C# ZXing 二维码，条形码生成与识别

安装ZXing

NuGet搜索ZXing安装ZXing.Net包

使用ZXing

using ZXing;
using ZXing.Common;
using ZXing.QrCode;
using ZXing.QrCode.Internal;

生成条形码

/// <summary>
/// 生成条形码
/// </summary>
/// <param name="text"></param>
static void GenerateBarCode(string text)
{ BarcodeWriter writer = new BarcodeWriter();writer.Format = BarcodeFormat.CODE_128;EncodingOptions options = new EncodingOptions(){Width = 150,Height = 50,Margin = 2,};writer.Options = options;Bitmap map = writer.Write(text);string filename = @"D:\2.png";map.Save(filename, ImageFormat.Png);map.Dispose();
}

生成二维码

 /// <summary>/// 生成二维码/// </summary>/// <param name="text"></param>static void GenerateQRCode(string text){BarcodeWriter writer = new BarcodeWriter();writer.Format = BarcodeFormat.QR_CODE;QrCodeEncodingOptions options = new QrCodeEncodingOptions();options.DisableECI = true;// 设置内容字符编码options.CharacterSet = "UTF-8";// 设置二维码的宽度高度options.Width = 200;options.Height = 200;// 设置二维码的边距，单位不是固定像素options.Margin = 1;writer.Options = options;Bitmap map = writer.Write(text);string filename = @"D:\1.png";map.Save(filename, ImageFormat.Png);map.Dispose();}

生成带Logo的二维码

/// <summary>
/// 生成带Logo图片的二维码
/// </summary>
/// <param name="text"></param>
static void GenerateQRCodeWithLoge(string text) 
{// Logo 图片Bitmap logo = new Bitmap(@"D:\logo.png");// 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);// 生成二维码BitMatrix bm = writer.encode(text, BarcodeFormat.QR_CODE, 300, 300, hint);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logo图片的大小位置int middleW = Math.Min((int)(rectangle[2] / 3.5), logo.Width);int middleH = Math.Min((int)(rectangle[3] / 3.5), logo.Height);int middleL = (map.Width - middleW) / 2;int middleT = (map.Width - middleH) / 2;// 将img转换成bmp格式，否则后面无法创建Graphics对象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);}// 将二维码插入图片Graphics myGraphics = Graphics.FromImage(bmpimg);// 白底myGraphics.FillRectangle(Brushes.White, middleL, middleT, middleW, middleH);myGraphics.DrawImage(logo, middleL, middleT, middleW, middleH);// 保存生成图片bmpimg.Save(@"D:\logo_qrcode.png", ImageFormat.Png);}

识别二维码、条形码

/// <summary>
/// 识别二维码、条形码
/// </summary>
/// <param name="filename"></param>
/// <returns></returns>
static string ReadBarCode(string filename)
{ BarcodeReader reader = new BarcodeReader();reader.Options.CharacterSet = "UTF-8";Bitmap map = new Bitmap(filename);Result result = reader.Decode(map);map.Dispose();return result == null ? "" : result.Text;
}