生成二维码

 

首先添加ThoughtWorks.QRCode.dll

public class Class1
    {
        /// <summary>
        /// 生成二维码.
        /// </summary>
        /// <param name="data">需要添加进去的文本</param>
        /// <returns></returns>
        public static 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;
        }

}

 

 

前台调用：

 

protected void SaveQr_Click(object sender, EventArgs e)
        {
            StringBuilder sb = new StringBuilder();
            sb.Append(txtname.Value + "</br>");
            sb.Append(txtcode.Value + "</br>");
            //Bitmap bitmap = QRCodeOp.QRCodeEncoderUtil((sb.ToString().Trim()));//调用二维码编码方法生成位图  
            string fileName1 = Server.MapPath("~") + "Images\\QRImages\\" + txtname.Value + ".jpg";
           // bitmap.Save(fileName);//保存位图，文件名为个人身份证号  
           //Response.Write( QRCodeOp.QRCodeDecoderUtil(bitmap));
            System.Drawing.Image bitmap=Class1.GCode(sb.ToString());
            string fileName = Server.MapPath("~") + "Images\\QRImages\\ico-1.png";//中间带图片，图片先找好的，和生成的二维码合并
            Class1.CombinImage(bitmap, fileName).Save(fileName1);
        }