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