c# 字符串转换为BCD编码

        /// <summary>
        /// 字符串转换为BCD编码
        /// </summary>
        /// <param name="strTemp">转换字符串</param>
        /// <returns>BCD编码</returns>
        private Byte[] convertFrom(string strTemp)
        {
            try
            {
                if (Convert.ToBoolean(strTemp.Length & 1))//数字的二进制码最后1位是1则为奇数  
                {
                    strTemp = "0" + strTemp;//数位为奇数时前面补0  
                }
                Byte[] aryTemp = new Byte[strTemp.Length / 2];
                for (int i = 0; i < (strTemp.Length / 2); i++)
                {
                    aryTemp[i] = (Byte)(((strTemp[i * 2] - '0') << 4) | (strTemp[i * 2 + 1] - '0'));
                }
                return aryTemp;//高位在前  
            }
            catch
            { return null; }
        }