.net core里用ZXing生成二维码

先获取Nuget包

        static void Main(string[] args)
        {
            string content = "二维码信息";
            BitMatrix byteMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, 300, 300);
            System.Drawing.Bitmap bitmap = toBitmap(byteMatrix);
        }

        public static System.Drawing.Bitmap toBitmap(BitMatrix matrix)
        {
            int width = matrix.Width;
            int height = matrix.Height;
            var white = System.Drawing.ColorTranslator.FromHtml("0xFFFFFFFF");
            var black = System.Drawing.ColorTranslator.FromHtml("0xFF000000");
            System.Drawing.Bitmap bmap = new System.Drawing.Bitmap(width, height, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
            for (int x = 0; x < width; x++)
            {
                for (int y = 0; y < height; y++)
                {
                    bmap.SetPixel(x, y, matrix[x, y] ? black : white);
                }
            }
            return bmap;
        }