C#二维码生成与读取

使用ZXing.dll，下载类库，添加引用即可

命名空间：using ZXing;

生成二维码

    /// <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 GetQRCodeByZXingNet(String strMessage, Int32 width, Int32 height)
    {
        Bitmap result = null;
        try
        {
            BarcodeWriter barCodeWriter = new BarcodeWriter();
            barCodeWriter.Format = BarcodeFormat.QR_CODE;
            barCodeWriter.Options.Hints.Add(EncodeHintType.CHARACTER_SET, "UTF-8");
            barCodeWriter.Options.Hints.Add(EncodeHintType.ERROR_CORRECTION, ZXing.QrCode.Internal.ErrorCorrectionLevel.H);
            barCodeWriter.Options.Height = height;
            barCodeWriter.Options.Width = width;
            barCodeWriter.Options.Margin = 0;
            ZXing.Common.BitMatrix bm = barCodeWriter.Encode(strMessage);
            result = barCodeWriter.Write(bm);
        }
        catch (Exception ex)
        {
            //异常输出
        }
        return result;
    }

读取二维码：

        /// <summary>
        /// 解码二维码
        /// </summary>
        /// <param name="barcodeBitmap">待解码的二维码图片</param>
        /// <returns>扫码结果</returns>
        private string DecodeQrCode(Bitmap barcodeBitmap)
        {
             BarcodeReader reader = new BarcodeReader();
             reader.Options.CharacterSet = "UTF-8";
             var result = reader.Decode(barcodeBitmap);
             return (result == null) ? null : result.Text;
        }