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

namespace ExtensionMethods
{
    public static class StringExtension
    {
        /// <summary>
        /// 四舍五入保留2位小数
        /// </summary>
        /// <param name="obj"></param>
        /// <returns></returns>
        public static decimal ToDecimalR(this string obj)
        {
            return Math.Round(obj.ToDecimal(), 2, MidpointRounding.AwayFromZero);
        }

        /// <summary>
        /// 四舍五入保留2位小数
        /// </summary>
        /// <param name="obj"></param>
        /// <returns></returns>
        public static decimal ToDecimalR(this object obj)
        {
            return Math.Round(obj.ToDecimal(), 2, MidpointRounding.AwayFromZero);
        }
        public static decimal ToDecimalR(this decimal obj)
        {
            return Math.Round(obj, 2, MidpointRounding.AwayFromZero);
        }

        public static decimal ToDecimal(this object obj)
        {
            if (obj == null)
                return 0;
            var str = obj.ToString().Trim();

            decimal result;
            decimal.TryParse(str, out result);

            return result;
        }


        public static decimal ToDecimal(this string obj)
        {
            decimal result;
            decimal.TryParse(obj.Trim(), out result);

            return result;
        }
    }
}