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vb.net - VB.NET 类不更新我的变量

问题描述

我有两节课。

1-) NumberClass 2-) MessageClass

数字类；

Public Class NumberClass

Property Number As Byte
End Class

消息类；

Public Class MessageManager
Inherits NumberClass

Public Sub sendMessage()
    MsgBox(Number)
End Sub
End Class
Public Class Form1

这是我的按钮代码：

Private Sub ShowNumberBtn_Click(sender As Object, e As EventArgs) Handles ShowNumberBtn.Click
    Dim messageManager As New MessageManager
    messageManager.sendMessage()
End Sub

Private Sub ChangeNumberBtn_Click(sender As Object, e As EventArgs) Handles ChangeNumberBtn.Click
    Dim numberClass As New NumberClass
    numberClass.Number = 50
    MsgBox("Number Changed to : " & numberClass.Number)
End Sub

首先我点击更改号码按钮。它将 Number 变量的值更改为 50。直到这里一切正常，但是当我单击发送消息按钮消息显示 Number 变量的旧值时，它不会反映在 sendMessage 方法中。

标签： vb.netclassbasic

解决方案

对我来说效果很好...不确定您尝试了什么，因为您从未更新代码以显示您的尝试：

Public Class Form1

    Private messageManager As New MessageManager

    Private Sub ShowNumberBtn_Click(sender As Object, e As EventArgs) Handles ShowNumberBtn.Click
        messageManager.sendMessage()
    End Sub

    Private Sub ChangeNumberBtn_Click(sender As Object, e As EventArgs) Handles ChangeNumberBtn.Click
        messageManager.Number = 50
        MsgBox("Number Changed to : " & messageManager.Number)
    End Sub

End Class

Public Class NumberClass

    Property Number As Byte

End Class

Public Class MessageManager
    Inherits NumberClass

    Public Sub sendMessage()
        MessageBox.Show("Number = " & Number)
    End Sub

End Class

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