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
* @param slotID
	 *            the slot ID in this element
	 * @return true if this element and its contents are managed by namespace,
	 *         otherwise false
	 */
	public boolean isManagedByNameSpace( int slotID )
	{
		
		if ( getRoot( ) == null )
			return false;
		
		DesignElement containerObj = this;
		int slot = slotID;
		while ( containerObj != null )
		{
			ElementDefn defn = (ElementDefn) containerObj.getDefn( );
			SlotDefn slotInfo = (SlotDefn) defn.getSlot( slot );
			if ( slotInfo != null && !slotInfo.isManagedByNameSpace( ) )
				return false;
			slot = containerObj.getContainerSlot( );
			containerObj = containerObj.getContainer( );
		}
		return true;
	}
	/**
	 * Determines whether this element is managed by namespace. If this element
	 * is a pending node or the container is not managed by the namespace,
	 * return false. Otherwise true.
	 * 
	 * @return true if this element is managed by namespace, otherwise false