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 if the element has user properties, false if not.
	 */
	public boolean hasUserProperties( )
	{
		return userProperties != null && !userProperties.isEmpty( );
	}
	/**
	 * Checks if this element has any locally-defined property values.
	 * 
	 * @return True if the element has property values, false if not.
	 */
	public boolean hasLocalPropertyValues( )
	{
		return !propValues.isEmpty( );
	}
	/**
	 * Returns the container interface for this element if this element is a
	 * container. Derived classes that represent containers must override this.
	 * <p>
	 * Part of: Containment system.
	 * 
	 * @param slot
	 *            the slot ID to get
	 * @return The container interface, or null if this element is not a
	 *         container.
	 */
	public ContainerSlot getSlot( int slot )
	{
		return null;
	}