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
value = style.getLocalProperty( module, prop );
			if ( value != null )
				return value;
		}
		return null;
	}
	/**
	 * Tests if the property is inheritable in the context.
	 * 
	 * @param prop
	 *            definition of the property to test
	 * @return <code>true</code> if the property is inheritable in the
	 *         context, otherwise, <code>false</code>.
	 */
	protected boolean isInheritableProperty( ElementPropertyDefn prop )
	{
		assert prop != null;
		return prop.canInherit( );
	}
	/**
	 * Gets a property value given its definition. This version does the
	 * property search as defined by the given derived component. That is, it
	 * gets the "effective" property value. The definition can be for a system
	 * or user-defined property.
	 * <p>
	 * The search won't search up the containment hierarchy. Meanwhile, it won't
	 * the inheritance hierarchy if the non-style property is not inheritable.
	 * <p>
	 * Part of: Property value system.
	 *