zxing二维码的生成与解码(C#)

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