using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace NCC.Code
{
    /// <summary>
    /// 强制转化辅助类(无异常抛出)
    /// </summary>
    public static class ConvertHelper
    {
        #region 强制转化
        /// <summary>
        /// object转化为Bool类型
        /// </summary>
        /// <param name="obj"></param>
        /// <returns></returns>
        public static bool ObjToBool(this object obj)
        {
            bool flag;
            if (obj == null)
            {
                return false;
            }
            if (obj.Equals(DBNull.Value))
            {
                return false;
            }
            return (bool.TryParse(obj.ToString(), out flag) && flag);
        }
        /// <summary>
        /// object强制转化为DateTime类型(吃掉异常)
        /// </summary>
        /// <param name="obj"></param>
        /// <returns></returns>
        public static DateTime? ObjToDateNull(this object obj)
        {
            if (obj == null)
            {
                return null;
            }
            try
            {
                return new DateTime?(Convert.ToDateTime(obj));
            }
            catch (ArgumentNullException ex)
            {
                return null;
            }
        }
        /// <summary>
        /// int强制转化
        /// </summary>
        /// <param name="obj"></param>
        /// <returns></returns>
        public static int ObjToInt(this object obj)
        {
            try
            {
                if (obj != null)
                {
                    int num;
                    if (obj.Equals(DBNull.Value))
                    {
                        return 0;
                    }
                    if (int.TryParse(obj.ToString(), out num))
                    {
                        return num;
                    }
                }
            }
            catch (Exception)
            {

            }
            return 0;
        }
        /// <summary>
        /// 强制转化为long
        /// </summary>
        /// <param name="obj"></param>
        /// <returns></returns>
        public static long ObjToLong(this object obj)
        {
            if (obj != null)
            {
                long num;
                if (obj.Equals(DBNull.Value))
                {
                    return 0;
                }
                if (long.TryParse(obj.ToString(), out num))
                {
                    return num;
                }
            }
            return 0;
        }
        /// <summary>
        /// 强制转化可空int类型
        /// </summary>
        /// <param name="obj"></param>
        /// <returns></returns>
        public static int? ObjToIntNull(this object obj)
        {
            if (obj == null)
            {
                return null;
            }
            if (obj.Equals(DBNull.Value))
            {
                return null;
            }
            return new int?(ObjToInt(obj));
        }
        /// <summary>
        /// 强制转化为string
        /// </summary>
        /// <param name="obj"></param>
        /// <returns></returns>
        public static string ObjToStr(this object obj)
        {
            if (obj == null)
            {
                return "";
            }
            if (obj.Equals(DBNull.Value))
            {
                return "";
            }
            return Convert.ToString(obj);
        }
        /// <summary>
        /// Decimal转化
        /// </summary>
        /// <param name="obj"></param>
        /// <returns></returns>
        public static decimal ObjToDecimal(this object obj)
        {
            if (obj == null)
            {
                return 0M;
            }
            if (obj.Equals(DBNull.Value))
            {
                return 0M;
            }
            try
            {
                return Convert.ToDecimal(obj);
            }
            catch
            {
                return 0M;
            }
        }
        /// <summary>
        /// Decimal可空类型转化
        /// </summary>
        /// <param name="obj"></param>
        /// <returns></returns>
        public static decimal? ObjToDecimalNull(this object obj)
        {
            if (obj == null)
            {
                return null;
            }
            if (obj.Equals(DBNull.Value))
            {
                return null;
            }
            return new decimal?(ObjToDecimal(obj));
        }

        /// <summary>
        /// 获取时间对应的周（中文）
        /// </summary>
        /// <param name="obj"></param>
        /// <returns></returns>
        public static string DateTimeToWeekCN(this DateTime obj)
        {
            if (obj == null)
            {
                return null;
            }
            try
            {
                string[] Day = new string[] { "星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六" };
                string week = Day[Convert.ToInt32(DateTime.Now.DayOfWeek.ToString("d"))].ToString();
                return week;
            }
            catch (Exception)
            {
                return "未知";
            }
        }


        #endregion

    }
}