Folder open permission in VB.NET

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I am opening a folder using

OpenFileDialog

in vb.net

but before opening it, i want to check whether it has permission to open or not.

I am already checking whether folder exist or not using

System.IO.Directory.Exists(Directory)

Now if folder exists then i want to check whether it has permission to open or not.

What I have tried:

VB

Dim bDoesItExist As Boolean = System.IO.Directory.Exists(sDirectory)
Return bDoesItExist

to check folder exists or not

Posted 23-Aug-21 21:56pm

Devendra Sarang

Updated 5-Dec-22 4:54am

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OriginalGriff · Answer 1 · 2021-08-23T22:23:00

Try this:

C#

DirectorySecurity ds = Directory.GetAccessControl(@"C:\Program Files");
foreach (FileSystemAccessRule rule in ds.GetAccessRules(true, true, typeof(NTAccount)))
    {
    Console.WriteLine($"Account:{rule.IdentityReference.Value}\n   {rule.FileSystemRights}:{rule.AccessControlType}");
    }

Or (auto translated to child code):

VB

Dim ds As DirectorySecurity = Directory.GetAccessControl("C:\Program Files")

For Each rule As FileSystemAccessRule In ds.GetAccessRules(True, True, GetType(NTAccount))
    Console.WriteLine($"Account:{rule.IdentityReference.Value}\n   {rule.FileSystemRights}:{rule.AccessControlType}")
Next

You should be able to work it out from there.

Maciej Los · Answer 2 · 2021-08-23T23:25:00

There's no other way ;) to check if a user has permissions to read/write in/to specific folder than to access it.

For example:

VB.NET

Dim myfolder As String = "C:\Windows\" 'must ends with "\"

'try to open folder
Try
	Process.Start("explorer.exe", myfolder) 'folder will be opened via explorer if user has got sufficient permissions
Catch Ex As Exception
	Console.WriteLine(Ex.Message)
End Try

More at: Try...Catch...Finally statement - Visual Basic | Microsoft Docs[^]

Devendra Sarang · Answer 3 · 2021-08-24T00:31:00

i am using this code.

VB

Dim myinfo As New DirectoryInfo(sDirectory)
Dim dSecurity As DirectorySecurity = myinfo.GetAccessControl()

Dim fSecurity As AuthorizationRuleCollection = _
dSecurity.GetAccessRules(True, True,
Type.GetType("System.Security.Principal.NTAccount"))

For Each myacc As Security.AccessControl.AccessRule In fSecurity
				 
	If (acc.AccessControlType = AccessControlType.Allow) Then
		Return True
	ElseIf (acc.AccessControlType = AccessControlType.Deny) Then
		Return False
	End If
Next

but need more testing

Folder open permission in VB.NET

3 solutions

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