Asp.net網頁中實現截取等寬長度中英文字符串

    /// <summary>
    /// 截取等寬中英文字符串
    /// </summary>
    /// <param name="str">要截取的字符串</param>
    /// <param name="length">要截取的中文字符長度</param>
    /// <param name="appendStr">截取后后追加的字符串</param>
    /// <returns>截取后的字符串</returns>
    public static string CutStr(object str, int length, string appendStr)
    {
        if (str == null) return string.Empty;

        int len = length * 2;
        //aequilateLength為中英文等寬長度,cutLength為要截取的字符串長度
        int aequilateLength = 0, cutLength = 0;
        Encoding encoding = Encoding.GetEncoding("gb2312");

        string cutStr = str.ToString();
        int strLength = cutStr.Length;
        byte[] bytes;
        for (int i = 0; i < strLength; i++)
        {
            bytes = encoding.GetBytes(cutStr.Substring(i, 1));
            if (bytes.Length == 2)//不是英文
                aequilateLength += 2;
            else
                aequilateLength++;

            if (aequilateLength <= len) cutLength += 1;

            if (aequilateLength > len)
                return cutStr.Substring(0, cutLength) + appendStr;
        }
        return cutStr;
    }

網頁中要實現中英文長度一致,還需要設置等寬字體,不然截取的寬度也不准確.

body

{
font-size: 9pt;
font-family:'宋體','新宋體'; /*等寬字體*/
}