Nuget安装ZXing.Net,帮助类:
using System; using System.Collections.Generic; using System.Drawing; using System.Drawing.Imaging; using ZXing; using ZXing.Common; using ZXing.QrCode; using ZXing.QrCode.Internal; namespace CommonHelper { 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; } } }
使用:保存为文件流
public ActionResult GenerateBarCode(string contents) { MemoryStream ms = new MemoryStream(); Bitmap bitmap = BarcodeHelper.Generate2(contents, 270, 50); Graphics g = Graphics.FromImage(bitmap); bitmap.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg); g.Dispose(); bitmap.Dispose(); return File(ms.ToArray(), "image/jpeg"); }
保存为文件:
/// <summary> /// 生成条形码 /// </summary> /// <param name="code"></param> /// <returns></returns> public static string GenerateBarCode(string contents) { string fileName = AppDomain.CurrentDomain.BaseDirectory + "BarCode\\" + Guid.NewGuid().ToString() + ".jpg"; fileName = fileName.Replace("\\bin\\Debug", ""); MemoryStream ms = new MemoryStream(); Bitmap bitmap = BarcodeHelper2.Generate2(contents, 270, 50); Graphics g = Graphics.FromImage(bitmap); bitmap.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg); g.Dispose(); bitmap.Dispose(); using (FileStream fs = new FileStream(fileName, FileMode.OpenOrCreate, FileAccess.Write)) { byte[] buffer = ms.ToArray();//转化为byte格式存储 fs.Write(buffer, 0, buffer.Length); fs.Flush(); buffer = null; } return fileName; }
MVC页面:
<img src='/Home/GenerateBarCode?proCode=xxx' />
参考:https://www.cnblogs.com/hsiang/p/8452984.html