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 /// <summary>        ///  給圖片加浮水印(圖片置中)        /// </summary>        /// <param name="srcImgPath">原始圖片路徑</param>        /// <param name="waterPath">浮水印圖片路徑</param>        /// <param name="waterWidth">浮水印地區的寬度</param>        /// <param name="waterHeight">浮水印地區的高度</param>        /// <param name="waterString">浮水印字元</param>        /// <param name="markPosition">浮水印的位置</param>         public static void MakeWaterPic(string srcImgPath, string waterPath, int waterWidth, int waterHeight, string waterString, string markPosition = "圖片中間")        {            //1. 從原圖片建立 Image 對象             using (Image img = Image.FromFile(srcImgPath))            {                //2.用指定的大小和格式初始化 Bitmap 類的新執行個體                 using (Bitmap map = new Bitmap(img.Width, img.Height, PixelFormat.Format32bppArgb))                {                    //3.從指定的 Image 對象建立新 Graphics 對象                     using (Graphics g = Graphics.FromImage(map))                    {                        //4.在指定位置並且按指定大小繪製 原圖片 對象                         g.DrawImage(img, new Rectangle(0, 0, img.Width, img.Height), new RectangleF(0, 0, img.Width, img.Height), GraphicsUnit.Pixel);                        //g.DrawImage(map2,new Rectangle(0, 0, map2.Width, map2.Height));                        // 設定浮水印字型                        int fHeight = img.Height / 5;                        if (fHeight > 16) fHeight = 16;                        Font drawFont = new Font("Arial", fHeight);                        // 設定浮水印文字位置                         int disX = 0, disY = 0;                        if (markPosition == "圖片中間")                        {                            disX = (img.Width - waterWidth) / 2;                            disY = (img.Height - waterHeight) / 2;                        }                        StringFormat drawFormat = new StringFormat();                        drawFormat.FormatFlags = StringFormatFlags.NoWrap;                        //文本置中顯示                        drawFormat.Alignment = StringAlignment.Center;                        drawFormat.LineAlignment = StringAlignment.Center;                        SolidBrush drawBrush = new SolidBrush(Color.White);                        //填充矩形                        g.FillRectangle(drawBrush, new Rectangle(disX, disY, waterWidth, waterHeight));                        drawBrush.Color = Color.Black;                        g.DrawString(waterString, drawFont, drawBrush, new RectangleF(disX, disY, waterWidth, waterHeight), drawFormat);                        map.Save(waterPath, ImageFormat.Jpeg);                    }                }            }        }

　　

二維碼名片