Question

我在Visual Studio 2015中使用Visual Basic .NET，我想知道以下内容。假设我有两个名为InterfaceA和InterfaceB的接口，InterfaceB继承自InterfaceA，如下所示：

Public Interface InterfaceA
    Property A As String ' Type not important here.
End Interface

Public Interface InterfaceB
    Inherits InterfaceA

    Property B As Integer ' Type not important here, either.
End Interface

现在我要创建一个名为InterfaceBImplementer的类，（顾名思义）实现InterfaceB：

Public Class InterfaceBImplementer
    Implements InterfaceB

    Public Property B As Integer Implements InterfaceB.B
        Get
            ' Snip.
        End Get
        Set(value As Integer)
            ' Snip.
        End Set
    End Property

' To be continued...

到目前为止，这么好。财产B只能在InterfaceB中找到，因此不存在问题来源。

但是，InterfaceB会从A继承属性InterfaceA。 A中的InterfaceBImplementer的以下两种实现似乎都是有效的：

' Referring to InterfaceA.
Public Property A As String Implements InterfaceA.A
    Get
        ' Snip.
    End Get
    Set(value As String)
        ' Snip.
    End Set
End Property

或：

' Referring to InterfaceB.
Public Property A As String Implements InterfaceB.A
    Get
        ' Snip.
    End Get
    Set(value As String)
        ' Snip.
    End Set
End Property

我更喜欢哪一个？这两者之间有什么区别，还是没关系？如果两者相同，我应该遵循哪些惯例或最佳实践？

Answer 1

它是Public Property A As String Implements InterfaceB.A，因为你要实现在InterfaceBImplementer类上强制转换的intefrace。

VB.NET中的接口继承：我在实现中引用了哪一个？

1 个答案: