yyyyMMdd形式转成DateTime

2014-12-31 15:56:40 访问(1361) 赞(0) 踩(0)

      
        /// <summary>
        /// yyyyMMdd形式转成DateTime
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public DateTime yyyyMMddToDateTime
            (
                string str
            )
        {
            if (str == null || str.Length == 0)
            {
                throw new Exception
                   (
                       "方法："
                       + MethodBase.GetCurrentMethod().ReflectedType.FullName
                       + " "
                       + MethodBase.GetCurrentMethod().ToString()
                       + " 发生异常："
                       + "str == null || str.Length == 0"
                   );
            }

            int iLen = str.Length;

            if (iLen != 8)
            {
                throw new Exception
                   (
                       "方法："
                       + MethodBase.GetCurrentMethod().ReflectedType.FullName
                       + " "
                       + MethodBase.GetCurrentMethod().ToString()
                       + " 发生异常："
                       + "str.Length != 8"
                   );
            }

            string dateStr = str.Substring(0, 4) + "-" + str.Substring(4, 2) + "-" + str.Substring(6, 2);

            return DateTime.Parse(dateStr);
        }