VBA
Scripting.FileSystemObject

Skapa ett FileSystemObject

Const ForReading = 1
Const ForWriting = 2
Const ForAppending = 8

Sub FsoExample()
    Dim fso As Object ' declare variable
    Set fso = CreateObject("Scripting.FileSystemObject") ' Set it to be a File System Object

    ' now use it to check if a file exists
    Dim myFilePath As String
    myFilePath = "C:\mypath\to\myfile.txt"
    If fso.FileExists(myFilePath) Then
        ' do something
    Else
        ' file doesn't exist
        MsgBox "File doesn't exist"
    End If
End Sub

Läsa en textfil med ett FileSystemObject

Const ForReading = 1
Const ForWriting = 2
Const ForAppending = 8

Sub ReadTextFileExample()
    Dim fso As Object
    Set fso = CreateObject("Scripting.FileSystemObject")

    Dim sourceFile As Object
    Dim myFilePath As String
    Dim myFileText As String

    myFilePath = "C:\mypath\to\myfile.txt"
    Set sourceFile = fso.OpenTextFile(myFilePath, ForReading)
    myFileText = sourceFile.ReadAll ' myFileText now contains the content of the text file
    sourceFile.Close ' close the file
    ' do whatever you might need to do with the text

    ' You can also read it line by line
    Dim line As String
    Set sourceFile = fso.OpenTextFile(myFilePath, ForReading)
    While Not sourceFile.AtEndOfStream ' while we are not finished reading through the file
        line = sourceFile.ReadLine
        ' do something with the line...
    Wend
    sourceFile.Close
End Sub

Skapa en textfil med FileSystemObject

Sub CreateTextFileExample()
    Dim fso As Object
    Set fso = CreateObject("Scripting.FileSystemObject")

    Dim targetFile As Object
    Dim myFilePath As String
    Dim myFileText As String

    myFilePath = "C:\mypath\to\myfile.txt"
    Set targetFile = fso.CreateTextFile(myFilePath, True)  ' this will overwrite any existing file
    targetFile.Write "This is some new text"
    targetFile.Write " And this text will appear right after the first bit of text."
    targetFile.WriteLine "This bit of text includes a newline character to ensure each write takes its own line."
    targetFile.Close ' close the file
End Sub

Skriva till en befintlig fil med FileSystemObject

Const ForReading = 1
Const ForWriting = 2
Const ForAppending = 8


Sub WriteTextFileExample()
    Dim oFso
    Set oFso = CreateObject("Scripting.FileSystemObject")

    Dim oFile as Object
    Dim myFilePath as String
    Dim myFileText as String

    myFilePath = "C:\mypath\to\myfile.txt"
    ' First check if the file exists
    If oFso.FileExists(myFilePath) Then
        ' this will overwrite any existing filecontent with whatever you send the file
        ' to append data to the end of an existing file, use ForAppending instead
        Set oFile = oFso.OpenTextFile(myFilePath, ForWriting)  
    Else
        ' create the file instead
        Set oFile = oFso.CreateTextFile(myFilePath) ' skipping the optional boolean for overwrite if exists as we already checked that the file doesn't exist.
    End If
    oFile.Write "This is some new text"
    oFile.Write " And this text will appear right after the first bit of text."
    oFile.WriteLine "This bit of text includes a newline character to ensure each write takes its own line."
    oFile.Close ' close the file
End Sub

Räkna upp filer i en katalog med FileSystemObject

Tidigt bundet (kräver en referens till Microsoft Scripting Runtime):

Public Sub EnumerateDirectory()
    Dim fso As Scripting.FileSystemObject
    Set fso = New Scripting.FileSystemObject

    Dim targetFolder As Folder
    Set targetFolder = fso.GetFolder("C:\")
    
    Dim foundFile As Variant
    For Each foundFile In targetFolder.Files
        Debug.Print foundFile.Name
    Next
End Sub

Sent bunden:

Public Sub EnumerateDirectory()
    Dim fso As Object
    Set fso = CreateObject("Scripting.FileSystemObject")

    Dim targetFolder As Object
    Set targetFolder = fso.GetFolder("C:\")
    
