internal DataGridVirtualizingQueryableCollectionViewGroupRoot(
DataGridVirtualizingQueryableCollectionView collectionView,
object pageManagerSyncRoot,
bool isBottomLevel)
: base(null, -1, 0, null, -1, isBottomLevel)
{
m_parentCollectionView = collectionView;
m_queryableSource = m_parentCollectionView.QueryableSource;
if (m_queryableSource != null)
{
m_primaryKeyPropertyNames = m_queryableSource.FindPrimaryKeys();
// Primary key optimizations are only possible when only one primary key is identified in the source.
// When dealing with sources defining more than one primary key, we would need to know in which order
bool supportsPrimaryKeyOptimizations = ((m_primaryKeyPropertyNames != null) && (m_primaryKeyPropertyNames.Length == 1));
m_virtualPageManager = new DataGridLINQPageManager(collectionView,
pageManagerSyncRoot,
supportsPrimaryKeyOptimizations);
}
}
internal DataGridVirtualizingQueryableCollectionViewGroupRoot(
DataGridVirtualizingQueryableCollectionView collectionView,
object pageManagerSyncRoot,
bool isBottomLevel )
: base( null, -1, 0, null, -1, isBottomLevel )
{
m_parentCollectionView = collectionView;
m_queryableSource = m_parentCollectionView.QueryableSource;
if( m_queryableSource != null )
{
m_primaryKeyPropertyNames = m_queryableSource.FindPrimaryKeys();
// Primary key optimizations are only possible when only one primary key is identified in the source.
// When dealing with sources defining more than one primary key, we would need to know in which order
bool supportsPrimaryKeyOptimizations = ( ( m_primaryKeyPropertyNames != null ) && ( m_primaryKeyPropertyNames.Length == 1 ) );
m_virtualPageManager = new DataGridLINQPageManager( collectionView,
pageManagerSyncRoot,
supportsPrimaryKeyOptimizations );
}
}