩略图路径(物理路径)</param>
        /// <param name="width">缩略图宽度</param>
        /// <param name="height">缩略图高度</param>
        /// <param name="mode">生成缩略图的方式</param>
        public static MemoryStream MakeThumbnail(string originalImagePath, int width, int height, string mode)
        {
            WebClientX xx = new WebClientX();

            System.Drawing.Image originalImage = new Bitmap(width, height);

            try
            {
                FileInfo fi = new FileInfo(originalImagePath);
                if (fi.Exists)
                {
                    originalImage = System.Drawing.Image.FromStream(fi.OpenRead());
                }
                else
                {
                    originalImage = Image.FromStream(xx.OpenRead(originalImagePath));
                }
            }
            catch
            {
                originalImage = Image.FromStream(xx.OpenRead(originalImagePath));
            }



            System.IO.MemoryStream ms = new System.IO.MemoryStream();



            int towidth  = width;
            int toheight = height;

            int x  = 0;
            int y  = 0;
            int ow = originalImage.Width;
            int oh = originalImage.Height;

            if (ow < towidth && oh < toheight)
            {
                originalImage.Save(ms, ConvertImageFormat(originalImagePath));
            }
            else
            {
                switch (mode.ToUpper())
                {
                case "HW":         //指定高宽缩放(可能变形)
                    break;

                case "W":         //指定宽,高按比例
                    toheight = originalImage.Height * width / originalImage.Width;
                    break;

                case "H":         //指定高,宽按比例
                    towidth = originalImage.Width * height / originalImage.Height;
                    break;

                case "CUT":         //指定高宽裁减(不变形)
                    if ((double)originalImage.Width / (double)originalImage.Height > (double)towidth / (double)toheight)
                    {
                        oh = originalImage.Height;
                        ow = originalImage.Height * towidth / toheight;
                        y  = 0;
                        x  = (originalImage.Width - ow) / 2;
                    }
                    else
                    {
                        ow = originalImage.Width;
                        oh = originalImage.Width * height / towidth;
                        x  = 0;
                        y  = (originalImage.Height - oh) / 2;
                    }
                    break;

                case "AUTO":          //自动适应高度
                    if (ow > oh)
                    {
                        //newwidth = 200;
                        toheight = (int)((double)oh / (double)ow * (double)towidth);
                    }
                    else
                    {
                        //newheight = 200;
                        towidth = (int)((double)ow / (double)oh * (double)toheight);
                    }
                    break;

                default:
                    break;
                }

                //进行缩图
                Bitmap img = new Bitmap(towidth, toheight);
                img.SetResolution(72f, 72f);
                //img.MakeTransparent();

                Graphics gdiobj = Graphics.FromImage(img);

                gdiobj.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.Default;
                gdiobj.SmoothingMode      = System.Drawing.Drawing2D.SmoothingMode.Default;
                gdiobj.InterpolationMode  = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
                gdiobj.PixelOffsetMode    = System.Drawing.Drawing2D.PixelOffsetMode.HighQuality;
                gdiobj.FillRectangle(new SolidBrush(Color.White), 0, 0,
                                     towidth, toheight);

                Rectangle destrect = new Rectangle(0, 0,
                                                   towidth, toheight);
                gdiobj.DrawImage(originalImage, destrect, 0, 0, ow,
                                 oh, GraphicsUnit.Pixel);
                System.Drawing.Imaging.EncoderParameters ep = new System.Drawing.Imaging.EncoderParameters(1);
                ep.Param[0] = new System.Drawing.Imaging.EncoderParameter(System.Drawing.Imaging.Encoder.Quality, (long)100);
                System.Drawing.Imaging.ImageCodecInfo ici = GetEncoderInfo("image/jpeg");
                try
                {
                    if (ici != null)
                    {
                        img.Save(ms, ici, ep);
                    }
                    else
                    {
                        img.Save(ms, ConvertImageFormat(originalImagePath));
                    }
                }
                catch (System.Exception e)
                {
                    throw e;
                }
                finally
                {
                    gdiobj.Dispose();
                    img.Dispose();
                }
            }
            originalImage.Dispose();
            return(ms);
        }
        /// <summary>
        /// 导入图片到媒体库
        /// </summary>
        /// <param name="PictureUrl">图片地址</param>
        /// <returns></returns>
        public String ImportPicture(String PictureUrl)
        {
            String Picture = "";

            if (!String.IsNullOrEmpty(PictureUrl))
            {
                //查看该图片是否已经存在过
                KeyValueEntity PictureTemp = ImportPictureList.Find(r1 => r1.Key == PictureUrl);
                if (PictureTemp != null && !String.IsNullOrEmpty(PictureTemp.Key))
                {
                    Picture = PictureTemp.Value.ToString();
                }
                else
                {
                    DNNGo_DNNGalleryProGame_Files PhotoItem = new DNNGo_DNNGalleryProGame_Files();

