scottsilvi
asked on
recursive file.copy loop locks application
This loops works great to perform a recursive file copy, however, it locks up the form quite easily.
Any ideas of a better way to recursively copy files? If i put it in a class will that help?
Any ideas of a better way to recursively copy files? If i put it in a class will that help?
' Usage:
' Copy Recursive with Overwrite if exists.
' RecursiveDirectoryCopy("C:\Data", "D:\Data", True, True)
' Copy Recursive without Overwriting.
' RecursiveDirectoryCopy("C:\Data", "D:\Data", True, False)
' Copy this directory Only. Overwrite if exists.
' RecursiveDirectoryCopy("C:\Data", "D:\Data", False, True)
' Copy this directory only without overwriting.
' RecursiveDirectoryCopy("C:\Data", "D:\Data", False, False)
' Recursively copy all files and subdirectories from the specified source to the specified
' destination.
Private Sub RecursiveDirectoryCopy(ByVal sourceDir As String, ByVal destDir As String, ByVal fRecursive As Boolean, ByVal overWrite As Boolean)
Dim sDir As String
Dim dDirInfo As IO.DirectoryInfo
Dim sDirInfo As IO.DirectoryInfo
Dim sFile As String
Dim sFileInfo As IO.FileInfo
Dim dFileInfo As IO.FileInfo
' Add trailing separators to the supplied paths if they don't exist.
If Not sourceDir.EndsWith(System.IO.Path.DirectorySeparatorChar.ToString()) Then
sourceDir &= System.IO.Path.DirectorySeparatorChar
End If
If Not destDir.EndsWith(System.IO.Path.DirectorySeparatorChar.ToString()) Then
destDir &= System.IO.Path.DirectorySeparatorChar
End If
'If destination directory does not exist, create it.
dDirInfo = New System.IO.DirectoryInfo(destDir)
If dDirInfo.Exists = False Then dDirInfo.Create()
dDirInfo = Nothing
' Recursive switch to continue drilling down into directory structure.
If fRecursive Then
' Get a list of directories from the current parent.
For Each sDir In System.IO.Directory.GetDirectories(sourceDir)
sDirInfo = New System.IO.DirectoryInfo(sDir)
dDirInfo = New System.IO.DirectoryInfo(destDir & sDirInfo.Name)
' Create the directory if it does not exist.
If dDirInfo.Exists = False Then dDirInfo.Create()
' Since we are in recursive mode, copy the children also
RecursiveDirectoryCopy(sDirInfo.FullName, dDirInfo.FullName, fRecursive, overWrite)
sDirInfo = Nothing
dDirInfo = Nothing
Next
End If
' Get the files from the current parent.
For Each sFile In System.IO.Directory.GetFiles(sourceDir)
sFileInfo = New System.IO.FileInfo(sFile)
dFileInfo = New System.IO.FileInfo(Replace(sFile, sourceDir, destDir))
'If File does not exist. Copy.
If dFileInfo.Exists = False Then
sFileInfo.CopyTo(dFileInfo.FullName, overWrite)
Else
'If file exists and is the same length (size). Skip.
'If file exists and is of different Length (size) and overwrite = True. Copy
If sFileInfo.Length <> dFileInfo.Length AndAlso overWrite Then
sFileInfo.CopyTo(dFileInfo.FullName, overWrite)
'If file exists and is of different Length (size) and overwrite = False. Skip
ElseIf sFileInfo.Length <> dFileInfo.Length AndAlso Not overWrite Then
Debug.WriteLine(sFileInfo.FullName & " Not copied.")
End If
End If
sFileInfo = Nothing
dFileInfo = Nothing
Next
End Sub
You can alleviate the "lock" factor by placing a call to Application.DoEvents() inside each of your inner loops. But this will only work up to a certain point because the CopyTo() call is actually a blocking call. If you have a large file then it will just sit there until the copy is complete.
You can't really add a progressbar to the existing code because with a recursive routine you don't actually know how many items you are dealing with! For that to work you would have to make TWO complete passes...one to only count the files that will be copied, and another to actually copy the files.
You can't really add a progressbar to the existing code because with a recursive routine you don't actually know how many items you are dealing with! For that to work you would have to make TWO complete passes...one to only count the files that will be copied, and another to actually copy the files.
ASKER
is there a better way to copy files in vb.net then?
Further i want a progress bar for the FILE being copied not the FILES.
Further i want a progress bar for the FILE being copied not the FILES.
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