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;         }         /// <summary>         /// 生成二维码图片         /// </summary>         /// <param name="strMessage">要生成二维码的字符串</param>         /// <param name="width">二维码图片宽度</param>         /// <param name="height">二维码图片高度</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");//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;         }