How do I delete an image while it is in listview?

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I am trying to make this list view that shows images in a folder
<prelang="c#">
public void LoadData()
{

var imgList = Directory.GetFiles(directoryPath, "*.jpg", SearchOption.AllDirectories);
myListView.ItemsSource = imgList;

}

The ListView template is an Image and a button to delete the Image
The click event of the button is handled as follows

C#

private void DeleteImg(object sender, RoutedEventArgs e)
        {
            
            string delImg = (string)(sender as Button).DataContext;
            File.Delete(delImg);
            LoadData();
        }

I get the following error when I try to delete an image

System.IO.IOException: 'The process cannot access the file 'xyz' because it is being used by another process.'

xyz is the file name obviously

I think it's because the image is open in ListView
Any ideas how i can close the file before deleting it

What I have tried:

I tried
myListView.ItemsSource = null;
myListView.Items.Clear();
also:
System.GC.Collect();
System.GC.WaitForPendingFinalizers();

Posted 20-May-20 14:20pm

izz moe

Updated 21-May-20 6:56am

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2 solutions

Solution 1

Well, you can't delete a file that's in-use (if indeed it is your program that has it locked, I'd check with something like Process Explorer - Windows Sysinternals | Microsoft Docs[^] to see what's using it .... )

ok, so, I see 2 options ...
1) you 'queue' the files you want to delete, maybe write their names to a text file, when your program exits, you spawn a quick program to read the text file's contents being the fully qualified image filenames, and delete them
2) I'm not sure how your program is loading the images, but I would generate a thumb-nail in-memory of an image, and use that in the listview, that way you're not locking the original 'master' on disk

It's interesting that as you've tried,

myListView.ItemsSource = null;
myListView.Items.Clear();

doesnt work, it was my first thought, clear the listview and ?then the lock would go away, but there's obviously something I cant remember about using listview/images

Posted 20-May-20 20:31pm

Garth J Lancaster

Updated 20-May-20 20:32pm

v2

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izz moe · Accepted Answer · 2020-05-21T06:57:00

Thank you Garth J Lancaster for the response;

I finally found out this solution after hours of search

C#

public void LoadData()
{

var imgList = Directory.GetFiles(directoryPath, "*.jpg", SearchOption.AllDirectories);
myListView.ItemsSource = imgList;
foreach (string f in imgList)
            {

                var bi = new BitmapImage();
                bi.BeginInit();
                bi.CacheOption = BitmapCacheOption.OnLoad;
                bi.UriSource = new Uri(f);
                imgLister.Add(bi);
                bi.EndInit();
                bi.Freeze();
            }
}

Freeze() methode Frees up memory, and allows file to be deleted