vb.net - Vb.net - 日期：如何获取一天的开始时间和结束时间

Question

我们如何在 vb.net 中实现这一点：获取一天的开始时间和一天的结束时间

例如

Start DateTime: 05-Nov-2013 00:00:00
End DateTime: 05-Nov-2013 23:59:99

问候

Answer 1

您可以TimeSpan像这样将 a 添加到日期值：

Dim dateValue As DateTime = DateTime.Now

Dim startTime As DateTime = dateValue.Date + New TimeSpan(0, 0, 0) 'timespan addition not actually needed here
Dim endTime As DateTime = dateValue.Date + New TimeSpan(23, 59, 59)

Answer 2

Dim start As DateTime = yourDate.Date
Dim endTime As DateTime = yourDate.Date.AddDays(1).AddSeconds(-1)

Answer 3

我的 $.02

    Dim someDate As DateTime = DateTime.Now
    Dim StartDateTime As DateTime = someDate.Date
    'last measurable instant for a given date
    Dim EndDateTime As DateTime = someDate.Date.Add(New TimeSpan(TimeSpan.TicksPerDay - 1))