public Bitmap EncodeToImage(string str, QRCodeSaveSize saveSize)
{
QrCode qrCode = _qrEncoder.Encode(str);
GraphicsRenderer render = new GraphicsRenderer(new FixedModuleSize(Convert.ToInt32(saveSize), QuietZoneModules.Two), Brushes.Black, Brushes.White);
MemoryStream ms = new MemoryStream();
render.WriteToStream(qrCode.Matrix, ImageFormat.Png, ms);
Bitmap bitmap = new Bitmap(ms);
return(bitmap);
}
public void EncodeToPng(string str, string picpath, QRCodeSaveSize saveSize)
{
QrCode qrCode = _qrEncoder.Encode(str);
//保存成png文件
GraphicsRenderer render = new GraphicsRenderer(new FixedModuleSize(Convert.ToInt32(saveSize), QuietZoneModules.Two), Brushes.Black, Brushes.White);
using (FileStream stream = new FileStream(picpath, FileMode.OpenOrCreate)) //OpenOrCreate打开新文件默认就是truncate的了，如果再显式指定Truncate反而会报错当文件不存在的时候
{
render.WriteToStream(qrCode.Matrix, ImageFormat.Png, stream);
}
//Bitmap bitmap = new Bitmap(165, 165);
//Graphics g = Graphics.FromImage(bitmap);
//render.Draw(g, qrCode.Matrix);
//bitmap.Save("a.bmp");
}
