Bug 121352 The data set binding property cannot be retrieved in report preview layout
In report preview page, the datasource/dataset property binding lists cannot be retrieved. The dataset binding can not work correctly in layout preview because it's value cannot get from the binding list. But in the data set edit page, the binding value can be got. You can refer to the attachment.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/DesignElement.java
return true;
	}
	/**
	 * checks if the element contains any sub level element is a template.
	 * 
	 * @return true if contain template element, otherwise return false.
	 */
	private boolean isContainTamplateElement( )
	{
		boolean isFound = false;
		int slotCount = getDefn( ).getSlotCount( );
		for ( int i = 0; i < slotCount; i++ )
		{
			if ( isFound )
				break;
			ContainerSlot contentSlot = getSlot( i );
			Iterator iter = contentSlot.iterator( );
			while ( iter.hasNext( ) )
			{
				Object content = iter.next( );
				if ( content instanceof TemplateElement )
					isFound = true;
				else
					isFound = ( (DesignElement) content )
							.isContainTamplateElement( );
			}
		}
		return isFound;
	}
}