C#利用ZXing.Net生成条形码，二维码和带Logo的二维码

本文是利用ZXing.Net在WinForm中生成条形码，二维码的小例子，仅供学习分享使用，如有不足之处，还请指正。

什么是ZXing.Net?

ZXing是一个开放源码的，用Java实现的多种格式的1D/2D条码图像处理库，它包含了联系到其他语言的端口。而ZXing.Net是ZXing的端口之一。

在工程中引用ZXing.Net

在项目中，点击项目名称右键-->管理NuGet程序包，打开NuGet包管理器窗口，进行搜索下载即可，如下图所示：

涉及知识点：

BarcodeWriter 用于生成图片格式的条码类，通过Write函数进行输出。继承关系如上图所示。

BarcodeFormat 枚举类型，条码格式

QrCodeEncodingOptions 二维码设置选项，继承于EncodingOptions，主要设置宽，高，编码方式等信息。

MultiFormatWriter 复合格式条码写码器，通过encode方法得到BitMatrix。

BitMatrix 表示按位表示的二维矩阵数组，元素的值用true和false表示二进制中的1和0。

示例效果图

关键代码

如下所示，包含一维条码，二维条码，和带logo的条码

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/// </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,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;}}
}

关于生成条形码和二维码的方式有很多，条码的种类也有很多种，每一种都有其对应的应用领域。

原文：http://www.cnblogs.com/hsiang/p/8452984.html

网络资源：

https://www.cnblogs.com/hhhh2010/p/4088236.html

https://blog.csdn.net/3150379/article/details/44872075

http://blog.csdn.net/nodbrag/article/details/12438411

http://www.cnblogs.com/xuhang/p/3831776.html

http://www.cnblogs.com/xuhang/p/3832118.html

http://www.cnblogs.com/rophie/archive/2012/03/02/2376946.html

http://www.cnblogs.com/mzlee/archive/2011/03/19/Lee_Barcode.html

http://www.cnblogs.com/Soar1991/archive/2012/03/30/2426115.html

http://www.cnblogs.com/lykbk/p/3818863.html （asp.net例子）

http://www.cnblogs.com/freeliver54/p/3430956.html（图片存储转换）

https://blog.csdn.net/yzj_xiaoyue/article/details/73330535