这是一个DOME，直接下载使用，仅实现二维码生成功能，如要增加二维码打印功能可以参考以下代码，如要增加其他功能请自行开发。
Image image = qrCodeEncoder.Encode(strData);
Bitmap printPicture = new Bitmap(image.Width+20, image.Height + 40);
Graphics g = Graphics.FromImage(printPicture);
Rectangle destRect = new Rectangle(10, 10, image.Width, image.Height);
g.DrawImage(image, destRect, 0, 0, image.Width, image.Height, GraphicsUnit.Pixel);
RectangleF layoutRectangle = new RectangleF(0, image.Height + 20, image.Width, 30);
g.DrawString(strCode, font, brush, layoutRectangle);
string filepath = System.Web.HttpContext.Current.Server.MapPath(@"~\attachment")+ "1.png";
System.IO.FileStream fs = new System.IO.FileStream(filepath, System.IO.FileMode.OpenOrCreate,System.IO.FileAccess.Write);
printPicture.Save(fs, System.Drawing.Imaging.ImageFormat.Png);
fs.Close();printPicture.Dispose();(This is a DOME, which is directly downloaded. It only realizes the generation of two-dimensional code. If we want to increase the two-dimensional code printing function, we can refer to the following code, if you want to add other functions, please develop it yourself.)