利用 ZXing 生成二維碼

/// <summary> /// 描述：條形碼和二維碼幫助類 /// 時間：2018-02-18 /// </summary> public class BarcodeHelper { /// <summary> /// 生成二維碼 /// </summary> /// <param name="text">內容</param> /// <param name="width">寬度</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,//設置內容編碼 CharacterSet = "UTF-8", //設置二維碼的寬度和高度 Width = width, Height = height, Margin = 1//設置二維碼的邊距,單位不是固定像素 }; writer.Options = options; Bitmap map = writer.Write(text); return map; } /// <summary> /// 生成一維條形碼 /// </summary> /// <param name="text">內容</param> /// <param name="width">寬度</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，不能被現在常用的支付寶、微信掃出來 //如果想生成可識別的可以使用 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> /// 生成帶Logo的二維碼 /// </summary> /// <param name="text">內容</param> /// <param name="width">寬度</param> /// <param name="height">高度</param> public static Bitmap Generate3(string text, int width, int height) { //Logo 圖片 string logoPath = System.AppDomain.CurrentDomain.BaseDirectory + @"\img\logo.png"; Bitmap logo = new Bitmap(logoPath); //構造二維碼寫碼器 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);//舊版本不起作用，需要手動去除白邊 //生成二維碼 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); //獲取二維碼實際尺寸（去掉二維碼兩邊空白後的實際尺寸） int[] rectangle = bm.getEnclosingRectangle(); //計算插入圖片的大小和位置 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); //白底將二維碼插入圖片 g.FillRectangle(Brushes.White, middleL, middleT, middleW, middleH); g.DrawImage(logo, middleL, middleT, middleW, middleH); } return bmpimg; } /// <summary> /// 刪除默認對應的空白 /// </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; } }