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
StructRefPropertyType refType = (StructRefPropertyType) prop.getType( );
		refType.resolve( module, prop, ref );
		if ( ref.isResolved( ) )
			ref.getTargetStructure( ).addClient( this, prop.getName( ) );
		return ref;
	}
	/**
	 * Attempts to resolve an element reference property. If the property is
	 * empty, or the reference is already resolved, return true. If the
	 * reference is not resolved, attempt to resolve it. If it cannot be
	 * resolved, return false.
	 * 
	 * @param module
	 *            the module
	 * @param propName
	 *            the name of the property
	 * @return <code>true</code> if the property is resolved;
	 *         <code>false</code> otherwise.
	 */
	public boolean checkElementReference( Module module, String propName )
	{
		assert !StringUtil.isBlank( propName );
		
		Object value = propValues.get( propName );
		if ( value == null )
			return true;
		
		ElementPropertyDefn prop = getPropertyDefn( propName );