VBA
Scripting.FileSystemObject
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Creazione di un oggetto 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
Lettura di un file di testo utilizzando un 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
Creazione di un file di testo con 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
Scrivere su un file esistente con 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
Enumera i file in una directory usando FileSystemObject
Limitazione anticipata (richiede un riferimento a 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
Ritardato:
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
Elenca in modo ricorsivo cartelle e file
Early Bound (con riferimento a 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 quando chiamato con argomenti come: EnumerateFilesAndFolders "C:\Test"
C:\Test
Documents
Personal
Budget.xls
Recipes.doc
Work
Planning.doc
Downloads
FooBar.exe
ReadMe.txt
Output quando chiamato con argomenti come: EnumerateFilesAndFolders "C:\Test", 0
C:\Test
Documents
Downloads
ReadMe.txt
Output quando chiamato con argomenti come: EnumerateFilesAndFolders "C:\Test", 1, 4
C:\Test
Documents
Personal
Work
Downloads
FooBar.exe
ReadMe.txt
Estrai l'estensione del file da un nome file
Dim fso As New Scripting.FileSystemObject
Debug.Print fso.GetBaseName("MyFile.something.txt")
Stampa MyFile.something
Si noti che il metodo GetBaseName()
gestisce già più periodi in un nome file.
Recupera solo l'estensione da un nome file
Dim fso As New Scripting.FileSystemObject
Debug.Print fso.GetExtensionName("MyFile.something.txt")
Stampa txt
Si noti che il GetExtensionName()
gestisce già più periodi in un nome file.
Recupera solo il percorso da un percorso file
Il metodo GetParentFolderName restituisce la cartella principale per qualsiasi percorso. Anche se questo può essere utilizzato anche con le cartelle, è probabilmente più utile per estrarre il percorso da un percorso di file assoluto:
Dim fso As New Scripting.FileSystemObject
Debug.Print fso.GetParentFolderName("C:\Users\Me\My Documents\SomeFile.txt")
Stampa C:\Users\Me\My Documents
Si noti che il separatore del percorso finale non è incluso nella stringa restituita.
Utilizzo di FSO.BuildPath per creare un percorso completo dal percorso della cartella e dal nome del file
Se stai accettando l'input dell'utente per i percorsi delle cartelle, potresti dover controllare le barre retroverse ( \
) prima di creare un percorso file. Il metodo FSO.BuildPath
semplifica la procedura:
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)
Produzione:
C:\Temp\Results.txt
C:\Temp\Results.txt