返回字符串的长度,区分中文和字母

//
        //判断此字符是否为中文
        //
        private bool Check_Chinese(char tmpchar)
        {
            bool bResult = false;
            int i = (int)tmpchar;

            if (i < 0x4E00 || i > 0x9fa5)
            {
                // return false;
            }
            else
            {
                bResult = true;
            }
            return bResult;
        }

        //
        //取得字符串的长度，一个中文=1，一个字母=0.5
        //
        public double Get_Count_From_String(string tmpStr)
        {
            double fl = 0;
            foreach (char c in tmpStr)
            {
                if (Check_Chinese(c) == true)
                {
                    fl = fl + 1;
                }
                else
                {
                    fl = fl + 0.5;
                }
            }

            return fl;
        }

        //
        //截取对应长度的字符串
        //
        public string Get_LenString(string tmpStr,int tmpLen)
        {
            double fl = 0;
            string sResult = "";
            if (tmpStr.Length >= tmpLen)
            {
                foreach (char c in tmpStr)
                {
                    sResult = sResult + c;
                    if (Check_Chinese(c) == true)
                    {
                        fl = fl + 1;
                    }
                    else
                    {
                        fl = fl + 0.5;
                    }
                    if (fl >= 4)
                    {
                        return sResult;
                    }
                }
            }

            return "";
        }