提问人:Calibre2010 提问时间:6/27/2023 最后编辑:Rand RandomCalibre2010 更新时间:6/27/2023 访问量:75
如何在 2 个日期之间创建具有 30 分钟开始/结束时间的日期数组?
how do i create an array of dates with 30 minute start / end times between 2 dates?
问:
我有两个日期,2023 年 1 月 1 日:12.00.00 作为开始,以及 2023 年 3 月 3 日:12.00.00
例如,我想在这两个日期之间创建一个日期列表,其中包含半小时的开始/结束时间段 1/1/2023:12.00.00 - 1/1/2023:12.30.00 1/1/2023:12.30.00 - 1/1/2023:13.00.00 一直到 2023/3/3:12.00.00
有没有人知道在 c# 中做到这一点的好方法?
提前致谢
答:
0赞
Mathias R. Jessen
6/27/2023
#1
继续调用 AddMinutes()
以获取下一个值:
var dateTimeValues = new List<DateTime>();
var startDate = new DateTime(2023, 1, 1);
var endDate = new DateTime(2023, 1, 3);
var currentDateTime = startDate;
while ((currentDateTime = currentDateTime.AddMinutes(30)) <= endDate) {
dateTimeValues.Add(currentDateTime);
}
评论
0赞
Rand Random
6/27/2023
吹毛求疵:“如何创建数组...”(没关系......在问题正文中,OP 提到列表而不是数组)
0赞
Power Mouse
6/27/2023
#2
liq 和 Enumerable 方法:
var startDate = new DateTime(2023,1,1, 12,00,00);
var endDate = new DateTime(2023,3,3, 12,00,00);
var dates = Enumerable.Range(0, int.MaxValue)
.Select(multiplier => startDate.Add(TimeSpan.FromMinutes(30 * multiplier)))
.TakeWhile(span => span <= endDate);
dates.Dump();
另一种方式 - 清洁剂:
int chunks = (int)(endDate - startDate).TotalMinutes / 30;
var rez = Enumerable.Range(0, chunks + 1)
.Select(p => startDate.AddMinutes(30 * p));
2赞
Daniel127
6/27/2023
#3
您可以将其作为函数来将其作为 IEnumerable 进行管理
public IEnumerable<DateTime> GetDates(DateTime startDate, DateTime endDate, TimeSpan interval)
{
var currentDateTime = startDate;
while (currentDateTime < endDate)
{
yield return currentDateTime;
currentDateTime = currentDateTime.Add(interval);
}
yield return endDate;
}
并使用它
var dates = GetDates(new DateTime(2023, 1, 1), new DateTime(2023, 1, 3), TimeSpan.FromMinutes(30));
1赞
sommmen
6/27/2023
#4
为此,我有以下扩展方法;
/// <summary>
/// Extensions for dealing with <see cref="DateTime"/>
/// </summary>
public static class DateTimeExtensions
{
#region Range
private static readonly Func<DateTime, DateTime> DayStep = x => x.AddDays(1);
private static readonly Func<DateTime, DateTime> MonthStep = x => x.AddMonths(1);
private static readonly Func<DateTime, DateTime> YearStep = x => x.AddYears(1);
/// <summary>
/// Adapted from <see href="https://stackoverflow.com/a/39847791/4122889"/>
/// <example>
/// // same result
/// var fromToday = birthday.RangeFrom(today);
/// var toBirthday = today.RangeTo(birthday);
/// </example>
/// </summary>
/// <param name="from"></param>
/// <param name="to"></param>
/// <param name="step"></param>
/// <returns></returns>
public static IEnumerable<DateTime> RangeTo(this DateTime from, DateTime to, Func<DateTime, DateTime>? step = null)
{
step ??= DayStep;
while (from < to)
{
yield return from;
from = step(from);
}
}
public static IEnumerable<DateTime> RangeToMonthly(this DateTime from, DateTime to)
=> RangeTo(from, to, MonthStep);
public static IEnumerable<DateTime> RangeToYearly(this DateTime from, DateTime to)
=> RangeTo(from, to, YearStep);
public static IEnumerable<DateTime> RangeFrom(this DateTime to, DateTime from, Func<DateTime, DateTime>? step = null)
=> from.RangeTo(to, step);
#endregion
}
用法;
DateTime.UtcNow.RangeTo(DateTime.UtcNow.AddDays(1), x => x.AddMinutes(30)).ToList()
06/27/2023 12:31:36
06/27/2023 13:01:36
06/27/2023 13:31:36
06/27/2023 14:01:36
06/27/2023 14:31:36
...
评论
0赞
Rand Random
6/27/2023
恕我直言,函数的开销似乎是不必要的,只需传递一个时间跨度或一个 int。
0赞
Hans Kesting
6/27/2023
#5
您甚至可以使用简单的 -loop:for
TimeSpan interval = TimeSpan.FromMinutes(30);
for (var dt=new DateTime(2023,1,1); dt<new DateTime(2023,3,3); dt = dt.Add(interval))
{
Console.WriteLine($"{dt:yyyy-MM-dd HH:mm} - {dt.Add(interval):yyyy-MM-dd HH:mm}");
}
如果要包含当天的日期范围,则可能需要在结束日期上添加 1 天。
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