QiFeng.ZWY.Utility/TimeHelper.cs

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using System;
using System.Collections.Generic;
using System.ComponentModel;

namespace QiFeng.LMSD.Utility
{
    /// <summary>
    /// 时间帮助类
    /// </summary>
    public static class TimeHelper
    {
        /// <summary>
        /// 根据时间间隔类型获取时间段
        /// </summary>
        /// <param name="timeSpanType">时间间隔类型</param>
        /// <param name="timeSpanValue">间隔值</param>
        /// <returns>返回开始时间及结束时间（0位开始时间  1为结束时间）</returns>
        public static List<DateTime> GetTimeRangeByTimeSpanType(TimeSpanType timeSpanType, int timeSpanValue)
        {
            var result = new List<DateTime>();
            var now = DateTime.Parse(DateTime.Now.ToString("yyyy-MM-dd 23:59:59"));
            timeSpanValue--;
            switch (timeSpanType)
            {
                case TimeSpanType.Day:
                    result.Add(DateTime.Parse(now.AddDays(0 - timeSpanValue).ToShortDateString()));
                    result.Add(now);
                    break;
                case TimeSpanType.Week:
                    var week = (int)now.DayOfWeek;
                    if (week == 0)
                    {
                        week = 7;
                    }
                    result.Add(DateTime.Parse(now.AddDays(0 - (week - 1) - 7 * timeSpanValue).ToShortDateString()));
                    result.Add(now.AddDays(7 - week));
                    break;
                case TimeSpanType.Month: 
                    result.Add(DateTime.Parse(now.AddMonths(0 - timeSpanValue).ToString("yyyy-MM-01")));
                    var days = DateTime.DaysInMonth(now.Year, now.Month);
                    result.Add(DateTime.Parse(now.ToString("yyyy-MM-" + days + " 23:59:59")));
                    break;
                case TimeSpanType.Year:
                    result.Add(DateTime.Parse(now.AddYears(0 - timeSpanValue).ToString("yyyy-01-01")));
                    result.Add(DateTime.Parse(now.ToString("yyyy-12-31 23:59:59")));
                    break;
            }
            return result;
        }

        /// <summary>        
        /// 时间戳转为C#格式时间        
        /// </summary>        
        /// <param name=”timeStamp”>时间戳(单位：毫秒)</param>        
        /// <returns></returns>        
        public static DateTime ConvertStringToDateTime(string timeStamp)
        {
            DateTime dtStart = TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(1970, 1, 1));
            long lTime = long.Parse(timeStamp + "0000");
            TimeSpan toNow = new TimeSpan(lTime);