C#字符操作

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//字符串转ASCII码
 // str1:字符串     str2:ASCII码
  if (Encoding.GetEncoding("unicode").GetBytes(new char[] {  str1[0] })[1] == 0)//判断输入是否为字母
    {
           str2= Encoding.GetEncoding("unicode").GetBytes str1[0].ToString();//得到字符的ASCII码值
    }


 //ASCII码转字符
  int P_int_Num;//定义整型局部变量
  if (int.TryParse(txtascii.Text, out P_int_Num))//将输入的字符转换为数字 
    {
          txtstr.Text = ((char)P_int_Num).ToString();//将ASCII码转换为字符
     }


//汉字转区位码
       /// <summary>得到汉字区位码方法
        /// 
        /// </summary>
        /// <param name="strChinese">汉字字符</param>
        /// <returns>返回汉字区位码</returns>
        public string getCode(string Chinese)
        {
            byte[] P_bt_array = Encoding.Default.GetBytes(Chinese);//得到汉字的Byte数组
            int front = (short)(P_bt_array[0] - '\0');//将字节数组的第一位转换成short类型
            int back = (short)(P_bt_array[1] - '\0');//将字节数组的第二位转换成short类型
            return (front - 160).ToString() + (back - 160).ToString();//计算并返回区位码
        }

//区位码转汉字
        /// <summary>根据区位码得到汉字
        /// 
        /// </summary>
        /// <param name="str">区位码</param>
        /// <returns></returns>
        public string gethanzi(string str)
        {
            byte[] array = new byte[2];
            string str1 = str.Substring(0, 2);
            string str2 = str.Substring(2, 2);
            int front = Convert.ToInt32(str1) + 160;
            int back = Convert.ToInt32(str2) + 160;
            array[0] = (byte)front;
            array[1] = (byte)back;
            return System.Text.Encoding.Default.GetString(array);

        }

//进制转换

class Transform
{
internal string TenToBinary(long value)//将十进制转换为二进制
{
return Convert.ToString(value, 2);
}
internal string TenToEight(long value)//将十进制转换为八进制
{
return Convert.ToString(value, 8);
}
internal string TenToSixteen(long value)//将十进制转换为十六进制
{
return Convert.ToString(value, 16);
}
internal string BinaryToEight(long value)//将二进制转换为八进制
{
return Convert.ToString(
Convert.ToInt64(value.ToString(), 2), 8);
}
internal string BinaryToTen(long value)//将二进制转换为十进制
{
return Convert.ToInt64(
value.ToString(), 2).ToString();
}
internal string BinaryToSixteen(long value)//将二进制转换为十六进制
{
return Convert.ToString(
Convert.ToInt64(value.ToString(), 2), 16);
}
internal string EightToBinary(long value)//将八进制转换为二进制
{
return Convert.ToString(
Convert.ToInt64(value.ToString(), 8), 2);
}
internal string EightToTen(long value)//将八进制转换为十进制
{
return Convert.ToInt64(
value.ToString(), 8).ToString();
}
internal string EightToSixteen(long value)//将八进制转换为十六进制
{
return Convert.ToString(
Convert.ToInt64(value.ToString(), 8), 16);
}
internal string SixteenToBinary(string value)//将十六进制转换为二进制
{
return Convert.ToString(
Convert.ToInt64(value, 16), 2);
}
internal string SixteenToEight(string value)//将十六进制转换为八进制
{
return Convert.ToString(
Convert.ToInt64(value, 16), 8);
}
internal string SixteenToTen(string value)//将十六进制转换为十进制
{
return Convert.ToUInt64(value, 16).ToString();
}
}

汉字拼音转换类

/// <summary>汉字拼音转换类
    /// 
    /// </summary>
    public class PinYin
    {
        #region 数组信息

