mru.CheckAccess() confirms acces to not existing file

Question

Hello,

I have an ListView where I show recently used files. Now wehen user clicks on any item i read selected file. I use such code.

private async void lvRecentlyUsedFiles_ItemClick(object sender, ItemClickEventArgs e)        
{            
	if (e.ClickedItem is IStorageItem isi && isi is StorageFile sf)            
	{                
	var mru = 		Windows.Storage.AccessCache.StorageApplicationPermissions.MostRecentlyUsedList;
                
	if(mru.CheckAccess(sf))                    
           ReadFile(sf);//this function reads file
            
	}        
}

The problem is that code mru.CheckAccess(sf) - confirms acces to files that don't exists. Isn't it a bug? How to check if file exists in my case?

Answer 1

Hi @BitSmithy ,

Welcome to Microsoft Q&A!

In the CheckAccess document.

Determines whether the app has access to the specified storage item in the most recently used (MRU) list.

CheckAccess only checks the permissions of the file in the MRU, not the file itself, so it cannot check if the file still exists.

If you use the Remove method to remove the file in MRU list, then CheckAccess will return false.

Windows.Storage.AccessCache.StorageApplicationPermissions.MostRecentlyUsedList.Remove(mruToken);

Thank you.

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Answer 2

Isn't it a bug?

MRU = Most recently used, what does not mean, the file still exist; no bug, by design.