在C#中直接引用ThoughtWorks.QRCode.dll 類,
android
ThoughtWorks.QRCode.Codec.QRCodeEncoder encoder = new QRCodeEncoder(); encoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;//編碼方式(注意:BYTE能支持中文,ALPHA_NUMERIC掃描出來的都是數字) encoder.QRCodeScale = 4;//大小(值越大生成的二維碼圖片像素越高) encoder.QRCodeVersion = 0;//版本(注意:設置爲0主要是防止編碼的字符串太長時發生錯誤) encoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;//錯誤效驗、錯誤更正(有4個等級) String qrdata = "二維碼信息"; System.Drawing.Bitmap bp = encoder.Encode(qrdata.ToString(), Encoding.GetEncoding("GB2312")); Image image = bp; pictureBox1.Image = bp; 保存二維碼圖片: SaveFileDialog sf = new SaveFileDialog(); sf.Title = "選擇保存文件位置"; sf.Filter = "保存圖片(*.jpg) |*.jpg|全部文件(*.*) |*.*"; //設置默認文件類型顯示順序 sf.FilterIndex = 1; //保存對話框是否記憶上次打開的目錄 sf.RestoreDirectory = true; if (sf.ShowDialog() == DialogResult.OK) { Image im = this.pictureBox1.Image; //得到文件路徑 string localFilePath = sf.FileName.ToString(); if (sf.FileName != "") { string fileNameExt = localFilePath.Substring(localFilePath.LastIndexOf("\\") + 1);//獲取文件名,不帶路徑 // newFileName = fileNameExt+DateTime.Now.ToString("yyyyMMdd") ;//給文件名後加上時間 string FilePath = localFilePath.Substring(0, localFilePath.LastIndexOf(".")); //獲取文件路徑,帶文件名,不帶後綴 string fn = sf.FileName; pictureBox1.Image.Save(FilePath +"-"+ DateTime.Now.ToString("yyyyMMdd") + ".jpg"); } } //解析二維碼信息 // QRCodeDecoder decoder = new QRCodeDecoder(); // String decodedString = decoder.decode(new QRCodeBitmapImage(new Bitmap(pictureBox1.Image))); //this.label3.Text = decodedString; 二、另外一種方法,引用ZXing類庫。 ZXing是一個開源Java類庫用於解析多種格式的1D/2D條形碼。目標是可以對QR編碼、Data Matrix、UPC的1D條形碼進行解碼。於此同時,它一樣提供 cpp,ActionScript,android,iPhone,rim,j2me,j2se,jruby,C#等方式的類庫。zxing類庫的做用主 要是解碼,是目前開源類庫中解碼能力比較強的(商業的另說,不過對於動輒成千上萬的類庫受權費用,的確很值)。 到谷歌code下載相應的代碼 1.下載zxing最新的包 到zxing的主頁: http://code.google.com/p/zxing/ 找到其中的CSharp文件夾,在vs中打開並編譯,將obj下debug中的zxing.dll複製並粘帖到你的項目中的bin文件目錄下, 右擊添加項目引用。將zxing.dll引用到項目中,就能夠在須要的地方使用了。 源代碼中有兩處UTF-8的問題,會致使中文出現亂碼(編譯.dll以前修改) 其一:com.google.zxing.qrcode.encoder.encoder類中的 internal const System.String DEFAULT_BYTE_MODE_ENCODING = "ISO-8859-1"; 此處,將ISO-8859-1改成UTF-8 其二:com.google.zxing.qrcode.decoder.DecodedBitStreamParser類的成員 private const System.String UTF8 = "UTF8"; 應將UTF8改成UTF-8 生成代碼: //引用 using com.google.zxing.qrcode; using com.google.zxing; using com.google.zxing.common; using ByteMatrix = com.google.zxing.common.ByteMatrix; using EAN13Writer = com.google.zxing.oned.EAN13Writer; using EAN8Writer = com.google.zxing.oned.EAN8Writer; using MultiFormatWriter = com.google.zxing.MultiFormatWriter; 方法: string content = "二維碼信息"; ByteMatrix byteMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, 300, 300); Bitmap bitmap = toBitmap(byteMatrix); pictureBox1.Image = bitmap; SaveFileDialog sFD = new SaveFileDialog(); sFD.Filter = "保存圖片(*.png) |*.png|全部文件(*.*) |*.*"; sFD.DefaultExt = "*.png|*.png"; sFD.AddExtension = true; if (sFD.ShowDialog() == DialogResult.OK) { if (sFD.FileName != "") { writeToFile(byteMatrix, System.Drawing.Imaging.ImageFormat.Png, sFD.FileName); } } 解析: if (this.openFileDialog1.ShowDialog() != DialogResult.OK) { return; } Image img = Image.FromFile(this.openFileDialog1.FileName); Bitmap bmap; try { bmap = new Bitmap(img); } catch (System.IO.IOException ioe) { MessageBox.Show(ioe.ToString()); return; } if (bmap == null) { MessageBox.Show("Could not decode image"); return; } LuminanceSource source = new RGBLuminanceSource(bmap, bmap.Width, bmap.Height); com.google.zxing.BinaryBitmap bitmap1 = new com.google.zxing.BinaryBitmap(new HybridBinarizer(source)); Result result; try { result = new MultiFormatReader().decode(bitmap1); } catch (ReaderException re) { MessageBox.Show(re.ToString()); return; } MessageBox.Show(result.Text); public static void writeToFile(ByteMatrix matrix, System.Drawing.Imaging.ImageFormat format, string file) { Bitmap bmap = toBitmap(matrix); bmap.Save(file, format); } public static Bitmap toBitmap(ByteMatrix matrix) { int width = matrix.Width; int height = matrix.Height; Bitmap bmap = new Bitmap(width, height, System.Drawing.Imaging.PixelFormat.Format32bppArgb); for (int x = 0; x < width; x++) { for (int y = 0; y < height; y++) { bmap.SetPixel(x, y, matrix.get_Renamed(x, y) != -1 ? ColorTranslator.FromHtml("0xFF000000") : ColorTranslator.FromHtml("0xFFFFFFFF")); } } return bmap; }