ZXing.Net 的Core平台生成二维码

一、引用

二、代码

帮助类

/// <summary>/// ZXing.NET 二维码帮助类/// </summary>public class ZXingHelper{/// <summary>/// 站点二维码的目录/// </summary>private static string QRCodeDirectory = "QRCode";/// <summary>/// 使用zxing动态库生成二维码/// </summary>/// <param name="conetnt">二维码内容</param>/// <param name="logoPath">logo图片路径，默认为空。为空时生成的二维码不带logo</param>/// <param name="height">二维码图片高度，默认240 单位 pixels</param>/// <param name="width">二维码图片宽度，默认240 单位 pixels</param>/// <param name="margin">二维码图片边距，默认为0</param>/// <returns></returns>public static System.DrawingCore.Bitmap GenerateQRCode(string conetnt, string logoPath = "", int height = 240, int width = 240, int margin = 0){try{BarcodeWriter barCodeWriter = new BarcodeWriter();barCodeWriter.Format = BarcodeFormat.QR_CODE;barCodeWriter.Options.Hints.Add(EncodeHintType.CHARACTER_SET, "UTF-8");barCodeWriter.Options.Hints.Add(EncodeHintType.ERROR_CORRECTION, ZXing.QrCode.Internal.ErrorCorrectionLevel.H);barCodeWriter.Options.Height = height;barCodeWriter.Options.Width = width;barCodeWriter.Options.Margin = margin;BitMatrix bm = barCodeWriter.Encode(conetnt);System.DrawingCore.Bitmap qrCodeImage = barCodeWriter.Write(bm);if (!string.IsNullOrEmpty(logoPath)){// 添加LogoSystem.DrawingCore.Bitmap logo = new System.DrawingCore.Bitmap(logoPath);int logoSize = (int)(qrCodeImage.Width * 0.2); // Logo大小为二维码大小的1/5int logoX = (qrCodeImage.Width - logoSize) / 2;int logoY = (qrCodeImage.Height - logoSize) / 2;System.DrawingCore.Graphics qrGraphics = System.DrawingCore.Graphics.FromImage(qrCodeImage);qrGraphics.DrawImage(logo, new System.DrawingCore.Rectangle(logoX, logoY, logoSize, logoSize));}return qrCodeImage;}catch (Exception ex){return null;}}/// <summary>///生成二维码/// </summary>/// <param name="message"></param>/// <param name="width"></param>/// <param name="height"></param>/// <returns></returns>public static byte[] Create(string message, int width = 600, int height = 600){try{int heig = width;if (width > height){heig = height;width = height;}if (string.IsNullOrWhiteSpace(message)){return null;}var w = new QRCodeWriter();BitMatrix b = w.encode(message, BarcodeFormat.QR_CODE, width, heig);var zzb = new BarcodeWriter();zzb.Options = new EncodingOptions(){Margin = 0,};var  b2 = zzb.Write(b);byte[] bytes = BitmapToArray(b2);return bytes;}catch (Exception ex){return null;}}/// <summary>/// 将Bitmap  写为byte[]的方法/// </summary>/// <param name="bmp"></param>/// <returns></returns>public static byte[] BitmapToArray(System.DrawingCore.Bitmap bmp){byte[] byteArray = null;using (MemoryStream stream = new MemoryStream()){bmp.Save(stream, ImageFormat.Png);byteArray = stream.GetBuffer();}return byteArray;}}

调用

/// <summary>/// 获取二维码/// </summary>/// <param name="qrUrl"></param>/// <returns></returns>public byte[] GetQrCode(string qrUrl){System.DrawingCore.Bitmap qrImage = null;if (!System.IO.File.Exists(QRCodeLogoPath)){qrImage = ZXingHelper.GenerateQRCode(qrUrl);}else{qrImage = ZXingHelper.GenerateQRCode(qrUrl, QRCodeLogoPath);}MemoryStream ms = new MemoryStream();qrImage.Save(ms, System.DrawingCore.Imaging.ImageFormat.Bmp);byte[] bytes = ms.GetBuffer();ms.Close();//return ZXingHelper.Create(qrUrl);return bytes;}