protected override int OnQueryItemCountCore(VirtualList virtualList)
{
if (!this.IsConnected)
{
return(0);
}
DataGridVirtualizingCollectionView collectionView = this.CollectionView as DataGridVirtualizingCollectionView;
// The VirtualPageManager was Disposed
if (collectionView == null)
{
return(0);
}
DataGridVirtualizingCollectionViewGroup collectionViewGroup = this.GetLinkedCollectionViewGroup(virtualList) as DataGridVirtualizingCollectionViewGroup;
Debug.Assert((collectionViewGroup != null) && (collectionView != null));
return(collectionView.OnQueryItemCount(collectionViewGroup));
}
internal override int QueryItemCount()
{
DataGridVirtualizingCollectionView collectionView = this.GetCollectionView() as DataGridVirtualizingCollectionView;
return(collectionView.OnQueryItemCount(this));
}