二维码生成 - QrCodeNet

下载QrCodeNet

 /// <summary>

         /// 生成QR码

         /// </summary>

         /// <param name="output_path">输出路径</param>

         /// <param name="text">写入文本</param>

         /// <param name="scale">缩放比例</param>

         public static void GetQRCode(String output_path, String text, Int32 scale)

         {

             QrEncoder qrEncoder = new QrEncoder(ErrorCorrectionLevel.L);

             QrCode qrCode = new QrCode();

             qrEncoder.TryEncode(text, out qrCode);

             Bitmap img = new Bitmap(qrCode.Matrix.Width * scale, qrCode.Matrix.Height * scale);

             img.SetResolution(180f, 180f);

             Graphics gdiobj = Graphics.FromImage(img);

             gdiobj.CompositingQuality = CompositingQuality.HighQuality;

             gdiobj.SmoothingMode = SmoothingMode.HighQuality;

             gdiobj.InterpolationMode = InterpolationMode.HighQualityBicubic;

             gdiobj.PixelOffsetMode = PixelOffsetMode.HighQuality;

             for (Int32 i = ; i < qrCode.Matrix.Height; i++)

             {

                 for (Int32 j = ; j < qrCode.Matrix.Width; j++)

                 {

                     if (qrCode.Matrix.InternalArray[i, j])

                     {

                         gdiobj.FillRectangle(new SolidBrush(Color.Black), i * scale, j * scale, scale, scale);

                     }

                 }

             }

             System.Drawing.Imaging.EncoderParameters ep = new System.Drawing.Imaging.EncoderParameters();

             ep.Param[] = new System.Drawing.Imaging.EncoderParameter(System.Drawing.Imaging.Encoder.Quality, 800L);

             System.Drawing.Imaging.ImageCodecInfo ici = GetEncoder(ImageFormat.Png);

             if (ici != null)

             {

                 img.Save(output_path, ici, ep);

             }

             else

             {

                 img.Save(output_path, ImageFormat.Png);

             }

             img.Dispose();

             gdiobj.Dispose();

         }

比例的缩放没写好