c# 二维码绘图及打印

nuget 下载 zxing.dll

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Printing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using ZXing;
using ZXing.Common;
using ZXing.QrCode;

namespace despyPro.BarCode
{
    public class BarCodeHelper
    {
        private static Bitmap CreateQRCode(string ssno)
        {
            EncodingOptions options = new QrCodeEncodingOptions
            {
                DisableECI = true,
                CharacterSet = "UTF-8",
                Width = 120,
                Height = 120
            };

            BarcodeWriter writer = new BarcodeWriter();
            writer.Format = BarcodeFormat.QR_CODE;
            writer.Options = options;
            return writer.Write(ssno);
        }

        public static void GetPrintPicture(PrintInfo  printInfo, Graphics g)
        {
            int height = 5;
            Font font = new Font("宋体", 10f);
            Brush brush = new SolidBrush(Color.Black);
            g.SmoothingMode = SmoothingMode.HighQuality;
            int pointX = 5;
            height += 8;

            RectangleF layoutRectangle = new RectangleF(pointX, height, 230f, 85f);
            g.DrawString(printInfo.Context, font, brush, layoutRectangle);

            var image = CreateQRCode(printInfo.Sno);
            Rectangle destRect = new Rectangle(-12, 15 + height, image.Width, image.Height);
            g.DrawImage(image, destRect, 0, 0, image.Width, image.Height, GraphicsUnit.Pixel);
        }

        public static void GetPicture(PrintInfo printInfo, Graphics g)
        {
            int height = 5;
            Font font = new Font("宋体", 10f);
            Brush brush = new SolidBrush(Color.Black);
            g.SmoothingMode = SmoothingMode.HighQuality;
            int pointX = 5;
            height += 8;

            RectangleF layoutRectangle = new RectangleF(pointX, height, 230f, 85f);
            g.DrawString(printInfo.Context, font, brush, layoutRectangle);

            var image = CreateQRCode(printInfo.Sno);
            Rectangle destRect = new Rectangle(-12, 15 + height, image.Width, image.Height);
            g.DrawImage(image, destRect, 0, 0, image.Width, image.Height, GraphicsUnit.Pixel);
        }

        public class PrintInfo
        {
            /// <summary>
            /// 文本框信息
            /// </summary>
            public string Context { get; set; }

            /// <summary>
            /// 新增的码
            /// </summary>
            public string Sno { get; set; } = "0000000000000000000000000400120202104131100000000000000000000000";
        }
    }
}

//二次绘图时候会与首次图片重叠
例如:

 var drawer = pictureBox1.CreateGraphics();
 //将颜色设置为white即可
 drawer.Clear(Color.White)；