.net core .net 6 使用二维码

控制器

using Microsoft.AspNetCore.Mvc;
using QRCoder;
using System.Drawing;
using System.IO;

namespace v6bbs_core.web.Controllers
{
    public class qrcodeController : Controller
    {
        public IActionResult index(string url)
        {
            QRCodeGenerator qrGenerator = new QRCodeGenerator();
            QRCodeData qrCodeData = qrGenerator.CreateQrCode(url, QRCodeGenerator.ECCLevel.Q);
            QRCode qrCode = new QRCode(qrCodeData);
            Bitmap qrCodeImage = qrCode.GetGraphic(20);

            MemoryStream ms = new MemoryStream();
            qrCodeImage.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
            qrCodeImage.Dispose();
            return File(ms.ToArray(), "images/jpeg");
        }
    }
}

无须写Startup注入和接口。