获得字符串长度

　 /// <summary>
    /// 获得字符串长度
    /// </summary>
    /// <param name="str">要获得长度的字符串</param>
    /// <returns></returns>
    public static int GetLengthOfStr(string str)
    {
        int lenTotal = 0;
        int n = str.Length;
        string strWord = "";

        int asc;
        for (int i = 0; i < n; i++)
        {
            strWord = str.Substring(i, 1);
            asc = Convert.ToChar(strWord);
            if (asc < 0 || asc > 127)
                lenTotal = lenTotal + 3;
            else
                lenTotal = lenTotal + 1;
        }
        return lenTotal;
    }