                    //将图片的URL转换为相应的文件名,文件后缀等内容
                    PhotoItem.FileName = System.IO.Path.GetFileName(PictureUrl);//文件名 “Default.aspx”

                    if (!String.IsNullOrEmpty(PhotoItem.FileName) && PhotoItem.FileName.IndexOf(".") > 0)
                    {
                        PhotoItem.FileExtension = System.IO.Path.GetExtension(PhotoItem.FileName).Replace(".", "");
                        PhotoItem.Name          = PhotoItem.FileName.Replace(System.IO.Path.GetExtension(PictureUrl), "");

                        //判断哪些文件需要被下载
                        if (NeedExtension(PhotoItem.FileExtension))
                        {
                            String   FullFile = String.Format("{0}DNNGalleryProGame\\uploads\\{1}\\{2}\\{3}\\{4}", DNNGalleryProGame_PortalSettings.HomeDirectoryMapPath, DateTime.Now.Year, DateTime.Now.Month, DateTime.Now.Day, PhotoItem.FileName);
                            FileInfo file     = new FileInfo(FullFile);

                            int ExistsCount = 1;
                            //如果有重复的文件,需要改变文件名
                            while (file.Exists)
                            {
                                PhotoItem.FileName = String.Format("{0}_{1}.{2}", PhotoItem.Name, ExistsCount, PhotoItem.FileExtension);
                                FullFile           = String.Format("{0}DNNGalleryProGame\\uploads\\{1}\\{2}\\{3}\\{4}", DNNGalleryProGame_PortalSettings.HomeDirectoryMapPath, DateTime.Now.Year, DateTime.Now.Month, DateTime.Now.Day, PhotoItem.FileName);
                                file = new FileInfo(FullFile);
                                ExistsCount++;
                            }

                            try
                            {
                                if (!file.Directory.Exists)
                                {
                                    file.Directory.Create();
                                }

                                //下载图片
                                WebClientX web = new WebClientX();
                                web.DownloadFile(new Uri(PictureUrl), FullFile);

                                file = new FileInfo(FullFile);
                                if (file.Exists)
                                {
                                    PhotoItem.ModuleId = ModuleID;
                                    PhotoItem.PortalId = DNNGalleryProGame_PortalSettings.PortalId;
                                    PhotoItem.FileSize = Convert.ToInt32(file.Length / 1024);
                                    PhotoItem.FileMate = FileSystemUtils.GetContentType(Path.GetExtension(PhotoItem.FileName).Replace(".", ""));
                                    PhotoItem.Status   = (Int32)EnumFileStatus.Approved;
                                    PhotoItem.FilePath = String.Format("DNNGalleryProGame/uploads/{0}/{1}/{2}/{3}", DateTime.Now.Year, DateTime.Now.Month, DateTime.Now.Day, PhotoItem.FileName);


                                    try
                                    {
                                        if (("png,gif,jpg,jpeg,bmp").IndexOf(PhotoItem.FileExtension) >= 0)
                                        {
                                            //图片的流
                                            System.Drawing.Image image = System.Drawing.Image.FromFile(file.FullName);
                                            PhotoItem.ImageWidth  = image.Width;
                                            PhotoItem.ImageHeight = image.Height;

                                            PhotoItem.Exif = Common.Serialize <EXIFMetaData.Metadata>(new EXIFMetaData().GetEXIFMetaData(image));
                                        }
                                    }
                                    catch
                                    {
                                    }

                                    PhotoItem.LastTime = DateTime.Now;
                                    PhotoItem.LastIP   = WebHelper.UserHost;
                                    //PhotoItem.LastUser = DNNGalleryProGame_PortalSettings.UserInfo.UserID;
                                    PhotoItem.ID = PhotoItem.Insert();

                                    //返回图片的路径
                                    Picture = String.Format("MediaID={0}", PhotoItem.ID);
                                    ImportPictureList.Add(new KeyValueEntity(PictureUrl, Picture));
                                }
                            }
                            catch (Exception ex)
                            {
                            }
                        }
                        else
                        {
                            Picture = PictureUrl;
                        }
                    }
                    else
                    {
                        Picture = PictureUrl;
                    }
                }
            }


            return(Picture);
        }