excel - VBA Combobox/自动生成代码

Question

我有一个关于 Excel 中的组合框的问题。

我有一个 Excel 表，默认情况下包含两个组合框，它们的编号由变量 x 描述(默认情况下 x=2)。每个组合框都被编写成在 subs 中以特定方式运行，例如我有:private sub ComboBox1_DropButtonClick()。

尽管如此，有时我需要通过更改 X 的值来增加这些框的数量。我总共可能需要多达 10 个组合框。现在的问题是是否有任何方法可以设置无限数量的组合框的行为(例如在 DropButtonClick 事件中)。我所做的是为每个组合框编写代码，所以我有一个用于 ComboBox1_DropButtonClick()、ComboBox2_DropButtonClick()、ComboBox3_DropButtonClick() 等的子代码。代码有所不同，但它是可重复的。所以这一切看起来都很愚蠢，我正在寻找一些更巧妙的解决方案。也许所有这些组合框都可以一次性编写脚本？如果有任何方法可以做到这一点，请与我分享。

谢谢，沃伊切赫。

[编辑] 我的代码的位置(标记为灰色):
Screenshot from VBA editor in VBA

Answer 1

下面是一些动态添加控件到 Excel 用户窗体的代码，并在后面添加代码。添加的代码将使其在 ComboBox 收到 KeyDown 时显示 MessageBox .

代码有些注释，但如果您有任何问题，请告诉我 :)

Option Explicit

Sub CreateFormComboBoxes(NumberOfComboBoxes As Long)
    Dim frm         As Object
    Dim ComboBox    As Object
    Dim Code        As String
    Dim i           As Long

    'Make a blank form called 'UserForm1', or any name you want
    'make sure it has no controls or any code in it
    Set frm = ThisWorkbook.VBProject.VBComponents("UserForm1")

    With frm
        For i = 1 To NumberOfComboBoxes
            Set ComboBox = .designer.Controls.Add("Forms.ComboBox.1")
             'Set the properties of the new controls
             With ComboBox
                .Width = 100
                .Height = 20
                .Top = 20 + ((i - 1) * 40) 'Move the control down
                .Left = 20
                .Visible = True
                .ZOrder (1)
                .Name = "ComboBox" & i
            End With
            'Add your code for each module, you can add different code, by adding a if statement here
            'And write the code depending on the name, index, or something else
            Code = Code & vbNewLine & "Private Sub " & "ComboBox" & i & "_KeyDown(ByVal KeyCode As MSForms.ReturnInteger, ByVal Shift As Integer)" & _
                   vbNewLine & "    MsgBox(""hi"")" & vbNewLine & "End Sub"
        Next

        'Add the code
        .CodeModule.InsertLines 2, Code
    End With

End Sub

'Run this
Sub Example()
    CreateFormComboBoxes 5
End Sub


**Edit**

我想我不妨添加另一种方法来将控件动态添加到 Excel 工作表。我建议坚持使用 UserForms，但是，当工作表中需要控件时，这里有一种方法可以提供帮助。

Sub addCombosToExcelSheet(MySheet As Worksheet, NumberOfComboBoxes As Long, StringRangeForDropDown As String)
    Dim i           As Long
    Dim combo       As Shape
    Dim yPosition   As Long
    Dim Module      As Object

    yPosition = 20
    For i = 1 To NumberOfComboBoxes
        yPosition = (i - 1) * 50

        'Create the shape
        Set combo = MySheet.Shapes.AddFormControl(xlDropDown, 20, yPosition, 100, 20)

        ' Range where the values are stored for the dropDown
        combo.ControlFormat.ListFillRange = StringRangeForDropDown
        combo.Name = "Combo" & i
        Code = "Sub Combo" & i & "_Change()" & vbNewLine & _
               "    MsgBox(""hi"")" & vbNewLine & _
               "End Sub"
        'Add the code
        With ThisWorkbook
            'Make sure Module2 Exits and there is no other code present in it
            Set Module = .VBProject.VBComponents("Module2").CodeModule
            Module.AddFromString (Code)
        End With

        'Associate the control with the action, don't include the () at the end!
        combo.OnAction = "'" & ActiveWorkbook.Name & "'!Combo" & i & "_Change"
    Next

End Sub

Sub Example()
    Dim sht As Worksheet: Set sht = ThisWorkbook.Sheets(1)
    addCombosToExcelSheet sht, 10, "Sheet1!$A$1:$A$10"
End Sub