生成二维码

需要引用ThoughtWorks.QRCode.dll

public Image GCode(string data)
{
QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();

qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;

qrCodeEncoder.QRCodeScale = 1;
qrCodeEncoder.QRCodeVersion = 4;

qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;
var pbImg= qrCodeEncoder.Encode(data);
var width = pbImg.Width / 10;
var dwidth = width * 2;
Bitmap bmp = new Bitmap(pbImg.Width + dwidth, pbImg.Height + dwidth);
Graphics g = Graphics.FromImage(bmp);
var c = System.Drawing.Color.White;
g.FillRectangle(new SolidBrush(c), 0, 0, pbImg.Width + dwidth, pbImg.Height + dwidth);
g.DrawImage(pbImg, width, width);
g.Dispose();

return bmp;
}