16進文字列を文字列出力に変換

///<summary>
    ///  16 
    /// </summary>
    /// <param name="hex"></param>
    /// <param name="charset"> , "utf-8","gb2312"</param>
    /// <returns></returns>
    public  string HexToStr(string hex, string charset)
    {
        if (hex == null)
            throw new ArgumentNullException("hex");
        hex = hex.Replace(",", "");
        hex = hex.Replace("
", "");
        hex = hex.Replace("\\", "");
        hex = hex.Replace(" ", "");
        if (hex.Length % 2 != 0)
        {
            hex += "20";// 
        }
        //   hex   byte  。 
        byte[] bytes = new byte[hex.Length / 2];

        for (int i = 0; i < bytes.Length; i++)
        {
            try
            {
                //   byte。 
                bytes[i] = byte.Parse(hex.Substring(i * 2, 2),
                System.Globalization.NumberStyles.HexNumber);
            }
            catch
            {
                // Rethrow an exception with custom message. 
                throw new ArgumentException("hex is not a valid hex number!", "hex");
            }
        }
        System.Text.Encoding chs = System.Text.Encoding.GetEncoding(charset);
        return chs.GetString(bytes);
    }

 

public string HexToStr(string mHex) //  
        {
            mHex = mHex.Replace(" ", "");
            if (mHex.Length <= 0) return "";
            byte[] vBytes = new byte[mHex.Length / 2];
            for (int i = 0; i < mHex.Length; i += 2)
                if (!byte.TryParse(mHex.Substring(i, 2), NumberStyles.HexNumber, null, out vBytes[i / 2]))
                    vBytes[i / 2] = 0;
            return ASCIIEncoding.Default.GetString(vBytes);
        }

 public string StrToHex(string mStr) // 
        {
            return BitConverter.ToString(
            ASCIIEncoding.Default.GetBytes(mStr)).Replace("-", " ");
        } 

 

 /// <summary>  

        /// 16   

        /// </summary>  

        /// <param name="hexString"></param>  

        /// <returns></returns>  

        public static byte[] strToToHexByte(string hexString)
        {

            hexString = hexString.Replace(" ", "");

            if ((hexString.Length % 2) != 0)

                hexString += " ";

            byte[] returnBytes = new byte[hexString.Length / 2];

            for (int i = 0; i < returnBytes.Length; i++)

                returnBytes[i] = Convert.ToByte(hexString.Substring(i * 2, 2).Trim(), 16);

            return returnBytes;

        }