输入框直到输入两个字母

Question

这是我第一次使用 InputBox。希望让用户将他们的姓名首字母输入到将被导入数据库的电子表格中。我正在使用 InputBox 来提高一致性并自动填充必要的单元格。

我无法理解用户输入信息的过程，如果输入是两个字母，则接受并填充到单元格中，否则会出现一条消息，指示需要两个字母，并且 InputBox 再次显示。通过测试，我相信我的循环没有像我预期的那样工作。如果第一个条目是两个字母，它将按预期将信息填充到 excel 中。但是，如果第一个条目不正确而后续条目正确，则它似乎不会退出循环。我不确定为什么会这样？任何帮助将不胜感激。

Dim c As Range

Set c = Sheets("CompilePriceAdjustments").Range("E2")

    c = InputBox("Please Enter Initials", "PRICE INCREASE APPROVER")
Do Until c = vbString And Len(c) = 2
    MsgBox ("You must enter two letters")
    c = InputBox("Please Enter Initials", "PRICE INCREASE APPROVER")
Loop

Sheets("CompilePriceAdjustments").Range("E2").Value = UCase(c)
c.AutoFill Destination:=Sheets("CompilePriceAdjustments").Range("E2:E" & Cells    (Rows.Count, "D").End(xlUp).Row)

Answer 1

我认为这就是你正在尝试的？

Sub Sample()
    Dim c As Range
    Dim Ret

    Set c = Sheets("CompilePriceAdjustments").Range("E2")

    Ret = InputBox("Please Enter Initials - (Only alphabets allowed of 2 Length)", "PRICE INCREASE APPROVER")

    Do Until (isString(Ret) And Len(Ret) = 2)
        Ret = InputBox("Please Enter Initials - (Only alphabets allowed of 2 Length)", "PRICE INCREASE APPROVER")
    Loop

    c.Value = UCase(Ret)
    '
    '~~> Rest of the code
    '
End Sub

Function isString(s As Variant) As Boolean
    Dim i As Long

    isString = True

    For i = 1 To Len(s)
        Select Case Asc(Mid(s, i, 1))
        Case 65 To 90, 97 To 122
        Case Else
            isString = False
            Exit Function
        End Select
    Next i
End Function

编辑

我发现您的方法存在一个缺陷。如果用户想取消并退出怎么办？您可能要考虑这段代码？

Sub Sample()
    Dim c As Range
    Dim Ret

    Set c = Sheets("CompilePriceAdjustments").Range("E2")

    Ret = InputBox("Please Enter Initials-(Only alphabets allowed of 2 Length)", _
          "PRICE INCREASE APPROVER")

    '~~> Added  Or Ret = "" so that user can cancel the inputbox if required
    Do Until (isString(Ret) And Len(Ret) = 2) Or Ret = ""
        Ret = InputBox("Please Enter Initials-(Only alphabets allowed of 2 Length)", _
        "PRICE INCREASE APPROVER")
    Loop

    '~~> This is required so that user can press cancel and exit
    If Ret = "" Then Exit Sub

    c.Value = UCase(Ret)
    '
    '~~> Rest of the code
    '
End Sub

Function isString(s As Variant) As Boolean
    Dim i As Long

    isString = True

    For i = 1 To Len(s)
        Select Case Asc(Mid(s, i, 1))
        Case 65 To 90, 97 To 122
        Case Else
            isString = False
            Exit Function
        End Select
    Next i
End Function

Answer 2

考虑：

Sub dural()
    Dim c As Range, init As String
    Set c = Sheets("CompilePriceAdjustments").Range("E2")
    init = ""
    While Len(init) <> 2
        init = Application.InputBox(Prompt:="Enter two initials", Type:=2)
    Wend
    MsgBox "Thanks"
    c.Value = init
End Sub