根据汉字获取其的首个字母

在编程中我们会遇到这样的功能:

根据关键词的首字母来获取数据,其解决办法下面介绍如何获取汉字的首个字母:

得到数据: DataTable ds = bll.GetLists3(0, channel_id);

复制得到的列表:DataTable dt = ds.Copy();

删除复制表的数据仅保留表的结构:dt.Clear();

以下为GetChineseSpell()方法获取首字母:

   //获取首字母
        public string GetChineseSpell(string strText)
        {
            int len = strText.Length;
            string myStr = "";
            for (int i = 0; i < len; i++)
            {
                myStr += getSpell(strText.Substring(i, 1));
            }
            return myStr;
        }

        public string getSpell(string cnChar)
        {
            byte[] arrCN = Encoding.Default.GetBytes(cnChar);
            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)
                    {
                        return Encoding.Default.GetString(new byte[] { (byte)(65 + i) });
                    }
                }
                return "*";
            }
            else return cnChar;
        }

得到符合的数据并复制到新表:

 foreach (DataRow item in ds.Rows)
                {
                 if(school_zimu== GetChineseSpell(item["name"].ToString().Substring(0, 1))){
                  dt.ImportRow(item);
                 }

 

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