[英]what can i use as a generic of List so i can change the type within the list in vb.net
so i currently have 所以我现在有
class general
private list as List(Of string)
public overridable function getprivateList as <not sure what to put>
return list
end function
end class
class specific inherits general
private list as List(Of listofstrings)
end class
but I cannot figure out what to use as an interface . 但我无法弄清楚用什么作为界面。 so that the method getprivateList is able to return both variations of list, depending on the class of implementation.
因此getprivateList方法能够返回列表的两个变体,具体取决于实现类。
You could return IEnumerable
, ICollection
, or IList
. 您可以返回
IEnumerable
, ICollection
或IList
。 IEnumerable
has the least functionality and IList
has the most. IEnumerable
功能最少, IList
拥有最多功能。
Class General
Private list As List(Of String)
Public Overridable Function GetPrivateList() As IList
Return list
End Function
End Class
Class Specific
Inherits General
Private list As List(Of Integer)
End Class
Alternatively, you could define your base class as a generic class which takes the type of list item: 或者,您可以将基类定义为采用列表项类型的泛型类:
Class General(Of T)
Private list As List(Of T)
Public Overridable Function GetPrivateList() As List(Of T)
Return list
End Function
End Class
Class Specific
Inherits General(Of Integer)
End Class
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