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Old September 15th, 2008, 03:22 PM
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Default Vista: Getfiles throws security error

Greetings,



I wrote a multi-threaded program that allows a user to click on a folder and then get all pdf files in the folder and all subfolders under that folder. I then loop through the pdf files and get the number of pages each has.



It works fine except, on Vista machines. If I click on a user folder in My Documents, I get an exception that says "Access to path c:\Users\Username\Templates" is denied.



I can't elevate the request execution level because the program uses Click Once.



I need to be able to loop through all folders, including the special ones.

If I can't do that, then I would like the program to continue processing the rest of the folders that it is allowed to access. Then I can create an error log with the names of the folders that refuse access.



I have included a simplified version of the code below:



'This sub fires when the user clicks the Start button. It puts their path into the variable strPath

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

    ' First create a FolderBrowserDialog object

    Dim FolderBrowserDialog1 As New FolderBrowserDialog

    ' Then use the following code to create the Dialog window

    ' Change the .SelectedPath property to the default location

    With FolderBrowserDialog1

        .ShowNewFolderButton = False

        .RootFolder = Environment.SpecialFolder.Desktop

        ' Prompt the user with a custom message."

        .Description = "Select the source directory"

        If .ShowDialog = DialogResult.OK Then

            strpath = .SelectedPath

            ProcessAllDirectories(strpath, objArrayList) ' These parameters are global

        End If

    End With

End Sub





ProcessAllDirectories(strpath, objArrayList)

Public Sub ProcessAllDirectories(ByVal strPath As String, ByRef objArrayList As ArrayList)

    objDirectoryInfo = New DirectoryInfo(strPath)

    t = New Threading.Thread(AddressOf ProcessDirectory)

    t.IsBackground = True

    t.Start()

End Sub





Public Sub ProcessDirectory()

    Dim objFiles As FileInfo()

    Dim objFileInfo As FileInfo



    If objDirectoryInfo.GetFiles().Length > 0 Then

        objFiles = objDirectoryInfo.GetFiles("*.pdf", SearchOption.AllDirectories) ' This line throws the exception

        For Each objFileInfo In objFiles

            'Do processing and counting here

        Next

    End If

End Sub

 
Old February 9th, 2009, 04:47 PM
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Default

Quote:
Originally Posted by sigilaea View Post
If I can't do that, then I would like the program to continue processing the rest
On Error Resume Next
 
Old February 9th, 2009, 06:00 PM
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Default

Please please please don't use on error resume next.. Patrick that's a vb 6 (and early) statement.
In vb.net, you can use a try.. catch statement to get the exception you need. Even if you don't do anything with it, you can continue from them.
Since you are having this problem, the best you can do is loop manually through all the folder to skip the ones you have problems with.
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HTH

Gonzalo


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