仿微信二维码生成代码,CSharp代码库,德仔网

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【CSharp】仿微信二维码生成
作者:Dezai.CN / 发布于2012/11/27/ 2188
/// <summary>
        /// 生成二维码.
        /// </summary>
        /// <param name="data">需要添加进去的文本</param>
        /// <returns></returns>
        public System.Drawing.Image GCode(String data)
        {
            QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();
            qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;

            qrCodeEncoder.QRCodeScale = 5;
            qrCodeEncoder.QRCodeVersion = 7;

            qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.L;
            var pbImg = qrCodeEncoder.Encode(data, System.Text.Encoding.UTF8);
            var width = pbImg.Width / 10;
            var dwidth = width * 2;
            Bitmap bmp = new Bitmap(pbImg.Width + dwidth, pbImg.Height + dwidth);
            Graphics g = Graphics.FromImage(bmp);
            var c = System.Drawing.Color.White;
            g.FillRectangle(new SolidBrush(c), 0, 0, pbImg.Width + dwidth, pbImg.Height + dwidth);
            g.DrawImage(pbImg, width, width);
            g.Dispose();
            return bmp;
        }

        /// <summary>
        /// 调用此函数后使此两种图片合并，类似相册，有个
        /// 背景图，中间贴自己的目标图片
        /// </summary>
        /// <param name="sourceImg">粘贴的源图片</param>
        /// <param name="destImg">粘贴的目标图片</param>
        public static System.Drawing.Image CombinImage(System.Drawing.Image imgBack, string destImg)
        {

            System.Drawing.Image img = System.Drawing.Image.FromFile(destImg);        //照片图片  
            if (img.Height != 50 || img.Width != 50) {
                img = KiResizeImage(img, 50, 50, 0);
            }
            Graphics g = Graphics.FromImage(imgBack);

            g.DrawImage(imgBack, 0, 0, imgBack.Width, imgBack.Height);      //g.DrawImage(imgBack, 0, 0, 相框宽, 相框高); 

            //g.FillRectangle(System.Drawing.Brushes.White, imgBack.Width / 2 - img.Width / 2 - 1, imgBack.Width / 2 - img.Width / 2 - 1,1,1);//相片四周刷一层黑色边框

            //g.DrawImage(img, 照片与相框的左边距, 照片与相框的上边距, 照片宽, 照片高);

            g.DrawImage(img, imgBack.Width / 2 - img.Width / 2, imgBack.Width / 2 - img.Width / 2 , img.Width, img.Height);
            GC.Collect();
            return imgBack;
        }

        /// <summary>
        /// Resize图片
        /// </summary>
        /// <param name="bmp">原始Bitmap</param>
        /// <param name="newW">新的宽度</param>
        /// <param name="newH">新的高度</param>
        /// <param name="Mode">保留着，暂时未用</param>
        /// <returns>处理以后的图片</returns>
        public static System.Drawing.Image KiResizeImage(System.Drawing.Image bmp, int newW, int newH, int Mode)
        {
            try
            {
                System.Drawing.Image b = new Bitmap(newW, newH);
                Graphics g = Graphics.FromImage(b);
 
                // 插值算法的质量
                g.InterpolationMode = InterpolationMode.HighQualityBicubic;

                g.DrawImage(bmp, new Rectangle(0, 0, newW, newH), new Rectangle(0, 0, bmp.Width, bmp.Height), GraphicsUnit.Pixel);
                g.Dispose();

                return b;
            }
            catch
            {
                return null;
            }
        }
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