Excel VBA 的新功能：#Value 创建字符串时出错

Question

抱歉，我假设错误是基本的，但我不确定我做错了什么。

我正在尝试编写一个函数，它接受一个单元格并将标记为红色的字符转换为小写。我通过在新变量中重建字符串来做到这一点。

然后返回这个重构的字符串。但是，当我尝试在字符串 Excel 中使用此函数时，它 returns 出现了 #Value 错误。该代码没有编译错误，所以我不知所措。任何帮助将不胜感激。


    Function Convert_Red(rng As Range)

    If (rng.Cells.Count > 1) Then
         AcceptOneCell = "Only allow 1 cell"
         Exit Function
    End If

    Dim i As Long
    Dim text As String
    Dim new_text As String
    Dim placeholder As String

    text = rng.Cells(1, 1).Value

    For i = 1 To Len(text)
        If rng.Cells(1, 1).Characters(Start:=i, Length:=1).Font.Color  vbRed 
    Then
        new_text = new_text + LCase(rng.Cells(1, 1).Characters(Start:=i, 
    Length:=1))
        Else
            new_text = new_text + rng.Cells(1, 1).Characters(Start:=i, Length:=1)
       End If
       i = i + 1
    Next

    Convert_Red = new_text

    End Function

Answer 1

我猜你当前的代码是什么，因为发布的代码无法编译。我相信您正在寻找以下内容：

Function Convert_Red(rng As Range)

    If (rng.Cells.Count > 1) Then
        'Use the correct function name when returning a result
        'AcceptOneCell = "Only allow 1 cell"
        Convert_Red = "Only allow 1 cell"
        Exit Function
    End If

    Dim i As Long
    Dim text As String
    Dim new_text As String
    Dim placeholder As String

    text = rng.Cells(1, 1).Value

    For i = 1 To Len(text)
        'Fix syntax errors
        'If rng.Cells(1, 1).Characters(Start:=i, Length:=1).Font.Color  vbRed
        'Then
        If rng.Cells(1, 1).Characters(Start:=i, Length:=1).Font.Color = vbRed Then
            ' 1) Fix syntax errors
            ' 2) Use & for string concatenation
            ' 3) A Characters object has no default property - specify Text
            'new_text = new_text + LCase(rng.Cells(1, 1).Characters(Start:=i, 
            'Length:=1))
            new_text = new_text & LCase(rng.Cells(1, 1).Characters(Start:=i, Length:=1).Text)
        Else
            ' 1) Use & for string concatenation
            ' 2) A Characters object has no default property - specify Text
            'new_text = new_text + rng.Cells(1, 1).Characters(Start:=i, Length:=1)
            new_text = new_text & rng.Cells(1, 1).Characters(Start:=i, Length:=1).Text
        End If
        'Don't mess with the loop counter
        'i = i + 1
    Next

    Convert_Red = new_text

End Function

请注意，如果源区域包含公式、数值或日期，则使用 Characters 将不起作用。

Answer 2

试试这个：

Option Explicit

Public Function LCaseReds(rng As Range)

    Dim i As Long, ltr As String, adr As String, result As String

    Select Case True
        Case rng.Cells.Count > 1: result = "Use only one cell"
        Case Len(rng.Value2) = 0: result = "Empty cell: '" & rng.Address(False, False) & "'"
        Case Else:
            For i = 1 To Len(rng)
                With rng.Characters(Start:=i, Length:=1)
                    ltr = .Text
                    result = result + IIf(.Font.Color = vbRed, LCase(ltr), ltr)
                End With
            Next
    End Select

    LCaseReds = result

End Function

请注意，您仍将获得#Value！使用多个区域（C3、E3）时

Excel VBA 的新功能：#Value 创建字符串时出错

New to Excel VBA: #Value error on string creation

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