vba - 如何检测单元格格式的变化？

Question

我想在 Excel 工作表中嵌入一个过程，该过程将检测单元格格式何时发生变化，例如从文本到数字。

但我不知道如何获取单元格的格式类型。我尝试使用 Worksheet_Change事件处理程序检查数据类型，如下:

Private Sub worksheet_change(ByVal Target As Range)

If Target.Address = "a1" Then
    If VarType(Target) <> 5 Then
        MsgBox "cell format has been changed"
    End If
End If


End Sub

但使用此代码后，如果我将单元格 A1 的数据类型从数字更改为文本，Worksheet_Change没有被触发；仅当我更改单元格的内容时才会调用事件处理程序。

此外，此过程还可以检测内容是否从数字更改为字母字符串，例如从“35.12”到“abcd”，但不是数字型数字到文本型数字；如果我将单元格 B1 设置为文本，然后输入“40”，然后将单元格 B1 的内容粘贴到单元格 A1 中，vartype()仍然返回“5”，因此不会触发警报。

无论内容类型是否已更改，如何检测格式已更改？

Answer 1

好问题!

如果您只想在 NumberFormat 更改上触发事件(您似乎错误地将其称为数据格式，NumberFormat 是您想要的属性)，以下是一个很好的示例。

我正在拦截所有选择更改事件并检查是否有任何 NumberFormat 发生更改。

Option Explicit

'keep track of the previous
Public m_numberFormatDictionary As New dictionary
Public m_previousRange As Range

Private Sub Worksheet_SelectionChange(ByVal Target As Range)

    'requires reference to Microsoft Scripting Runtime

    Dim c As Variant
    Dim wasChange As Boolean


    Debug.Print "***********************"

    'make sure you had a previous selection and it was initialized
    If m_numberFormatDictionary.Count > 0 And Not m_previousRange Is Nothing Then

        'Iterate through all your previous formattings and see if they are the same
        For Each c In m_previousRange
            Debug.Print "Found " & c.NumberFormat & " in " & c.Address
            Debug.Print "Stored value is " & m_numberFormatDictionary(c.Address) & " in " & c.Address

            'print out when they are different
            If c.NumberFormat <> m_numberFormatDictionary(c.Address) Then
                Debug.Print "~~~~~~ Different ~~~~~~"
                wasChange = True
            End If

        Next c
    End If

    'clear previous values
    m_numberFormatDictionary.RemoveAll

    'Make sure you don't error out Excel by checking a million things
    If Target.Cells.Count < 1000 Then

        'Add each cell format back into the previous formatting
        For Each c In Target
            Debug.Print "Adding " & c.NumberFormat & " to " & c.Address
            m_numberFormatDictionary.Add c.Address, c.NumberFormat
        Next c

        'reset the range to what you just selected
        Set m_previousRange = Target
    End If

    'simple prompt now, not sure what your use case is
    If wasChange Then
        MsgBox "There was at least one change!"
    End If

End Sub

我不太确定您在寻找什么，您必须适当修改 print/msgbox 语句。根据您的用例，您可能需要稍微修改一下，但它适用于我的所有测试示例。