public ListViewItem this[int displayIndex]
{
get
{
_owner.ApplyUpdateCachedItems();
if (_owner.VirtualMode)
{
// if we are showing virtual items, we need to get the item from the user
RetrieveVirtualItemEventArgs rVI = new RetrieveVirtualItemEventArgs(displayIndex);
_owner.OnRetrieveVirtualItem(rVI);
rVI.Item !.SetItemIndex(_owner, displayIndex);
return(rVI.Item);
}
else
{
if (displayIndex < 0 || displayIndex >= _owner._itemCount)
{
throw new ArgumentOutOfRangeException(nameof(displayIndex), displayIndex, string.Format(SR.InvalidArgument, nameof(displayIndex), displayIndex));
}
if (_owner.IsHandleCreated && !_owner.ListViewHandleDestroyed)
{
return((ListViewItem)_owner._listItemsTable[DisplayIndexToID(displayIndex)]);
}
else
{
Debug.Assert(_owner._listViewItems is not null, "listItemsArray is null, but the handle isn't created");
return(_owner._listViewItems[displayIndex]);
}
}
}
set
{
_owner.ApplyUpdateCachedItems();
if (_owner.VirtualMode)
{
throw new InvalidOperationException(SR.ListViewCantModifyTheItemCollInAVirtualListView);
}
if (displayIndex < 0 || displayIndex >= _owner._itemCount)
{
throw new ArgumentOutOfRangeException(nameof(displayIndex), displayIndex, string.Format(SR.InvalidArgument, nameof(displayIndex), displayIndex));
}
if (_owner.ExpectingMouseUp)
{
_owner.ItemCollectionChangedInMouseDown = true;
}
RemoveAt(displayIndex);
Insert(displayIndex, value);
}
}