using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Reflection;
using System.Text;

namespace LiveForum.Code.Utility
{
    public static class Convert
    {
        public static long tolong(this object obj)
        {
            long tmp = 0;
            long.TryParse(obj.tostr(), out tmp);
            return tmp;
        }
        public static decimal todec(this object obj)
        {
            decimal tmp = 0;
            decimal.TryParse(obj.tostr(), out tmp);
            return tmp;
        }
        public static string tostr(this object obj)
        {
            if (obj == null)
                return string.Empty;
            return obj.ToString();
        }

        public static string tostrnotempty(this object obj, string defaultrStr = "")
        {
            if (obj == null)
                return defaultrStr;
            if (string.IsNullOrEmpty(obj.ToString()))
            {
                return defaultrStr;
            }
            return obj.ToString();
        }
        public static byte[] strToutf8Byte(this String obj)
        {
            var objstr = obj.tostr();
            return Encoding.UTF8.GetBytes(objstr);
        }
        public static string utf8ByteTostr(this byte[] obj)
        {
            return Encoding.UTF8.GetString(obj);
        }
        /// <summary>
        /// 获取首字母(TODO:待实现拼音功能)
        /// </summary>
        /// <param name="obj"></param>
        /// <returns></returns>
        public static string toSpell(this object obj)
        {
            return obj.tostr();
        }

        public static DateTime? toDateTime(this string str)
        {
            try
            {
                return System.Convert.ToDateTime(str);
            }
            catch (Exception)
            {

                return null;
            }
        }
        public static double? todouble(this string str)
        {
            try
            {
                return System.Convert.ToDouble(str);
            }
            catch (Exception)
            {

                return null;
            }
        }


        public static short? toshort(this string str)
        {
            try
            {
                return System.Convert.ToInt16(str);
            }
            catch (Exception)
            {

                return null;
            }
        }

        public static int toint(this string str, int defaultInt = 0)
        {
            try
            {
                return System.Convert.ToInt32(str);
            }
            catch (Exception)
            {

                return defaultInt;
            }
        }

        public static bool? tobool(this string str)
        {
            try
            {
                return System.Convert.ToBoolean(str);
            }
            catch (Exception)
            {

                return null;
            }
        }



    }
}