本文转自：

 

二维码的生成：

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;

 

 private void button1_Click(object sender, EventArgs e)

        {

            string content = textBox1.Text;

            ByteMatrix byteMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, 200, 200);

            Bitmap bitmap = toBitmap(byteMatrix);

            pictureBox1.Image = bitmap;

            //writeToFile(byteMatrix, System.Drawing.Imaging.ImageFormat.Png, sFD.FileName);

            //SaveFileDialog sFD = new SaveFileDialog();

            //sFD.DefaultExt = "*.png|*.png";

            //sFD.AddExtension = true;

            //try

            //{

            //    if (sFD.ShowDialog() == DialogResult.OK)

            //    {

 

            //    }

            //}

            //catch (Exception ex)

            //{

            //    MessageBox.Show(ex.Message);

            //}

        }

 

 

 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;               

        } 

 

 

二维码的读取识别：

private void button1_Click(object sender, EventArgs e)   

        {   

            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 bitmap = new com.google.zxing.BinaryBitmap(new COMMON.HybridBinarizer(source));   

            Result result;   

            try  

            {   

                result = new MultiFormatReader().decode(bitmap);   

            }   

            catch(ReaderException re)   

            {   

                MessageBox.Show(re.ToString());   

                return;   

            }   

               

            MessageBox.Show(result.Text);           

        } 

源代码中有两处UTF-8的问题，会导致乱码，

其一：com.google.zxing.qrcode.encoder.encoder类中的

internal const System.String DEFAULT_BYTE_MODE_ENCODING = "ISO-8859-1";

此处，将ISO-8859-1改为UTF-8

其二：com.google.zxing.qrcode.decoder.DecodedBitStreamParser类的成员

private const System.String UTF8 = "UTF8";

应将UTF8改为UTF-8