C# 汉字转拼音(全拼和首字母)实例

（一）将汉字转化成全拼
代码：

    private void button1_click(object sender, eventargs e)
    {
        this.textbox2.text = hz2py.convert(this.textbox1.text);
    }

汉字转拼音类：

   /// <summary>
    /// 汉字转拼音类
    /// </summary>
    public class hz2py
    {
        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","man","mang","mao","me","mei","men","meng","mi","mian",
                "miao","mie","min","ming","miu","mo","mou","mu","na","nai","nan","nang",
                "nao","ne","nei","nen","neng","ni","nian","niang","niao","nie","nin","ning",
                "niu","nong","nu","nv","nuan","nue","nuo","o","ou","pa","pai","pan",
                "pang","pao","pei","pen","peng","pi","pian","piao","pie","pin","ping","po",
                "pu","qi","qia","qian","qiang","qiao","qie","qin","qing","qiong","qiu","qu",
                "quan","que","qun","ran","rang","rao","re","ren","reng","ri","rong","rou",
                "ru","ruan","rui","run","ruo","sa","sai","san","sang","sao","se","sen",
                "seng","sha","shai","shan","shang","shao","she","shen","sheng","shi","shou","shu",
                "shua","shuai","shuan","shuang","shui","shun","shuo","si","song","sou","su","suan",
                "sui","sun","suo","ta","tai","tan","tang","tao","te","teng","ti","tian",
                "tiao","tie","ting","tong","tou","tu","tuan","tui","tun","tuo","wa","wai",
                "wan","wang","wei","wen","weng","wo","wu","xi","xia","xian","xiang","xiao",
                "xie","xin","xing","xiong","xiu","xu","xuan","xue","xun","ya","yan","yang",
                "yao","ye","yi","yin","ying","yo","yong","you","yu","yuan","yue","yun",
                "za", "zai","zan","zang","zao","ze","zei","zen","zeng","zha","zhai","zhan",
                "zhang","zhao","zhe","zhen","zheng","zhi","zhong","zhou","zhu","zhua","zhuai","zhuan",
                "zhuang","zhui","zhun","zhuo","zi","zong","zou","zu","zuan","zui","zun","zuo"
                };

        /// <summary>
        /// 把汉字转换成拼音(全拼)
        /// </summary>
        /// <param name="hzstring">汉字字符串</param>
        /// <returns>转换后的拼音(全拼)字符串</returns>
        public static string convert(string hzstring)
        {
            // 匹配中文字符
            regex regex = new regex("^[\u4e00-\u9fa5]$");
            byte[] array = new byte[2];
            string pystring = "";
            int chrasc = 0;
            int i1 = 0;
            int i2 = 0;
            char[] nowchar = hzstring.tochararray();

            for (int j = 0; j < nowchar.length; j++)
            {
                // 中文字符
                if (regex.ismatch(nowchar[j].tostring()))
                {
                    array = system.text.encoding.default.getbytes(nowchar[j].tostring());
                    i1 = (short)(array[0]);
                    i2 = (short)(array[1]);
                    chrasc = i1 * 256 + i2 - 65536;
                    if (chrasc > 0 && chrasc < 160)
                    {
                        pystring += nowchar[j];
                    }
                    else
                    {
                        // 修正部分文字
                        if (chrasc == -9254)  // 修正“圳”字
                            pystring += "zhen";
                        else
                        {
                            for (int i = (pyvalue.length - 1); i >= 0; i--)
                            {
                                if (pyvalue[i] <= chrasc)
                                {
                                    pystring += pyname[i];
                                    break;
                                }
                            }
                        }
                    }
                }
                // 非中文字符
                else
                {
                    pystring += nowchar[j].tostring();
                }
            }
            return pystring;
        }
    }

