C#生成二維碼

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;
        }
        /// <summary>
        /// 生成二維碼圖片
        /// </summary>
        /// <param name="strMessage">要生成二維碼的字符串</param>
        /// <param name="width">二維碼圖片寬度</param>
        /// <param name="height">二維碼圖片高度</param>
        /// <returns></returns>
        private Bitmap GenByZXingNet(string msg)
        {
            BarcodeWriter writer = new BarcodeWriter();
            writer.Format = BarcodeFormat.QR_CODE;
            writer.Options.Hints.Add(EncodeHintType.CHARACTER_SET, "UTF-8");//編碼問題
            writer.Options.Hints.Add(
                EncodeHintType.ERROR_CORRECTION,
                ZXing.QrCode.Internal.ErrorCorrectionLevel.H
            );
            const int codeSizeInPixels = 250;   //設置圖片長寬
            writer.Options.Height = writer.Options.Width = codeSizeInPixels;
            writer.Options.Margin = 0;//設置邊框
            ZXing.Common.BitMatrix bm = writer.Encode(msg);
            Bitmap img = writer.Write(bm);
            return img;
        }