Hello all,

I have a customl listbox control that inherits from listbox and implements the INotifyPropertyChanged interface. I would like to modify the default behavior of listbox so that it only calls the getter on visible items. I am planning on replacing my current custom DAL with an ORM and this behavior would be desirable because it would allow me to utilize lazy loading to only load what is currently needed.

Thanks in advance,

Dustin

I could be misunderstanding you but it sounds like you want a virtual ListBox. I don't think the Windows Forms ListBox provides any support for this. The Windows Forms ListView does support virtualization however. Is there any chance you could usea ListViewinstead of a ListBox? With the ListView's VirtualMode property set to true you no longer populate its Items collection but instead you handle the RetrieveVirtualItem event to tell the ListView what to display. The ListView will only request information about visible (or partially visible) items.