/// <summary>
    /// 指定字符串按指定长度进行剪切
    /// </summary>
    /// <param name="oldStr">需要截断的字符串</param>
    /// <param name="maxLength">字符串的最大长度</param>
    /// <param name="endWith">超过长度的后缀</param>
    /// <returns>如果超过长度,返回截断后新字符串加上后缀,否则返回原字符串</returns>
    public static string StringTruncate(string oldStr, int maxLength, string endWith)
    {
        if (string.IsNullOrEmpty(oldStr))
            //throw new NullRefferenceException("原字符串不能为空");
            return oldStr + endWith;
        if (maxLength < 1)
            throw new Exception("返回字符串的长度必须大于[0]");
        if (oldStr.Length > maxLength)
        {
            string strTmp = oldStr.Substring(0, maxLength);
            if (string.IsNullOrEmpty(endWith))
            {
                return strTmp;
            }
            else
                return strTmp + endWith;

        }
        return oldStr;

    }

 

title='<%#Eval("title") %>'><%#StringTruncate( Eval("title").ToString(),4,"...") %>