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using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Reflection;
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namespace iWareCommon.Utils
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{
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/// <summary>
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/// 日期处理类
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/// </summary>
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public class DateTimeHelper
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{
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/// <summary>
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/// 返回NULL
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/// </summary>
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/// <returns></returns>
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public static DateTime? GetNull()
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{
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return null;
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}
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/// <summary>
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/// 计算两个时间的时间差，返回秒数
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/// </summary>
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/// <param name="startTime"></param>
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/// <param name="endTime"></param>
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/// <param name="msg"></param>
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/// <returns></returns>
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public static int GetTimeDiffer(DateTime? startTime, DateTime? endTime, ref string msg)
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{
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if (startTime == null || endTime == null)
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{
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return 0;
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}
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TimeSpan ts = ((DateTime)endTime - (DateTime)startTime);
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msg = "";
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if (ts.Days != 0)
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{
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msg += ts.Days + "天";
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}
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if (ts.Hours != 0)
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{
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msg += ts.Hours + "小时";
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}
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if (ts.Minutes != 0)
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{
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msg += ts.Minutes + "分钟";
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}
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if (ts.Seconds != 0)
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{
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msg += ts.Seconds + "秒";
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}
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return (int)ts.TotalSeconds;
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}
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/// <summary>
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/// 转换日期格式为字符串
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/// </summary>
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/// <typeparam name="T"></typeparam>
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/// <returns></returns>
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public static string ConvertToString(DateTime? dt)
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{
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if (dt == null)
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{
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return string.Empty;
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}
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return Convert.ToDateTime(dt).ToString("yyyy-MM-dd HH:mm:ss");
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}
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/// <summary>
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/// 转换日期格式为字符串
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/// </summary>
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/// <typeparam name="T"></typeparam>
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/// <returns></returns>
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public static string ConvertToStringForOnlyShowTime(DateTime? dt)
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{
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if (dt == null)
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{
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return string.Empty;
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}
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return Convert.ToDateTime(dt).ToString("HH:mm:ss");
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}
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}
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}
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