Directoryinfo exclude hidden folders

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I am creating a photo viewer app using WPF.
The UI lists the drives & folders in the left pane using a treeview; on the right pane, it lists all the photos in the selected folder in the treeview.

While looping and adding items to the folder treeview, how do I filter out hidden & non-accessible folders?

Here is the current code:

C#

private void LoadDrives()
{
    DriveInfo[] allDrives = DriveInfo.GetDrives();

    foreach (DriveInfo drive in allDrives)
    {
        if (drive.DriveType == DriveType.Fixed || 
                  drive.DriveType == DriveType.Removable)
        {
            var drivetvItem = new TreeViewItem();
            drivetvItem.Header = drive.Name;
            drivetvItem.Tag = drive.Name;

            LoadParentFolders(drive.Name, drivetvItem);

            CanvasFolderBrowser.Items.Add(drivetvItem);
        }
    }
}

private TreeViewItem LoadParentFolders(string drive, TreeViewItem drivetvItem)
{
    DirectoryInfo dirInfo = new DirectoryInfo(drive);
    DirectoryInfo[] dirInfoList = dirInfo.GetDirectories();

    foreach (DirectoryInfo dir in dirInfoList)
    {
        var directorytvItem = new TreeViewItem();
        directorytvItem.Header = dir.Name;
        directorytvItem.Tag = dir.FullName;

        LoadChildFolders(dir.FullName, directorytvItem);

        drivetvItem.Items.Add(directorytvItem);
    }

    return drivetvItem;
}

private TreeViewItem LoadChildFolders
(string parentfolder, TreeViewItem directorytvItem)
{
    DirectoryInfo dirInfo = new DirectoryInfo(parentfolder);
    DirectoryInfo[] dirInfoList = dirInfo.GetDirectories();

    foreach (DirectoryInfo dir in dirInfoList)
    {
        var subdirectorytvItem = new TreeViewItem();
        subdirectorytvItem.Header = dir.Name;
        subdirectorytvItem.Tag = dir.FullName;

        LoadChildFolders(dir.FullName, subdirectorytvItem);

        directorytvItem.Items.Add(subdirectorytvItem);
    }

    return directorytvItem;
}

What I have tried:

I know fileinfo has the GetAttributes method. I can't find something similar to that for directoryinfo.

Posted 5-Oct-23 1:35am

Christopher Fernandes

Updated 5-Oct-23 6:16am

Deeksha Shenoy

v2

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Graeme_Grant 5-Oct-23 7:50am

Are you asking us how to write a filter or how to do the filtering based on your criteria?

2 solutions

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Richard MacCutchan · Answer 1 · 2023-10-05T02:11:00

Solution 1

The FileSystemInfos detail works for directories as well as files, see DirectoryInfo.GetFileSystemInfos Method (System.IO) | Microsoft Learn[^].

Posted 5-Oct-23 2:11am

Richard MacCutchan

Richard Deeming · Answer 2 · 2023-10-05T02:37:00

Both DirectoryInfo and FileInfo inherit from FileSystemInfo, which provides the Attributes property[^].

NB: Neither class has a GetAttributes method. Perhaps you're thinking of File.GetAttributes[^], which works for files or directories. But that works with paths represented as strings, not FileInfo / DirectoryInfo instances.

NB2: The attributes are only part of the story as to whether a file or directory is accessible. For example, on an NTFS drive, the DACL[^] might not allow the current user to access the object.