使用Zxing生成一维码和二维码

首先引用zxing.dll 到项目中引用

using System;

using System.Collections.Generic;

using System.Drawing;

using System.Drawing.Imaging;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using ZXing;

using ZXing.Common;

using ZXing.QrCode;

using ZXing.QrCode.Internal;

namespace DemoQrCode

{

    /// <summary>

    /// 描述：条形码和二维码帮助类

    /// 时间：2018-02-18

    /// </summary>

    public class BarcodeHelper

    {

       /// <summary>

       /// 生成二维码

       /// </summary>

       /// <param name="text">内容</param>

       /// <param name="width">宽度</param>

       /// <param name="height">高度</param>

       /// <returns></returns>

        public static Bitmap Generate1(string text,int width,int height)

        {

            BarcodeWriter writer = new BarcodeWriter();

            writer.Format = BarcodeFormat.QR_CODE;

            QrCodeEncodingOptions options = new QrCodeEncodingOptions()

            {

                DisableECI = true,//设置内容编码

                CharacterSet = "UTF-8",  //设置二维码的宽度和高度

                Width = width,

                Height = height,

                Margin = 1//设置二维码的边距,单位不是固定像素

            };

            writer.Options = options;

            Bitmap map = writer.Write(text);

            return map;

        }

        /// <summary>

        /// 生成一维条形码

        /// </summary>

        /// <param name="text">内容</param>

        /// <param name="width">宽度</param>

        /// <param name="height">高度</param>

        /// <returns></returns>

        public static Bitmap Generate2(string text,int width,int height)

        {

            BarcodeWriter writer = new BarcodeWriter();

            //使用ITF 格式，不能被现在常用的支付宝、微信扫出来

            //如果想生成可识别的可以使用 CODE_128 格式

            //writer.Format = BarcodeFormat.ITF;

            writer.Format = BarcodeFormat.CODE_39;

            EncodingOptions options = new EncodingOptions()

            {

                Width = width,  //这里的宽度和高度 尽量设置大些，要不会报错 超出索引值 270,50

                Height = height,

                Margin = 2

            };

            writer.Options = options;

            Bitmap map = writer.Write(text);

            return map;

        }

        /// <summary>

        /// 生成带Logo的二维码

        /// </summary>

        /// <param name="text">内容</param>

        /// <param name="width">宽度</param>

        /// <param name="height">高度</param>

        public static Bitmap Generate3(string text, int width, int height)

        {

            //Logo 图片

            string logoPath = System.AppDomain.CurrentDomain.BaseDirectory + @"\img\logo.png";

            Bitmap logo = new Bitmap(logoPath);

            //构造二维码写码器

            MultiFormatWriter writer = new MultiFormatWriter();

            Dictionary<EncodeHintType, object> hint = new Dictionary<EncodeHintType, object>();

            hint.Add(EncodeHintType.CHARACTER_SET, "UTF-8");

            hint.Add(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);

            //hint.Add(EncodeHintType.MARGIN, 2);//旧版本不起作用，需要手动去除白边

            //生成二维码

            BitMatrix bm = writer.encode(text, BarcodeFormat.QR_CODE, width+30, height+30, hint);

            bm = deleteWhite(bm);

            BarcodeWriter barcodeWriter = new BarcodeWriter();

            Bitmap map = barcodeWriter.Write(bm);

            //获取二维码实际尺寸（去掉二维码两边空白后的实际尺寸）

            int[] rectangle = bm.getEnclosingRectangle();

            //计算插入图片的大小和位置

            int middleW = Math.Min((int)(rectangle[2] / 3), logo.Width);

            int middleH = Math.Min((int)(rectangle[3] / 3), logo.Height);

            int middleL = (map.Width - middleW) / 2;

            int middleT = (map.Height - middleH) / 2;

            Bitmap bmpimg = new Bitmap(map.Width, map.Height, PixelFormat.Format32bppArgb);

            using (Graphics g = Graphics.FromImage(bmpimg))

            {

                g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;

                g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;

                g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;

                g.DrawImage(map, 0, 0,width,height);

                //白底将二维码插入图片

                g.FillRectangle(Brushes.White, middleL, middleT, middleW, middleH);

                g.DrawImage(logo, middleL, middleT, middleW, middleH);

            }

            return bmpimg;

        }

        /// <summary>

        /// 删除默认对应的空白

        /// </summary>

        /// <param name="matrix"></param>

        /// <returns></returns>

        private static BitMatrix deleteWhite(BitMatrix matrix)

        {

            int[] rec = matrix.getEnclosingRectangle();

            int resWidth = rec[2] + 1;

            int resHeight = rec[3] + 1;

            BitMatrix resMatrix = new BitMatrix(resWidth, resHeight);

            resMatrix.clear();

            for (int i = 0; i < resWidth; i++)

            {

                for (int j = 0; j < resHeight; j++)

                {

                    if (matrix[i + rec[0], j + rec[1]])

                        resMatrix[i, j]=true;

                }

            }

            return resMatrix;

        }

    }

}