When dragging and dropping ListView items, use e.Data.SetDataProvider (StandardDataFormats. StorageItems, MyDataProviderHandle) ; Unable to implement delayed data provision.

[a2596519067]

Describe the bug

When dragging and dropping ListView items, use e.Data.SetDataProvider(StandardDataFormats. StorageItems, MyDataProviderHandle) ; Unable to implement delayed data provision.
I want to use e.Data.SetDataProvider() to delay providing data because I have a very time-consuming operation (decompressing files), but when dragging, it displays a prohibition symbol and cannot complete sharing files. According to the official documentation, this method is specifically designed to handle time-consuming operations, but we are unable to provide this requirement at this time. I am not sure if there is a problem with my code.

Steps to reproduce the bug

My Code

I use Task.Delay(10000) to simulate time-consuming tasks

I have set the DragitemsStarting event handler FileList_DragitemsStarting in the ListView.
I dragged the control to the desktop.

Expected behavior

No response

Screenshots

Unable to drag

I dragged the control to the desktop.

Official documents

NuGet package version

WinUI 3 - Windows App SDK 1.5.3: 1.5.240428000

Windows version

Windows 11 (22H2): Build 22621

Additional context

No response

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