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
if ( isRootIncludedByModule( ) )
			return false;
		if ( !canContainTemplateElement( module, slotId, defn ) )
			return false;
		
		
		if ( isVirtualElement( ) || getExtendsElement( ) != null )
			return false;
		
		DesignElement tmpContainer = this;
		while ( tmpContainer != null )
		{
			if ( tmpContainer instanceof ListingElement )
			{
				List errors = tmpContainer.checkContent( module, this, slotId,
						defn );
				return errors.isEmpty( );
			}
			tmpContainer = tmpContainer.getContainer( );
		}
		return retValue;
	}
	/**
	 * Checks whether a type of elements can reside in the given slot of the
	 * current element. Besides the type check, it also checks the cardinality
	 * of this slot.
	 * 
	 * @param slotId