excel - Dir() 对返回的文件的顺序有任何保证吗？

Question

我正在尝试清理一些现有代码

Sheets("Control").Select
MyDir = Cells(2, 1)
CopySheet = Cells(6, 2)
MyFileName = Dir(MyDir & "wp*.xls")

' when the loop breaks, we know that any subsequent call to Dir implies
' that the file need to be added to the list
While MyFileName <> LastFileName
    MyFileName = Dir
Wend

MyFileName = Dir

While MyFileName <> ""
    Cells(LastRow + 1, 1) = MyFileName
    LastRow = LastRow + 1
    MyFileName = Dir
Wend

我的问题涉及 Dir 如何返回结果以及结果的顺序是否有任何保证。当在上面的循环中使用 Dir 时，代码意味着对 Dir 的最终调用按名称排序。

除非 Dir 保证这一点，否则这是一个需要修复的错误。问题是，Dir() 是否对返回文件的顺序做出任何保证还是隐式的？

解决方案

根据@Frederic的回答，这是我想出的解决方案。

使用这个quicksort algorithm结合和一个函数 returns all files in a folder ...

Dim allFiles As Variant
allFiles = GetFileList(MyDir & "wp*.xls")
If IsArray(allFiles) Then
    Call QuickSort(allFiles, LBound(allFiles), UBound(allFiles))
End If

Dim x As Integer
Dim lstFile As String
x = 1

' still need to loop through results to get lastFile
While lstFile <> LastFileName 
    lstFile = allFiles(x)
    x = x + 1
Wend

For i = x To UBound(allFiles)
    MyFileName = allFiles(i)
    Cells(LastRow + 1, 1) = MyFileName
    LastRow = LastRow + 1
Next i

Answer 1

不保证 Dir() 会按任何特定顺序返回文件。 MS Access VBA documentation甚至说:

Tip Because file names are retrieved in no particular order, you may want to store returned file names in an array, and then sort the array.