我有一个课,看起来像这样:
Public Class DataPoint
Private _data As Integer
Private _locInText As Integer
Private _searchValue As String
Property Data As Integer
Get
Return _data
End Get
Set(value As Integer)
_data = value
End Set
End Property
Property LocInText As Integer
Get
Return _locInText
End Get
Set(value As Integer)
_locInText = value
End Set
End Property
Property SearchValue As String
Get
Return _searchValue
End Get
Set(value As String)
_searchValue = value
End Set
End Property
End Class
然后我使用这个类创建另一个类。
Public Class PaintData
Public Time As TimeSpan
Public Color As DataPoint
Public Job As New DataPoint
Public MaxCurrent As New DataPoint
End Class
我想创建一些属性的默认值,namly SearchValue
和LocInText
。对我来说,在类定义中这样做是有意义的,因为它们本质上是常量。
Q1。我应该这样做吗?如果没有,那么适当的技术是什么。
Q2。我无法正确理解语法。你能帮忙吗?
Public Class PaintData
Public Time As TimeSpan
Public Color As DataPoint
Public Job As New DataPoint
Public MaxCurrent As New DataPoint
Color.LocInText = 4 '<----Declaration expected failure because I'm not in a method
Job.LocInText = 5 '<----Declaration expected failure because I'm not in a method
End Class
全部谢谢
答案 0 :(得分:4)
给DataPoint
一个构造函数:
Public Class DataPoint
Private _data As Integer
Private _locInText As Integer
Private _searchValue As String
Public Sub New(locInText as Integer)
_locInText = locInText
End Sub
'...
End Class
并使用:
Public Class PaintData
Public Time As TimeSpan
Public Color As New DataPoint(4)
Public Job As New DataPoint(5)
Public MaxCurrent As New DataPoint(6)
End Class
或者你可以使用
Public Property Color As DataPoint = New DataPoint With {.LocInText = 4}
在您的班级定义中。这种语法可以说比构造函数语法更具可读性。