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81 lines
2.7 KiB
81 lines
2.7 KiB
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Text.RegularExpressions;
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namespace Utils.Datas
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{
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public class CharacterUtil
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{
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/// <summary>
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/// 得到每个汉字的字首拼音码字母(大写)
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/// </summary>
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/// <param name="chrStr">输入字符串</param>
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/// <returns>返回结果</returns>
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public static string GetHeadCharacter(string chrStr)
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{
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string strHeadString = string.Empty;
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Encoding gb = System.Text.Encoding.GetEncoding("gb2312");
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for (int i = 0; i < chrStr.Length; i++) {
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//检测该字符是否为汉字
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if (!IsChineseCharacters(chrStr.Substring(i, 1))) {
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strHeadString += chrStr.Substring(i, 1);
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continue;
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}
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byte[] bytes = gb.GetBytes(chrStr.Substring(i, 1));
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string lowCode = System.Convert.ToString(bytes[0] - 0xA0, 16);
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string hightCode = System.Convert.ToString(bytes[1] - 0xA0, 16);
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int nCode = Convert.ToUInt16(lowCode, 16) * 100 + Convert.ToUInt16(hightCode, 16);//得到区位码
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strHeadString += FirstLetter(nCode);
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}
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return strHeadString;
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}
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/// <summary>
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/// 判断是否为汉字
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/// </summary>
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/// <param name="chrStr">待检测字符串</param>
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/// <returns>是汉字返回true</returns>
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private static bool IsChineseCharacters(string chrStr)
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{
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Regex CheckStr = new Regex("[\u4e00-\u9fa5]");
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return CheckStr.IsMatch(chrStr);
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}
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/// <summary>
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/// 通过汉字区位码得到其首字母(大写)
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/// </summary>
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/// <param name="nCode">汉字编码</param>
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/// <returns></returns>
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private static string FirstLetter(int nCode)
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{
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if (nCode >= 1601 && nCode < 1637) return "A";
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if (nCode >= 1637 && nCode < 1833) return "B";
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if (nCode >= 1833 && nCode < 2078) return "C";
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if (nCode >= 2078 && nCode < 2274) return "D";
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if (nCode >= 2274 && nCode < 2302) return "E";
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if (nCode >= 2302 && nCode < 2433) return "F";
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if (nCode >= 2433 && nCode < 2594) return "G";
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if (nCode >= 2594 && nCode < 2787) return "H";
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if (nCode >= 2787 && nCode < 3106) return "J";
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if (nCode >= 3106 && nCode < 3212) return "K";
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if (nCode >= 3212 && nCode < 3472) return "L";
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if (nCode >= 3472 && nCode < 3635) return "M";
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if (nCode >= 3635 && nCode < 3722) return "N";
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if (nCode >= 3722 && nCode < 3730) return "O";
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if (nCode >= 3730 && nCode < 3858) return "P";
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if (nCode >= 3858 && nCode < 4027) return "Q";
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if (nCode >= 4027 && nCode < 4086) return "R";
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if (nCode >= 4086 && nCode < 4390) return "S";
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if (nCode >= 4390 && nCode < 4558) return "T";
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if (nCode >= 4558 && nCode < 4684) return "W";
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if (nCode >= 4684 && nCode < 4925) return "X";
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if (nCode >= 4925 && nCode < 5249) return "Y";
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if (nCode >= 5249 && nCode < 5590) return "Z";
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return "";
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}
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}
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}
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