C#生成二维条码zxing类库使用
到zxing的主页: http://code.google.com/p/zxing/
找到其中的CSharp文件夹,在vs中打开并编译,将obj下debug中的zxing.dll复制并粘帖到你的项目中的bin文件目录下,
右击添加项目引用。将zxing.dll引用到项目中,就可以在需要的地方使用了。
源代码中有两处UTF-8的问题,会导致中文出现乱码(编译.dll之前修改)
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
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 = "二维码信息";
ByteMatrix byteMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, 300, 300);
Bitmap bitmap = toBitmap(byteMatrix);
pictureBox1.Image = bitmap;
SaveFileDialog sFD = new SaveFileDialog();
sFD.Filter = "保存图片(*.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:
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;
}