C# 获取汉字拼音的首写字母

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 1 /// <summary>
 2     /// 获取单个汉字的首写拼音字母
 3     /// </summary>
 4     /// <param name="cn"></param>
 5     /// <returns></returns>
 6     public static string getSpell(string cn)
 7     {
 8         #region
 9         byte[] arrCN = Encoding.Default.GetBytes(cn);
10         if (arrCN.Length > 1)
11         {
12             int area = (short)arrCN[0];
13             int pos = (short)arrCN[1];
14             int code = (area << 8) + pos;
15             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 };
16             for (int i = 0; i < 26; i++)
17             {
18                 int max = 55290;
19                 if (i != 25) max = areacode[i + 1];
20                 if (areacode[i] <= code && code < max)
21                 {
22                     return Encoding.Default.GetString(new byte[] { (byte)(65 + i) });
23                 }
24             }
25             return cn;
26         }
27         else return cn;
28         #endregion
29     }
30 
31     /// <summary>
32     /// 获取汉字字符串的首写英文字母
33     /// </summary>
34     /// <param name="str"></param>
35     /// <returns></returns>
36     public static string GetStringSpell(string str)
37     {
38         char[] chars = str.ToCharArray();
39         string result = "";
40         if (chars.Length > 1)
41         {
42             for (int i = 0; i < chars.Length; i++)
43             {
44                 result += getSpell(chars[i].ToString());
45             }
46         }
47         else if (chars.Length == 1)
48         {
49             result = getSpell(str);
50         }
51 
52         return result.ToLower();
53 
54