internal void OnQueryItems(QueryItemsEventArgs e)
 {
     if (this.QueryItems != null)
     {
         this.QueryItems(this, e);
     }
 }
        internal void OnQueryItems(AsyncQueryInfo asyncQueryInfo, DataGridVirtualizingCollectionViewGroup collectionViewGroup)
        {
            QueryItemsEventArgs e = new QueryItemsEventArgs(this, collectionViewGroup, asyncQueryInfo);

            if (this.QueryItems != null)
            {
                this.QueryItems(this, e);
            }

            DataGridVirtualizingCollectionViewSource source = this.ParentCollectionViewSourceBase as DataGridVirtualizingCollectionViewSource;

            if (source != null)
            {
                source.OnQueryItems(e);
            }
        }
    internal void OnQueryItems( AsyncQueryInfo asyncQueryInfo, DataGridVirtualizingCollectionViewGroup collectionViewGroup )
    {
      QueryItemsEventArgs e = new QueryItemsEventArgs( this, collectionViewGroup, asyncQueryInfo );

      if( this.QueryItems != null )
        this.QueryItems( this, e );

      DataGridVirtualizingCollectionViewSource source = this.ParentCollectionViewSourceBase as DataGridVirtualizingCollectionViewSource;

      if( source != null )
        source.OnQueryItems( e );
    }
 internal void OnQueryItems( QueryItemsEventArgs e )
 {
   if( this.QueryItems != null )
     this.QueryItems( this, e );
 }