本文實例總結(jié)了ASP.NET生成二維碼的方法。分享給大家供大家參考,具體如下:
分享一例c#生成二維碼的代碼,直接引用ThoughtWorks.QRCode.dll 類生成二維碼,有需要的朋友參考下。
方法1.直接引用ThoughtWorks.QRCode.dll 類,生成二維碼。
代碼示例:
ThoughtWorks.QRCode.Codec.QRCodeEncoder encoder = new QRCodeEncoder();encoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;//編碼方法(注意:BYTE能支持中文,ALPHA_NUMERIC掃描出來的都是數(shù)字)encoder.QRCodeScale = 4;//大小encoder.QRCodeVersion = 0;//版本(注意:設置為0主要是防止編碼的字符串太長時發(fā)生錯誤)encoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;String qrdata = "二維碼信息";System.Drawing.Bitmap bp = encoder.Encode(qrdata.ToString(), Encoding.GetEncoding("GB2312"));Image image = bp;Object oMissing = System.Reflection.Missing.Value;pictureBox1.Image = bp;
保存二維碼圖片:
代碼示例:
SaveFileDialog sf = new SaveFileDialog();sf.Title = "選擇保存文件位置";sf.Filter = "保存圖片(*.jpg) |*.jpg|所有文件(*.*) |*.*";//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; //獲得文件路徑 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") ;//給文件名后加上時間 string FilePath = localFilePath.Substring(0, localFilePath.LastIndexOf(".")); //獲取文件路徑,帶文件名,不帶后綴 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;
方法2.引用ZXing類庫。
ZXing是一個開源Java類庫用于解析多種格式的1D/2D條形碼。目標是能夠?qū)R編碼、Data Matrix、UPC的1D條形碼進行解碼。于此同時,它同樣提供 cpp,ActionScript,android,iPhone,rim,j2me,j2se,jruby,C#等方式的類庫。zxing類庫的作用主 要是解碼,是目前開源類庫中解碼能力比較強的(商業(yè)的另說,不過對于動輒成千上萬的類庫授權(quán)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中打開并編譯,將obj下debug中的zxing.dll復制并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,就可以在需要的地方使用了。
源代碼中有兩處UTF-8的問題,會導致中文出現(xiàn)亂碼(編譯.dll之前修改)
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改為UTF-8
其二:com.google.zxing.qrcode.decoder.DecodedBitStreamParser類的成員
private const System.String UTF8 = "UTF8";
應將UTF8改為UTF-8
代碼示例:
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|所有文件(*.*) |*.*";sFD.DefaultExt = "*.png|*.png";sFD.AddExtension = true;if (sFD.ShowDialog() == DialogResult.OK){if (sFD.FileName != ""){ writeToFile(byteMatrix, System.Drawing.Imaging.ImageFormat.Png, sFD.FileName);}}
解析二維碼:
代碼示例:
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;}