.NET 常用转换

  　　　　/// <summary>
        /// ASCII字符串转10进制 16进制
        /// </summary>
        /// <param name="value">字符串</param>
        /// <param name="famate">要转换的格式 10 16</param>
        /// <param name="c">间隔符</param>
        /// <returns></returns>
        public static string GetChars(string value, char? c, int? length=2, int famate = 10)
        {
            byte[] ba = ASCIIEncoding.Default.GetBytes(value);
            string res = string.Empty;
            foreach (var s in ba)
            {
                string tempstr = string.Empty;
                switch (famate)
                {
                    case 10: tempstr = s.ToString();
                        break;
                    case 16: tempstr = String.Format("{0:X}", s);
                        break;
                    default: break;
                }
                //验证是否需要补0
                if (length.HasValue&&length.Value>1)
                    tempstr = tempstr.PadLeft(length.Value, '0');
                //验证是否需要添加间隔符
                if (c.HasValue)
                    res += tempstr + c.ToString();
                else
                    res += tempstr;
            }
            return res;
        }

　　　　 /// <summary>
        /// 2 8 6 10 16进制相互转化函数
        /// </summary>
        /// <param name="value"></param>
        /// <param name="fromBase"></param>
        /// <param name="toBase"></param>
        /// <returns></returns>
        public static string ConvertString(string value, int fromBase, int toBase)
        {
            int intValue = Convert.ToInt32(value, fromBase);
            return Convert.ToString(intValue, toBase);
        }

   /// <summary>
        ///作用：将16进制数据编码转化为字符串，是Encode的逆过程
        /// </summary>
        /// <param name="strDecode"></param>
        /// <returns></returns>
        public static string Decode(string strDecode)
        {
            string sResult = "";
            for (int i = 0; i < strDecode.Length / 4; i++)
            {
                sResult += (char)Int16.Parse(strDecode.Substring(i * 4, 4), NumberStyles.HexNumber);
            }
            return sResult;
        }

        /// <summary>
        /// 作用：将字符串内容转化为16进制数据编码，其逆过程是Decode
        /// 参数说明：
        /// strEncode 需要转化的原始字符串
        /// 转换的过程是直接把字符转换成Unicode字符,比如数字"3"-->0033,汉字"我"-->U+6211
        /// 函数decode的过程是encode的逆过程.
        /// </summary>
        /// <param name="strEncode"></param>
        /// <returns></returns>
        public static string Encode(string strEncode)
        {
            string strReturn = "";// 存储转换后的编码
            foreach (short shortx in strEncode.ToCharArray())
            {
                strReturn += shortx.ToString("X4");
            }
            return strReturn;
        }

 #region 获取整数的某一位，设置整数的某一位
        /// <summary>
        /// 取整数的某一位
        /// </summary>
        /// <param name="_Resource">要取某一位的整数</param>
        /// <param name="_Mask">要取的位置索引，自右至左为0-7</param>
        /// <returns>返回某一位的值（0或者1）</returns>
        public static int getIntegerSomeBit(int _Resource, int _Mask)
        {
            return _Resource >> _Mask & 1;
        }


        /// <summary>
        /// 将整数的某位置为0或1
        /// </summary>
        /// <param name="_Mask">整数的某位</param>
        /// <param name="a">整数</param>
        /// <param name="flag">是否置1，TURE表示置1，FALSE表示置0</param>
        /// <returns>返回修改过的值</returns>
        public static int setIntegerSomeBit(int _Mask, int a, bool flag)
        {
            if (flag)
            {
                a |= (0x1 << _Mask);
            }
            else
            {
                a &= ~(0x1 << _Mask);
            }
            return a;
        }
        #endregion

 /// <summary>
        /// 2 8 6 10 16进制相互转化函数
        /// </summary>
        /// <param name="value"></param>
        /// <param name="fromBase"></param>
        /// <param name="toBase"></param>
        /// <returns></returns>
        public static string ConvertString(string value, int fromBase, int toBase)
        {
            int intValue = Convert.ToInt32(value, fromBase);
            return Convert.ToString(intValue, toBase);
        }