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如何在 Excel VBA 用戶表單中向動態創建的控件(按鈕、列表框)添加事件

[英]How to add events to dynamically created controls (buttons, listboxes) in Excel VBA userform

我正在嘗試實時構建用戶表單。 (在 Excel VBA 中)只是為了嘗試,我從 2 個標簽、一個文本框、一個組合框和一個命令按鈕開始。 我列出了下面的代碼+結果形式。

我的問題是:如何將事件鏈接到控件,特別是組合框和命令按鈕? 通常(使用手動創建的表單),這將通過調用的例程完成:cmbTabel_change() 和 cmdExit_click()。 但這似乎不起作用,當它們是動態創建的。 誰能幫我?

代碼:

Private Sub UserForm_Initialize()
    Dim cCont As Control

    Call Add_Control(cCont, "Label", "lblDatabase", "Database", 30, 23, 60, 18)
    Call Add_Control(cCont, "Textbox", "txtDatabase", "Database", 110, 20, 60, 18)
    Call Add_Control(cCont, "Label", "lblTabel", "Tabel", 30, 47, 90, 18)
    Call Add_Control(cCont, "Combobox", "cmbTabel", "Tabel", 110, 44, 90, 18)
    Call Add_Control(cCont, "CommandButton", "cmdExit", "Afsluiten", 210, 140, 54, 18)
End Sub

Private Sub Add_Control(ctrl, ctp, cnm, cap, l, t, w, h)
    Set ctrl = Me.controls.Add("Forms." & ctp & ".1", cnm)
    With ctrl
        .Left = l
        .Top = t
        .Width = w
        .Height = h
    End With

    Select Case ctp
    Case "Combobox"
        controls(cnm).Clear
        For j = 1 To 5
            controls(cnm).AddItem "ListItem" & j
        Next j
        controls(cnm).ListIndex = 0
    Case "Label", "CommandButton"
        With controls(cnm)
            .Caption = cap
        End With
    Case "Textbox"
        controls(cnm).Text = cap
    End Select
End Sub

結果形式:

在此處輸入圖片說明

您需要構建一個類來處理控件上的事件。

例如,創建一個名為clsMyEvents的新類模塊。
將此代碼添加到類中:

Option Explicit

Public WithEvents MyCombo As MSForms.ComboBox
Public WithEvents MyButton As MSForms.CommandButton

Private Sub MyCombo_Change()
    MsgBox MyCombo.Name & " was changed to value " & MyCombo.Value
End Sub

Private Sub MyButton_Click()

    Dim BtnNum As Long

    BtnNum = Replace(MyButton.Name, "MyButton", "")

    MsgBox MyButton.Name & " is " & IIf(BtnNum Mod 2 = 0, "even", "odd")

End Sub

注意:當您進入WithEvents您將能夠選擇與該類型控件關聯的大多數事件。

接下來,創建一個空白的UserForm並添加以下代碼:

Option Explicit

Public MyEvents As New Collection

Private Sub UserForm_Initialize()

    Dim tmpCtrl As Control
    Dim CmbEvent As clsMyEvents
    Dim x As Long

    'Add some dummy data for the combo-boxes.
    Sheet1.Range("A1:A5") = Application.Transpose(Array("Red", "Yellow", "Green", "Blue", "Pink"))
    Sheet1.Range("B1:B5") = Application.Transpose(Array(1, 2, 3, 4, 5))
    Sheet1.Range("C1:C5") = Application.Transpose(Array(5, 4, 3, 2, 1))

    For x = 1 To 5
        'Add the control.
        Set tmpCtrl = Me.Controls.Add("Forms.ComboBox.1", "MyCombobox" & x)
        With tmpCtrl
            .Left = 10
            .Width = 80
            .Top = (x * 20) - 18 'You might have to adjust this spacing.  I just made it up.
            .RowSource = "Sheet1!" & Sheet1.Cells(1, x).Resize(5).Address
        End With

        'Attach the event.
        Set CmbEvent = New clsMyEvents
        Set CmbEvent.MyCombo = tmpCtrl
        MyEvents.Add CmbEvent

    Next x

    For x = 1 To 5
        Set tmpCtrl = Me.Controls.Add("Forms.CommandButton.1", "MyButton" & x)
        With tmpCtrl
            .Left = 100
            .Width = 50
            .Height = 20
            .Top = (x * 20) - 18
            .Caption = "Num " & x
        End With

        Set CmbEvent = New clsMyEvents
        Set CmbEvent.MyButton = tmpCtrl
        MyEvents.Add CmbEvent
    Next x

End Sub

編輯:我已經更新以包含命令按鈕的代碼。 當您更改組合框中的值時,它會告訴您控件的名稱以及更改后的值。 當你點擊一個按鈕時,它會告訴你上面的數字是奇數還是偶數。

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