C#使用ZXing实现二维码和条形码的生成
作者:SongYuLong的博客
这篇文章主要为大家详细介绍了C#如何使用ZXing实现二维码和条形码的生成与识别,文中的示例代码讲解详细,感兴趣的小伙伴可以跟随小编一起学习一下
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; }
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