VBA：Regex 和 Dir() 函数问题

Question

我使用 VBA 编写了一个简单的脚本。 （我需要用excel优化一些工作）。

关于正则表达式的第一个问题：

正如我之前所说，我使用了 VBA。

简单任务：获取模式匹配并捕获子匹配。

我的代码是：

Dim ResStr as Object
Dim LastStr as Object
Dim RE as Object


Set RE = CreateObject("vbscript.regexp") 'create a regex
With RE
    .MultiLine = False  'm-key
    .Global = False     'g-key
    .IgnoreCase = False 'i-key
    .Pattern = "[<]TD\s+class=gm[>](\d+\.\d+)[<][/]TD[>]" 'tag
End With

Set ResStr = RE.Execute(StrDollar)  'use regex  
Set LastStr = ResStr(0).SubMatches  'get submatch

如何获得 LAST 匹配和 LAST 子匹配？ （长度属性？）

关于Dir函数的第二个问题：

如何过滤文件？

我在msdn上看到了这段代码：

   ' Display the names in C:\ that represent directories.
   MyPath = "c:\"   ' Set the path.
   MyName = Dir(MyPath, vbDirectory)   ' Retrieve the first entry.
   Do While MyName <> ""   ' Start the loop.
     ' Use bitwise comparison to make sure MyName is a directory.
     If (GetAttr(MyPath & MyName) And vbDirectory) = vbDirectory Then
       ' Display entry only if it's a directory.
       Debug.WriteLine(MyName)
     End If   
     MyName = Dir()   ' Get next entry.
  Loop

If (GetAttr(MyPath & MyName) And vbDirectory) = vbDirectory Then - 停止'msdn-guy'！你在开玩笑吗？它只有一种方法吗？

有什么方法可以制作普通的滤镜，而不是这种巨大的线法？

Answer 1

要获取所有匹配项、子匹配项、长度等，您可以使用类似这样的内容 - 我添加了一个工作示例，该示例使用更简单的模式进行演示（即，将数字序列与非数字匹配）

您应该在假定已找到匹配项之前Test您的正则表达式以避免错误

Sub Test()
Dim RE As Object
Dim strSample As String
Dim ResStr As Object
Dim LastStr As Object
strSample = "123dd6789a"
Set RE = CreateObject("vbscript.regexp")    'create a regex
With RE
    .MultiLine = False  'm-key
    .Global = True     'g-key
    .IgnoreCase = False    'i-key
    .Pattern = "\d+([^\d])"
End With
If RE.Test(strSample) Then
    Set ResStr = RE.Execute(strSample)
    For Each LastStr In ResStr
        MsgBox "Match: " & LastStr & vbNewLine & "SubMatch: " & LastStr.submatches(0) & vbNewLine & "Position: " & LastStr.firstindex + 1 & vbNewLine & "Length: " & LastStr.Length
    Next
End If
End Sub

Answer 2

问题 1

你可以试试这个：

Sub Test(StrDollar)
Dim LastStr As Object
Dim RE As New RegExp
Dim mt As Match


With RE
    .MultiLine = False  'm-key
    .Global = True     'g-key
    .IgnoreCase = False 'i-key
    .Pattern = "<TD\s+class=gm>(\d+\.\d+)</TD>" 'tag
    For Each mt In .Execute(StrDollar)
         Set LastStr = mt.SubMatches  'get submatch
    Next mt
End With

MsgBox LastStr(0)

End Sub

---

问题2

也许dir() 函数无法根据扩展名创建文件列表。

[编辑]

Sub Test2(StrDollar)
Dim LastStr As Object
Dim RE As New RegExp
Dim mt As Match
Dim dic As New Scripting.Dictionary 'scripting runtime
Dim pos&

With RE
    .MultiLine = False  'm-key
    .Global = True     'g-key
    .IgnoreCase = False 'i-key
    .Pattern = "<TD\s+class=gm>(\d+\.\d+)</TD>" 'tag
    For Each mt In .Execute(StrDollar)
        pos = pos + 1
        dic.Add CStr(pos), mt.FirstIndex & "||" & mt.Value & "||" & mt.SubMatches(0)
    Next mt
End With

MsgBox dic.item(CStr(pos))

End Sub

[/编辑]