二维码生成与返回客户端

引用

QRCoder

示例代码

<img src="/Controller/GetImg"/>

public ActionResult GetImg()
{
    string authorizeUrl="";
    string authorizeCode = Guid.NewGuid().ToString();

    //生成二维码
    string url = $"{authorizeUrl}?authorizeCode={authorizeCode}";
    QRCodeGenerator qrGenerator = new QRCoder.QRCodeGenerator();
    QRCodeData qrCodeData = qrGenerator.CreateQrCode(url, QRCodeGenerator.ECCLevel.Q);
    QRCode qrcode = new QRCode(qrCodeData);
    Bitmap qrCodeImage = qrcode.GetGraphic(5, Color.Black, Color.White, null, 15, 6, false);
    MemoryStream ms = new MemoryStream();
    qrCodeImage.Save(ms, ImageFormat.Jpeg);
    return File(ms.ToArray(), "image/jpeg");
}

参考资料

https://blog.csdn.net/tcjiaan/article/details/7182892
https://www.cnblogs.com/wlays/p/7994393.html