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。
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:
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。
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
{
///
/// 描述:条形码和二维码帮助类
///
public class BarcodeHelper
{
///
/// 生成二维码
///
/// 内容
/// 宽度
/// 高度
///
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;
}
///
/// 生成一维条形码
///
/// 内容
/// 宽度
/// 高度
///
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;
}
///
/// 生成带Logo的二维码
///
/// 内容
/// 宽度
/// 高度
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 hint = new Dictionary();
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;
}
///
/// 删除默认对应的空白
///
///
///
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