如何为此创建一个循环？Excel VBA

Question

我是VBA的新手。我想为将在工作簿中的所有工作表中循环的宏创建此循环。基本上，我想做的是将“ G”列中的所有日期更改为从8/15/2018到201808（yyyymm）。这是录制的宏：

Sheets("Sheet1").Select
Columns("G:G").Select
Selection.NumberFormat = "yyyymm"
Application.ScreenUpdating = False

我将如何去做呢？

Answer 1

您可以循环工作表集合以将每一列的格式应用于该表。使用工作表集合的优点是可以避免工作簿中包含任何图表表。

Option Explicit
Public Sub ApplyFormatting()
    Dim ws As Worksheet
    For Each ws In ThisWorkbook.Worksheets
        ws.Columns("G:G").NumberFormat = "yyyymm"
    Next
End Sub

如果您使用字符串而不是日期，则可以尝试将字符串转换为日期格式，例如

Option Explicit
Public Sub ApplyFormatting()
    Dim ws As Worksheet, inputArray(), lastRow As Long
    For Each ws In ThisWorkbook.Worksheets
        With ws.Columns("G:G")
            lastRow = ws.Cells(.Rows.Count, "G").End(xlUp).Row
            inputArray = ws.Range("G1:G" & lastRow).Value
            inputArray = ProcessArray(inputArray)
            .Cells(1, 1).Resize(UBound(inputArray, 1), UBound(inputArray, 2)) = inputArray
            .NumberFormat = "yyyymm"
        End With
    Next
End Sub

Public Function ProcessArray(ByRef inputArray As Variant) As Variant
    Dim i As Long
    For i = LBound(inputArray, 1) To UBound(inputArray, 1)
        inputArray(i, 1) = GetDate(inputArray(i, 1))
    Next
    ProcessArray = inputArray
End Function

Public Function GetDate(ByVal dateString As String) As String
    Dim arr() As String
    If dateString = vbNullString Or Not InStr(dateString, "/") > 0 Then
        GetDate = vbNullString
    Else
        arr = Split(dateString, "/")
        GetDate = Format$(DateSerial(arr(2), arr(0), arr(1)), "yyyy-mm-dd")
    End If
End Function