Question

我有2个classess。像这样的角色和用户

角色

Public Class Role
    Public Property RoleID As Integer
    Public Property CreatedBy As User

    Sub New()    
        If Me.CreatedBy Is Nothing Then
            Me.CreatedBy = New User()
        End If
End Class

用户

Public Class User
    Public Property UserID As Integer
    Public Property Role As Role

  Public Sub New()
        If Me.Role Is Nothing Then
            Me.Role = New Role()
        End If
    End Sub
End Class

情况就像我们创建角色一样，我们将保存创建此角色的人员。所以我有一个类型为User的CreatedBy属性。类似地，当我们创建用户时，我们将提到新用户所属的角色。因此，我有一个名为“角色”的属性“角色”。当我创建User类的对象时，这个循环引用给我StackOverflow异常作为递归。

我该如何处理？我应该恢复我的诱惑吗？怎么样？

Answer 1

在每个类中创建构造函数重载以传递宿主对象：

Public Class User
    Public Property UserID As Integer
    Public Property Role As Role

    Public Sub New()
        Me.Role = New Role(Me)
    End Sub
    Public Sub New(oRole As Role)
        Me.Role = Role
    End Sub
End Class

Public Class Role
    Public Property RoleID As Integer
    Public Property CreatedBy As User

    Sub New()
        Me.CreatedBy = New User(Me)
    End Sub
    Public Sub New(oUser As User)
        Me.CreatedBy = oUser
    End Sub
End Class

VB.NET我的类属性最终出现在循环引用中，从而导致StackOverflow异常

1 个答案: