C#生成二维码

http://zxingnet.codeplex.com/

https://www.cnblogs.com/WhyShang/p/3704513.html

private void button1_Click(object sender, EventArgs e)        {                        string msg = textBox1.Text;            Image img = GenByZXingNet(msg);            this.pictureBox1.Image=img;        }        /// 
        /// 生成二维码图片        /// 
        /// 要生成二维码的字符串        /// 二维码图片宽度        /// 二维码图片高度        ///         private Bitmap GenByZXingNet(string msg)        {            BarcodeWriter writer = new BarcodeWriter();            writer.Format = BarcodeFormat.QR_CODE;            writer.Options.Hints.Add(EncodeHintType.CHARACTER_SET, "UTF-8");//编码问题            writer.Options.Hints.Add(                EncodeHintType.ERROR_CORRECTION,                ZXing.QrCode.Internal.ErrorCorrectionLevel.H            );            const int codeSizeInPixels = 250;   //设置图片长宽            writer.Options.Height = writer.Options.Width = codeSizeInPixels;            writer.Options.Margin = 0;//设置边框            ZXing.Common.BitMatrix bm = writer.Encode(msg);            Bitmap img = writer.Write(bm);            return img;        }