补充：一些生僻字转不了，比如：“睿”和“罡”字等。

（二）将汉字转化成首字母序列

///   <summary>
        ///   得到一个汉字的拼音第一个字母，如果是一个英文字母则直接返回大写字母
        ///   </summary>
        ///   <param   name="cnchar">单个汉字</param>
        ///   <returns>单个大写字母</returns>
        private static string getcharspellcode(string cnchar)
        {
            long icnchar;

            byte[] zw = system.text.encoding.default.getbytes(cnchar);

            //如果是字母，则直接返回
            if (zw.length == 1)
            {
                return cnchar.toupper();
            }
            else
            {
                //   get   the     array   of   byte   from   the   single   char   
                int i1 = (short)(zw[0]);
                int i2 = (short)(zw[1]);
                icnchar = i1 * 256 + i2;
            }
            #region table   of   the   constant   list
            //expresstion
            //table   of   the   constant   list
            // 'a';           //45217..45252
            // 'b';           //45253..45760
            // 'c';           //45761..46317
            // 'd';           //46318..46825
            // 'e';           //46826..47009
            // 'f';           //47010..47296
            // 'g';           //47297..47613

            // 'h';           //47614..48118
            // 'j';           //48119..49061
            // 'k';           //49062..49323
            // 'l';           //49324..49895
            // 'm';           //49896..50370
            // 'n';           //50371..50613
            // 'o';           //50614..50621
            // 'p';           //50622..50905
            // 'q';           //50906..51386

            // 'r';           //51387..51445
            // 's';           //51446..52217
            // 't';           //52218..52697
            //没有u,v
            // 'w';           //52698..52979
            // 'x';           //52980..53640
            // 'y';           //53689..54480
            // 'z';           //54481..55289
            #endregion
            //   icnchar match     the   constant
            if ((icnchar >= 45217) && (icnchar <= 45252))
            {
                return "a";
            }
            else if ((icnchar >= 45253) && (icnchar <= 45760))
            {
                return "b";
            }
            else if ((icnchar >= 45761) && (icnchar <= 46317))
            {
                return "c";
            }
            else if ((icnchar >= 46318) && (icnchar <= 46825))
            {
                return "d";
            }
            else if ((icnchar >= 46826) && (icnchar <= 47009))
            {
                return "e";
            }
            else if ((icnchar >= 47010) && (icnchar <= 47296))
            {
                return "f";
            }
            else if ((icnchar >= 47297) && (icnchar <= 47613))
            {
                return "g";
            }
            else if ((icnchar >= 47614) && (icnchar <= 48118))
            {
                return "h";
            }
            else if ((icnchar >= 48119) && (icnchar <= 49061))
            {
                return "j";
            }
            else if ((icnchar >= 49062) && (icnchar <= 49323))
            {
                return "k";
            }
            else if ((icnchar >= 49324) && (icnchar <= 49895))
            {
                return "l";
            }
            else if ((icnchar >= 49896) && (icnchar <= 50370))
            {
                return "m";
            }

            else if ((icnchar >= 50371) && (icnchar <= 50613))
            {
                return "n";
            }
            else if ((icnchar >= 50614) && (icnchar <= 50621))
            {
                return "o";
            }
            else if ((icnchar >= 50622) && (icnchar <= 50905))
            {
                return "p";
            }
            else if ((icnchar >= 50906) && (icnchar <= .51386))
            {
                return "q";
            }
            else if ((icnchar >= 51387) && (icnchar <= 51445))
            {
                return "r";
            }
            else if ((icnchar >= 51446) && (icnchar <= 52217))
            {
                return "s";
            }
            else if ((icnchar >= 52218) && (icnchar <= 52697))
            {
                return "t";
            }
            else if ((icnchar >= 52698) && (icnchar <= 52979))
            {
                return "w";
            }
            else if ((icnchar >= 52980) && (icnchar <= 53640))
            {
                return "x";
            }
            else if ((icnchar >= 53689) && (icnchar <= 54480))
            {
                return "y";
            }
            else if ((icnchar >= 54481) && (icnchar <= 55289))
            {
                return "z";
            }
            else return ("?");
        }