C#使用QRCode生成海报图并嵌入定位带logo的二维码

using QRCoder;
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Imaging;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
 
namespace QRCoder_img
{
    class Program
    {
        static void Main(string[] args)
        {
           
                //业务场景：本次是通过一个表单带上市场部员工id
                //生成二维码，并定位到海报模板上，随后绑定到该
                //员工，此刻该员工就拥有自己的推广二维码
                //假设 员工id ，真实业务场景应从库中抓取未生成二维码的员工id,定时作业执行。
                var id = 1;
                // 要生成的二维码链接
                var url="http://baidu.com?id="+id;
                //生成的二维码路径
                string ewm = "";
                //生成二维码，并返回路径
                RenderQrCode(url, id, ref ewm);
                //定位生成新的图
                Image img = Image.FromFile(ewm);
                Image imgBack = Image.FromFile(System.IO.Directory.GetCurrentDirectory() + "/dingwei/1.png");
                Bitmap bmp = CombinImage(270, 270, imgBack, img, 227, 668);
            //最终生成图的路径，可在此之后同步数据库，或者其他不同形式业务
                string str = System.IO.Directory.GetCurrentDirectory() + "/new/1tg1.png";
                if (System.IO.File.Exists(str))
                    System.IO.File.Delete(str);
                bmp.Save(str, ImageFormat.Png);
                bmp.Clone();
                bmp.Dispose();
                img.Dispose();
                System.IO.File.Delete(ewm);
            
 
        }
 
        /// <summary>
        /// 生成带有logo的二维码
        /// </summary>
        /// <param name="url">二维码链接</param>
        /// <param name="id">市场部用户id,也作为生成图的名字标识</param>
        /// <param name="ewm">生成图的路径</param>
        public static void RenderQrCode(string url, int id, ref string ewm)
        {
            string level = "L";
            QRCodeGenerator.ECCLevel eccLevel = (QRCodeGenerator.ECCLevel)(level == "L" ? 0 : level == "M" ? 1 : level == "Q" ? 2 : 3);
            QRCodeGenerator qrGenerator = new QRCodeGenerator();
            QRCodeData qrCodeData = qrGenerator.CreateQrCode(url, eccLevel);
            QRCode qrCode = new QRCode(qrCodeData);
            var imageewm = qrCode.GetGraphic(20, Color.Black, Color.White,
            GetIconBitmap(System.IO.Directory.GetCurrentDirectory() + "/logo/appicon.png"));
            string str = System.IO.Directory.GetCurrentDirectory() + "/user/user" + id + ".jpg";
            if (System.IO.File.Exists(str))
                System.IO.File.Delete(str);
            imageewm.Save(str, ImageFormat.Jpeg);
            imageewm.Clone();
            imageewm.Dispose();
            qrCode.Dispose();
            qrCodeData.Dispose();
            ewm = str;
        }
 
        public static Bitmap GetIconBitmap(string url)
        {
            Bitmap img = null;
            if (url.Length > 0)
            {
                try
                {
                    img = new Bitmap(url);
                }
                catch (Exception)
                {
                }
            }
            return img;
        }
        /// <summary>
        /// 两张图合并
        /// </summary>
        /// <param name="width">二维码绘画大小</param>
        /// <param name="height">二维码绘画大小</param>
        /// <param name="imgBack">模板图</param>
        /// <param name="img">二维码图</param>
        /// <param name="xDeviation">定位x</param>
        /// <param name="yDeviation">定位Y</param>
        /// <returns></returns>
        public static Bitmap CombinImage(int width, int height, Image imgBack, Image img, int xDeviation = 0, int yDeviation = 0)
        {
            Bitmap bmp = new Bitmap(imgBack.Width, imgBack.Height);
            Graphics g = Graphics.FromImage(bmp);
            g.Clear(Color.White);
            g.DrawImage(imgBack, 0, 0, imgBack.Width, imgBack.Height);
            g.DrawImage(img, xDeviation, yDeviation, width, height);
            GC.Collect();
            g.Dispose();
            return bmp;
        }
      
    }
}