        private static int[] pyValue = new int[] 
        {
            -20319, -20317, -20304, -20295, -20292, -20283, -20265, -20257, -20242, 
            -20230, -20051, -20036, -20032, -20026, -20002, -19990, -19986, -19982,
            -19976, -19805, -19784, -19775, -19774, -19763, -19756, -19751, -19746, 
            -19741, -19739, -19728, -19725, -19715, -19540, -19531, -19525, -19515, 
            -19500, -19484, -19479, -19467, -19289, -19288, -19281, -19275, -19270, 
            -19263, -19261, -19249, -19243, -19242, -19238, -19235, -19227, -19224, 
            -19218, -19212, -19038, -19023, -19018, -19006, -19003, -18996, -18977,
            -18961, -18952, -18783, -18774, -18773, -18763, -18756, -18741, -18735, 
            -18731, -18722, -18710, -18697, -18696, -18526, -18518, -18501, -18490,
            -18478, -18463, -18448, -18447, -18446, -18239, -18237, -18231, -18220,
            -18211, -18201, -18184, -18183, -18181, -18012, -17997, -17988, -17970, 
            -17964, -17961, -17950, -17947, -17931, -17928, -17922, -17759, -17752, 
            -17733, -17730, -17721, -17703, -17701, -17697, -17692, -17683, -17676,
            -17496, -17487, -17482, -17468, -17454, -17433, -17427, -17417, -17202, 
            -17185, -16983, -16970, -16942, -16915, -16733, -16708, -16706, -16689, 
            -16664, -16657, -16647, -16474, -16470, -16465, -16459, -16452, -16448, 
            -16433, -16429, -16427, -16423, -16419, -16412, -16407, -16403, -16401, 
            -16393, -16220, -16216, -16212, -16205, -16202, -16187, -16180, -16171,
            -16169, -16158, -16155, -15959, -15958, -15944, -15933, -15920, -15915, 
            -15903, -15889, -15878, -15707, -15701, -15681, -15667, -15661, -15659, 
            -15652, -15640, -15631, -15625, -15454, -15448, -15436, -15435, -15419,
            -15416, -15408, -15394, -15385, -15377, -15375, -15369, -15363, -15362, 
            -15183, -15180, -15165, -15158, -15153, -15150, -15149, -15144, -15143, 
            -15141, -15140, -15139, -15128, -15121, -15119, -15117, -15110, -15109, 
            -14941, -14937, -14933, -14930, -14929, -14928, -14926, -14922, -14921,
            -14914, -14908, -14902, -14894, -14889, -14882, -14873, -14871, -14857, 
            -14678, -14674, -14670, -14668, -14663, -14654, -14645, -14630, -14594,
            -14429, -14407, -14399, -14384, -14379, -14368, -14355, -14353, -14345,
            -14170, -14159, -14151, -14149, -14145, -14140, -14137, -14135, -14125, 
            -14123, -14122, -14112, -14109, -14099, -14097, -14094, -14092, -14090, 
            -14087, -14083, -13917, -13914, -13910, -13907, -13906, -13905, -13896, 
            -13894, -13878, -13870, -13859, -13847, -13831, -13658, -13611, -13601,
            -13406, -13404, -13400, -13398, -13395, -13391, -13387, -13383, -13367, 
            -13359, -13356, -13343, -13340, -13329, -13326, -13318, -13147, -13138, 
            -13120, -13107, -13096, -13095, -13091, -13076, -13068, -13063, -13060, 
            -12888, -12875, -12871, -12860, -12858, -12852, -12849, -12838, -12831,
            -12829, -12812, -12802, -12607, -12597, -12594, -12585, -12556, -12359,
            -12346, -12320, -12300, -12120, -12099, -12089, -12074, -12067, -12058,
            -12039, -11867, -11861, -11847, -11831, -11798, -11781, -11604, -11589, 
            -11536, -11358, -11340, -11339, -11324, -11303, -11097, -11077, -11067,
            -11055, -11052, -11045, -11041, -11038, -11024, -11020, -11019, -11018,
            -11014, -10838, -10832, -10815, -10800, -10790, -10780, -10764, -10587,
            -10544, -10533, -10519, -10331, -10329, -10328, -10322, -10315, -10309, 
            -10307, -10296, -10281, -10274, -10270, -10262, -10260, -10256, -10254 
        };

        private static string[] pyName = new string[]

         { 
             "A", "Ai", "An", "Ang", "Ao", "Ba", "Bai", "Ban", "Bang", "Bao", "Bei", 
             "Ben", "Beng", "Bi", "Bian", "Biao", "Bie", "Bin", "Bing", "Bo", "Bu",
             "Ba", "Cai", "Can", "Cang", "Cao", "Ce", "Ceng", "Cha", "Chai", "Chan",
             "Chang", "Chao", "Che", "Chen", "Cheng", "Chi", "Chong", "Chou", "Chu",
             "Chuai", "Chuan", "Chuang", "Chui", "Chun", "Chuo", "Ci", "Cong", "Cou",
             "Cu", "Cuan", "Cui", "Cun", "Cuo", "Da", "Dai", "Dan", "Dang", "Dao", "De", 
             "Deng", "Di", "Dian", "Diao", "Die", "Ding", "Diu", "Dong", "Dou", "Du", 
             "Duan", "Dui", "Dun", "Duo", "E", "En", "Er", "Fa", "Fan", "Fang", "Fei", 
             "Fen", "Feng", "Fo", "Fou", "Fu", "Ga", "Gai", "Gan", "Gang", "Gao", "Ge", 
             "Gei", "Gen", "Geng", "Gong", "Gou", "Gu", "Gua", "Guai", "Guan", "Guang", 
             "Gui", "Gun", "Guo", "Ha", "Hai", "Han", "Hang", "Hao", "He", "Hei", "Hen", 
             "Heng", "Hong", "Hou", "Hu", "Hua", "Huai", "Huan", "Huang", "Hui", "Hun",
             "Huo", "Ji", "Jia", "Jian", "Jiang", "Jiao", "Jie", "Jin", "Jing", "Jiong", 
             "Jiu", "Ju", "Juan", "Jue", "Jun", "Ka", "Kai", "Kan", "Kang", "Kao", "Ke",
             "Ken", "Keng", "Kong", "Kou", "Ku", "Kua", "Kuai", "Kuan", "Kuang", "Kui", 
             "Kun", "Kuo", "La", "Lai", "Lan", "Lang", "Lao", "Le", "Lei", "Leng", "Li",
             "Lia", "Lian", "Liang", "Liao", "Lie", "Lin", "Ling", "Liu", "Long", "Lou", 
             "Lu", "Lv", "Luan", "Lue", "Lun", "Luo", "Ma", "Mai",  
                       
                    
                     
                      



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