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/command/ContentRecord.java
}
	/**
	 * Initializes the record.
	 * 
	 * @param containerObj
	 *            the container element
	 * @param theSlot
	 *            the slotID in which to put the content
	 * @param contentObj
	 *            the content object to add or remove
	 * @param newPos
	 *            the position index at which the new content is to be inserted
	 * @param isAdd
	 *            whether to add or remove the item
	 */
	private void init( DesignElement containerObj, int theSlot,
			DesignElement contentObj, int newPos, boolean isAdd )
	{
		container = containerObj;
		slotID = theSlot;
		content = contentObj;
		add = isAdd;
		
		assert newPos >= -1;
		assert container != null;
		assert content != null;
		assert isAdd && content.getContainer( ) == null || !isAdd
				&& content.getContainer( ) != null;
		assert container.getDefn( ).getSlot( slotID ).canContain( content );
		ContainerSlot slot = container.getSlot( slotID );