Ejemplo n.º 1
0
        Gma.QrCodeNet.Encoding.ErrorCorrectionLevel ToErrorCorrectionLevel(ErrorCorrectionLevel level)
        {
            switch (level)
            {
            case ErrorCorrectionLevel.L:
                return(Gma.QrCodeNet.Encoding.ErrorCorrectionLevel.L);

            case ErrorCorrectionLevel.M:
                return(Gma.QrCodeNet.Encoding.ErrorCorrectionLevel.M);

            case ErrorCorrectionLevel.Q:
                return(Gma.QrCodeNet.Encoding.ErrorCorrectionLevel.Q);

            case ErrorCorrectionLevel.H:
                return(Gma.QrCodeNet.Encoding.ErrorCorrectionLevel.H);

            default:
                throw new NotSupportedException("不受支持的ErrorCorrectionLevel值: " + level.ToString());
            }
        }
Ejemplo n.º 2
0
        /// <summary>
        /// Generates an QR BarCode containing the specified data.
        /// </summary>
        /// <param name="data">The data to encode.</param>
        /// <param name="size">Image size.</param>
        /// <param name="margin">The width of the white border around the data portion of the code. This is in rows, not in pixels.</param>
        /// <param name="errorCorrection">QR codes support four levels of error correction to enable recovery of missing, misread, or obscured data. Greater redundancy is achieved at the cost of being able to store less data.</param>
        /// <returns>The image containing the generated QR BarCode.</returns>
        public static Image Generate(string data, int size, int margin, ErrorCorrectionLevel errorCorrection)
        {
            if (data == null)
            {
                throw new ArgumentNullException("data");
            }
            if (size < 1)
            {
                throw new ArgumentOutOfRangeException("size", size, "Must be greater than zero.");
            }
            if (margin < 0)
            {
                throw new ArgumentOutOfRangeException("margin", margin, "Must be greater than or equal to zero.");
            }
            if (!Enum.IsDefined(typeof(ErrorCorrectionLevel), errorCorrection))
            {
                throw new InvalidEnumArgumentException("errorCorrectionLevel", (int)errorCorrection, typeof(ErrorCorrectionLevel));
            }

            var link = string.Format(m_GoogleApiUrl, size, HttpUtility.UrlEncode(data), errorCorrection.ToString()[0], margin);

            using (var ms = new MemoryStream(m_WebClient.DownloadData(link)))
            {
                return(Image.FromStream(ms));
            }
        }