object转成int?值

2014-12-31 18:37:31 访问(1779) 赞(0) 踩(0)


        /// <summary>
        /// object转成int?值
        /// </summary>
        /// <param name="obj"></param>
        /// <returns></returns>
        public int? IntNullConvertTo(object obj)
        {

            if (obj is int)
                return (int)obj;

            if (obj == null)
                return null;

            string str = obj.ToString();

            if (str.Length == 0)
                return null;

            int theResult = int.MinValue;

            if (int.TryParse(str, out theResult))
                return theResult;

            throw new Exception
                    (
                        "方法："
                        + MethodBase.GetCurrentMethod().ReflectedType.FullName
                        + " "
                        + MethodBase.GetCurrentMethod().ToString()
                        + " 发生异常："
                        + "obj == " + str + " 不是有效的整型值。"
                    );

        }