C# 语言针对日期操作的方法的代码整理

最新推荐文章于 2022-11-19 09:45:04 发布

BryonWu

最新推荐文章于 2022-11-19 09:45:04 发布

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CC 4.0 BY-SA版权

文章标签： C# DateTime .NET

本文链接：https://blog.youkuaiyun.com/qq_34993599/article/details/80895244

本文提供了一系列日期处理的实用方法，包括判断闰年、获取指定日期所在年份的周数、根据年份和周数获取该周的起始及结束日期等。这些方法适用于多种应用场景，如日历显示、报表统计等。

/// <summary>
/// Creator:SE8,Date:Nov.22,2018
/// 判断年份是否是闰年
/// </summary>
/// <param name="TempYear">需要判断的年份</param>
/// <returns>返回判断的结果，True或False</returns>
public bool ISLeapYear(Int32 TempYear)
{
if (((TempYear % 400).Equals(0) && !(TempYear % 3200).Equals(0)) || ((TempYear % 4).Equals(0) && !(TempYear % (100)).Equals(0)) || ((TempYear % 3200).Equals(0) && (TempYear % 172800).Equals(0)))
return true;
else
return false;
}

/// <summary>
/// Creator:SE8,Date:June.14,2018
/// 得到指定日期在年中的第几周
/// </summary>
/// <param name="TempDateTime">指定的日期</param>
/// <returns>返回得到的周</returns>
public int WeekOfYear(DateTime TempDateTime)
{
var TempFirstDayOfWeek = Convert.ToInt32(Convert.ToDateTime(TempDateTime.Year.ToString(CultureInfo.InvariantCulture)+"-1-1").DayOfWeek);
var TempDays = TempDateTime.DayOfYear;
var TempDaysOutOneWeek = TempDays - (7 - TempFirstDayOfWeek);
if (TempDaysOutOneWeek<=0)
{
return 1;
}
var TempWeeks = TempDaysOutOneWeek / 7;
if (TempDaysOutOneWeek%7!=0)
{
TempWeeks++;
}
return TempWeeks + 1;
}

/// <summary>
/// Creator:SE8,Date:June.14,2018
/// 得到指定年份与周的开始时间
/// </summary>
/// <param name="TempYear">指定年</param>
/// <param name="TempWeek">指定周</param>
/// <returns>返回指定年份、周的周一日期</returns>
public DateTime GetWeekStartTime(Int32 TempYear, Int32 TempWeek)
{
var TempDateTime = new DateTime(TempYear, 1, 1);
DateTime TempStartTime = TempDateTime.AddDays(7 * TempWeek);
return TempStartTime.AddDays(-(Int32)TempStartTime.DayOfWeek+(Int32)DayOfWeek.Monday);
}

/// <summary>
/// Creator:SE8,Date:June.14,2018
/// 得到指定年份与周的结束时间
/// </summary>
/// <param name="TempYear">指定年</param>
/// <param name="TempWeek">指定周</param>
/// <returns>返回指定年份、周的周日日期</returns>
public DateTime GetWeekEndTime(Int32 TempYear, Int32 TempWeek)
{
var TempDateTime = new DateTime(TempYear, 1, 1);
DateTime TempEndTime = TempDateTime.AddDays(7 * TempWeek);
return TempEndTime.AddDays(6);

}