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
*            the property definition of the list property
	 * @param list
	 *            the structure list to check
	 * @param toAdd
	 *            the structure to add. This parameter maybe is
	 *            <code>null</code>.
	 * @throws PropertyValueException
	 *             if the structure list or the structure to add has any
	 *             semantic error..
	 */
	public void checkStructureList( Module module, PropertyDefn propDefn,
			List list, IStructure toAdd ) throws PropertyValueException
	{
		List errorList = StructureListValidator.getInstance( )
				.validateForAdding( getHandle( module ), propDefn, list, toAdd );
		if ( errorList.size( ) > 0 )
		{
			throw (PropertyValueException) errorList.get( 0 );
		}
	}
	/**
	 * Checks the parent element.
	 * 
	 * @param parent
	 *            the parent element
	 * @throws ExtendsException
	 *             throws <code>ExtendsException</code> if the parent element
	 *             is <code>NOT_FOUND</code>,<code>WRONG_TYPE</code>,
	 *             <code>SELF_EXTEND</code>,<code>CIRCULAR</code>.
	 */