.NET 產生產生縮圖

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 /// <summary>        /// 產生縮圖        /// </summary>        /// <param name="FromImagePath">源圖路徑(絕對路徑)</param>        /// <param name="ToImagePath">縮圖路徑(絕對路徑)</param>        /// <param name="MaxWidth">最大寬度</param>        /// <param name="MaxHeight">最大高度</param>        public static void CreatePic(string FromImagePath, string ToImagePath, double MaxWidth, double MaxHeight)        {            Bitmap tmp = null;            Graphics g = null;            //double Max_width = 110, Max_height = 110;//假設最大寬度以及最大高度            int Width = 0;//框條和卡紙的寬度            int Height = 0;//框條和卡紙的高度            double wmp = 1, hmp = 1, default_pparm = 1;//預設寬的比例，預設高對應的比例，最大寬度比例，最大高度比例，預設實際比例，最大實際比例            System.Drawing.Image imgPic = null;//畫芯            imgPic = System.Drawing.Image.FromFile(FromImagePath);            Width = imgPic.Width;            Height = imgPic.Height;            wmp = MaxWidth / Width;//最大寬度比例            hmp = MaxHeight / Height;//最大高度比例            default_pparm = wmp < hmp ? wmp : hmp;//預設實際比例            if (default_pparm > 1)            {                default_pparm = 1;            }            Width = (int)(Width * default_pparm);            Height = (int)(Height * default_pparm);            tmp = new Bitmap((int)(Width), (int)(Height));//最大的容器            g = Graphics.FromImage(tmp);            //g.FillRectangle(new SolidBrush(Color.White), new Rectangle(0, 0, tmp.Width, tmp.Height));            Rectangle Boxs = new Rectangle(0, 0, imgPic.Width, imgPic.Height);            Rectangle Boxd = new Rectangle(0, 0,                                           (int)(Width), (int)(Height));//算圖的起點            g.DrawImage(imgPic, Boxd, Boxs, GraphicsUnit.Pixel);            tmp.Save(ToImagePath, ImageFormat.Jpeg);        }

 

.NET 產生產生縮圖