[转]得到汉字拼音首字母

// <summary> 
        /// 得到汉字拼音首字母 
        /// </summary> 
        /// <param name="chineseStr"></param> 
        /// <returns></returns> 
        public static string HZToPYSimple(string chineseStr) 
        { 
            try 
            { 
                byte[] b = System.Text.UnicodeEncoding.Default.GetBytes(chineseStr); 
                string res = ""; 
                for (int i = 0; i < b.Length; ) 
                { 
                    if (i == b.Length - 1) 
                    { 
                        if (char.IsNumber((char)b[i]) || char.IsLetter((char)b[i])) 
                            res += (char)b[i++]; 
                        else 
                        { 
                            i++; 
                            continue; 
                        } 
                    } 
                    else if (Convert.ToByte(b[i]) > 127)//汉字 
                    { 
                        string tmp = System.Text.UnicodeEncoding.Default.GetString(b, i, 2); 
                        tmp = HZToCode(tmp, "拼"); 
                        if (tmp.Length > 0) 
                            res += tmp[0]; 
                        i += 2; 
                    } 
                    else 
                    { 
                        if (char.IsNumber((char)b[i]) || char.IsLetter((char)b[i])) 
                            res += (char)b[i++]; 
                        else 
                        { 
                            i++; 
                            continue; 
                        } 
                    } 
                } 
                return res.ToUpper(); 
            } 
            catch (Exception ex) 
            { 
                throw new Exception("错误:", ex); 
            } 
        }

/// <summary> 
       /// 转换 
       /// </summary> 
       /// <param name="chineseStr"></param> 
       /// <param name="?"></param> 
       /// <returns></returns> 
       public static string HZToCode(string chineseStr,)//typeStr是指拼音还是五笔码 
       { 
           try 
           { 
               string resultStr = ""; 
               byte[] arrCN = Encoding.Default.GetBytes(chineseStr); 
               if (arrCN.Length > 1) 
               { 
                   int area = (short)arrCN[0]; 
                   int pos = (short)arrCN[1]; 
                   int code = (area << 8) + pos; 
                   int[] areacode = { 45217, 45253, 45761, 46318, 46826, 47010, 47297, 47614, 
                       48119, 48119, 49062, 49324, 49896, 50371, 50614, 50622, 50906, 51387, 
                       51446, 52218, 52698, 52698, 52698, 52980, 53689, 54481 }; 
                   for (int i = 0; i < 26; i++) 
                   { 
                       int max = 55290; 
                       if (i != 25) max = areacode[i + 1]; 
                       if (areacode[i] <= code && code < max) 
                       { 
                           resultStr = Encoding.Default.GetString(new byte[] { (byte)(65 + i) }); 
                           break; 
                       } 
                   } 
               }

               return resultStr; 
           } 
           catch (Exception ex) 
           { 
               throw new Exception("错误:", ex); 
           } 
       }