设置Listindex后，Excel Listbox不一致地没有值 [英] Excel Listbox inconsistently has no value after setting the Listindex

问题描述

我有一个简单的用户窗体，其中包含两个列表框和两个文本框，其中包含当前所选Listitem的值.我有一个奇怪的错误，即在加载表单时其中一个框不会填充.如果我关闭该表单并再次加载它，则对面的框将不会加载.如果我关闭并第三次重新加载，则它将加载第一个框，但不会再次加载第二个框.重复广告恶心.

I have a simple UserForm with two Listboxes and two Textboxes that contain the value of the currently selected Listitem. I am having a bizarre bug where one of the boxes will not populate when the form loads. If I close the form and load it again, then the opposite box will not load. If I close and reload a third time, then it loads the first box but not the second again. Repeat ad nauseum.

首次加载:

第二次加载:

在启动时，代码中应同时填充两个文本框.该错误的根源是什么?

The code should have both Textboxes populated at startup. What is the source of this bug?

Private Sub UserForm_Initialize()
    Dim i As Long

    For i = 1 To 4
        ListBox1.AddItem "Item A - " & i
    Next i
    ListBox1.ListIndex = 0

End Sub


Private Sub ListBox1_Change()

    Dim i As Long

    ListBox2.Clear
    For i = 1 To 3
        ListBox2.AddItem "Item B - " & i
    Next i
    ListBox2.ListIndex = 0

    TextBox1.Value = ListBox1.Value
End Sub

Private Sub ListBox2_Change()
    TextBox2.Value = ListBox2.Value
End Sub

推荐答案

这个答案来自Yow3Ek以及来自任何人.此代码按测试运行，没有错误或先前的问题.谢谢大家，我今天学到了一些东西.它正在开火.

This answer is from Yow3Ek as much as from anyone. This code runs as tested without error or previous problem. Thanks guys, I learned something today. It was firing on the clear.

Private Sub UserForm_Initialize()
    Dim i As Long

    For i = 1 To 4
        Me.ListBox1.AddItem "Item A - " & i
    Next i
    Me.ListBox1.ListIndex = 0

End Sub


Private Sub ListBox1_Change()

    Dim i As Long

    Me.ListBox2.Clear
    For i = 1 To 3
        ListBox2.AddItem "Item B - " & i
    Next i
    Me.ListBox2.ListIndex = 0


    Me.TextBox1.Value = Me.ListBox1.List(Me.ListBox1.ListIndex)
End Sub

Private Sub ListBox2_Change()
    If Me.ListBox2.ListIndex = -1 Then Exit Sub
    Me.TextBox2.Value = Me.ListBox2.List(Me.ListBox2.ListIndex)
End Sub

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