是否有.NET方法来存储像我的自定义类的时间段？

Question

是否有一个处理这种时间跨度的本机.NET类？我一直无法找到一个。

是否有一个接近？

Public Class Period 

    Property FromDate As Date 
    Property ToDate As Date 

    Public Sub New(ByVal fromDate As Date, ByVal toDate As Date) 

     If fromDate > toDate Then 
      Throw New ArgumentException("fromDate must be less than Or equal toDate") 
     End If 

     _FromDate = fromDate 
     _ToDate = toDate 

    End Sub 

    Public Overloads Shared Operator =(ByVal period1 As Period, 
             ByVal period2 As Period) As Boolean 

     Return period1.FromDate = period2.FromDate AndAlso 
       period1.ToDate = period2.ToDate 

    End Operator 

    Public Overloads Shared Operator <>(ByVal period1 As Period, 
             ByVal period2 As Period) As Boolean 

     Return Not period1 = period2 

    End Operator 

    Public Overloads Shared Operator <(ByVal period1 As Period, 
             ByVal period2 As Period) As Boolean 

     Return period1.FromDate < period2.FromDate 

    End Operator 

    Public Overloads Shared Operator >(ByVal period1 As Period, 
            ByVal period2 As Period) As Boolean 

     Return period1.FromDate > period2.FromDate 

    End Operator 

    Public Overloads Shared Operator >=(ByVal period1 As Period, 
           ByVal period2 As Period) As Boolean 

     Return period1.FromDate >= period2.FromDate 

    End Operator 

    Public Overloads Shared Operator <=(ByVal period1 As Period, 
             ByVal period2 As Period) As Boolean 

     Return period1.FromDate <= period2.FromDate 

    End Operator 

    Public Function Contains(ByVal checkDate As Date) As Boolean 

     Return checkDate >= Me.FromDate AndAlso 
       checkDate < Me.ToDate 

    End Function 

    Public Overrides Function ToString() As String 
     Return Format(_FromDate, "MMM-yyyy") & "-" & Format(_ToDate, "MMM-yyyy")    
    End Function 

End Class 

和派生月期间：

Public Class MonthPeriod : Inherits Period 

    Private _MonthStartDate As Date 

    Public Sub New(ByVal dateInMonth As Date) 

     'Everything >= the 1st of the month to < the 1st of the next month 
     MyBase.New(New Date(dateInMonth.Year, dateInMonth.Month, 1), 
        New Date(dateInMonth.Year, dateInMonth.Month, 1).AddMonths(1)) 

     _MonthStartDate = New Date(dateInMonth.Year, dateInMonth.Month, 1) 

    End Sub 

    Public Overrides Function ToString() As String 
     Return Format(_MonthStartDate, "MMM-yyyy") 
    End Function 

End Class 

Answer 1

简短回答：我不认为有任何内置类与此接近。可能最接近的是TimeSpan，但这只是一个没有绝对开始或结束日期概念的相对跨度。

Answer 2

我没看过所有的代码。您的实现可能提供更多功能，但.Net Framework实现称为TimeSpan。

它在System命名空间中。

http://msdn.microsoft.com/en-us/library/system.timespan(v=VS.90).aspx

时间跨度限制为天作为最大的单位。即在数月或数年内没有测量。如果需要，它可以延长。

Answer 3

使用.NET标准TimeSpan。如有必要，创建一个继承TimeSpan的新类，但根据需要添加新方法。