private static void MakeThumbnail(string sourcePath, string newPath, int width, int height)
        {
            System.Drawing.Image ig = System.Drawing.Image.FromFile(sourcePath);
            int towidth = width;
            int toheight = height;
            int x = 0;
            int y = 0;
            int ow = ig.Width;
            int oh = ig.Height;
            //判斷圖片的寬和高的比例
            if ((double)ig.Width / (double)ig.Height > (double)towidth / (double)toheight)
            {
                oh = ig.Height;
                ow = ig.Height * towidth / toheight;
                y = 0;
                x = (ig.Width - ow) / 2;

            }
            else
            {
                ow = ig.Width;
                oh = ig.Width * height / towidth;
                x = 0;
                y = (ig.Height - oh) / 2;
            }
            //進行等比縮放
            System.Drawing.Image bitmap = new System.Drawing.Bitmap(towidth, toheight);
            System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitmap);
            g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
            g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
            g.Clear(System.Drawing.Color.Transparent);
            g.DrawImage(ig, new System.Drawing.Rectangle(0, 0, towidth, toheight), new System.Drawing.Rectangle(x, y, ow, oh), System.Drawing.GraphicsUnit.Pixel);
            //調(diào)用Save方法將生成的縮略圖保存到newPath目錄下
            try
            {
                bitmap.Save(newPath, System.Drawing.Imaging.ImageFormat.Jpeg);
            }
            catch (Exception ex)
            {
                throw ex;
            }
            finally
            {
                ig.Dispose();
                bitmap.Dispose();
                g.Dispose();
            }
        }

標簽： isp

版權(quán)申明：本站文章部分自網(wǎng)絡(luò)，如有侵權(quán)，請聯(lián)系：west999com@outlook.com
特別注意：本站所有轉(zhuǎn)載文章言論不代表本站觀點！
本站所提供的圖片等素材，版權(quán)歸原作者所有，如需使用，請與原作者聯(lián)系。