如何从子类(嵌套类)中获取父类中的值？

Question

我有Class1和class2,它在class1,VB.NET代码中:

Public Class class1
    Public varisbleX As Integer = 1
    Public Class class2
        Public Sub New()
            'Here GET the value of VariableX
        End Sub
    End Class

    Public Sub New()
        Dim cls2 As New class2
    End Sub
End Class

我想从class2访问varisbleX,在VB.net或C#中的代码表示赞赏,谢谢.

Answer 1

内部类(class2)不与外部类(class1)的任何特定实例相关联.在T访问字段等中,您需要首先对class1实例进行显式引用,可能通过构造函数传递它.例如,它可能是:

Public Class class1
    Public varisbleX As Integer = 1
    Public Class class2
        Public Property Parent As class1

        Public Sub New(oParent As class1)
            Me.Parent = oParent
            Console.WriteLine(oParent.varisbleX)
        End Sub
    End Class

    Public Sub New()
        Dim cls2 As New class2(Me)
    End Sub
End Class