How can I create a file extension filter?

Shell for WPF Forum

Posted 1 year ago by JP Garza
Version: 19.1.0685

I was wondering what is the best way to create a ShellTreeListBox DataFilter that filters file types/extensions. I would like to display only files that end on .sq or .txt


Comments (3)

Answer - Posted 1 year ago by JP Garza

This appears to work:

private IDataFilter _folderExplorerDataFilter = new PredicateFilter(i => 
    var shellObjectVM = (ShellObjectViewModel)i;
    var supportedFileTypes = new[] { ".sq", ".txt" };
    return (shellObjectVM.IsFolder) ? true : supportedFileTypes.Any(shellObjectVM.Name.EndsWith); 

[Modified 1 year ago]

Posted 1 year ago by Actipro Software Support - Cleveland, OH, USA

Hi JP,

Yes predicate filters would work fine for that kind of thing.

Actipro Software Support

Posted 1 year ago by JP Garza

Alright, thank you!

The latest build of this product (v22.1.3) was released 27 days ago, which was after the last post in this thread.

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