    Dim foundFile As Variant
    For Each foundFile In targetFolder.Files
        Debug.Print foundFile.Name
    Next
End Sub

Rekursivt räkna upp mappar och filer

Early Bound (med referens till Microsoft Scripting Runtime )

Sub EnumerateFilesAndFolders( _
    FolderPath As String, _
    Optional MaxDepth As Long = -1, _
    Optional CurrentDepth As Long = 0, _
    Optional Indentation As Long = 2)
  
    Dim FSO As Scripting.FileSystemObject
    Set FSO = New Scripting.FileSystemObject
    
    'Check the folder exists
    If FSO.FolderExists(FolderPath) Then
        Dim fldr As Scripting.Folder
        Set fldr = FSO.GetFolder(FolderPath)
        
        'Output the starting directory path
        If CurrentDepth = 0 Then
          Debug.Print fldr.Path
        End If
        
        'Enumerate the subfolders
        Dim subFldr As Scripting.Folder
        For Each subFldr In fldr.SubFolders
            Debug.Print Space$((CurrentDepth + 1) * Indentation) & subFldr.Name
            If CurrentDepth < MaxDepth Or MaxDepth = -1 Then
                'Recursively call EnumerateFilesAndFolders
                EnumerateFilesAndFolders subFldr.Path, MaxDepth, CurrentDepth + 1, Indentation
            End If
        Next subFldr
        
        'Enumerate the files
        Dim fil As Scripting.File
        For Each fil In fldr.Files
            Debug.Print Space$((CurrentDepth + 1) * Indentation) & fil.Name
        Next fil
    End If
End Sub

Output när man kallas med argument som: EnumerateFilesAndFolders "C:\Test"

C:\Test
  Documents
    Personal
      Budget.xls
      Recipes.doc
    Work
      Planning.doc
  Downloads
    FooBar.exe
  ReadMe.txt

Output när man ringer med argument som: EnumerateFilesAndFolders "C:\Test", 0

C:\Test
  Documents
  Downloads
  ReadMe.txt

Utdata när de kallas med argument som: EnumerateFilesAndFolders "C:\Test", 1, 4

C:\Test
    Documents
        Personal
        Work
    Downloads
        FooBar.exe
    ReadMe.txt

Ta bort filändelsen från ett filnamn

Dim fso As New Scripting.FileSystemObject
Debug.Print fso.GetBaseName("MyFile.something.txt")

Skriver ut MyFile.something

Observera att GetBaseName() redan hanterar flera perioder i ett filnamn.

Hämta bara tillägget från ett filnamn

Dim fso As New Scripting.FileSystemObject
Debug.Print fso.GetExtensionName("MyFile.something.txt")

Skriver ut txt Observera att GetExtensionName() redan hanterar flera perioder i ett filnamn.

Hämta bara sökvägen från en filväg

Metoden GetParentFolderName returnerar överordnade mapp för valfri sökväg. Även om detta också kan användas med mappar, är det utan tvekan mer användbart för att extrahera sökvägen från en absolut filväg:

Dim fso As New Scripting.FileSystemObject
Debug.Print fso.GetParentFolderName("C:\Users\Me\My Documents\SomeFile.txt")

Skriver ut C:\Users\Me\My Documents

Observera att avkänningsvägsavskiljaren inte ingår i den returnerade strängen.

Använd FSO.BuildPath för att bygga en fullständig sökväg från mappens sökväg och filnamn

Om du accepterar användarinmatning för mappsökvägar, kan du behöva kontrollera om det finns backspärr ( \ ) innan du bygger en filväg. FSO.BuildPath metoden gör det enklare:

  Const sourceFilePath As String = "C:\Temp"  '<-- Without trailing backslash
  Const targetFilePath As String = "C:\Temp\" '<-- With trailing backslash

  Const fileName As String = "Results.txt"
  
  Dim FSO As FileSystemObject
  Set FSO = New FileSystemObject
  
  Debug.Print FSO.BuildPath(sourceFilePath, fileName)
  Debug.Print FSO.BuildPath(targetFilePath, fileName)

Produktion:

C:\Temp\Results.txt
C:\Temp\Results.txt