/// <summary>

/// 获取指定汉字的首字母

/// </summary>

/// <param name="cnChar"></param>

/// <returns></returns>

public string GetSpell(string cnChar)

{

    var regex = new Regex(@"[^\u4e00-\u9fa5]");

    if (regex.IsMatch(cnChar))

        return cnChar;

    //将汉字转化为ASNI码,二进制序列

    var arrCn = Encoding.Default.GetBytes(cnChar);

    if (arrCn.Length > )

    {

        int area = (short)arrCn[];

        int pos = (short)arrCn[];

        var code = (area << ) + pos;

        int[] areacode =

        {

                , , , , , ,

                , , , , , ,

                , , , , , ,

                , , , , , , ,

            };

        for (var i = ; i < ; i++)

        {

            var max = ;

            if (i != ) max = areacode[i + ];

            if (areacode[i] <= code && code < max)

            {

                return Encoding.Default.GetString(new[] { (byte)( + i) });

            }

        }

        return "*";

    }

    else return cnChar;

}