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
return getIntrinsicProperty( prop.getName( ) );
		}
		
		if ( prop.getTypeCode( ) == PropertyType.ELEMENT_REF_TYPE )
		{
			return resolveElementReference( module, prop );
		}
		
		if ( prop.getTypeCode( ) == PropertyType.STRUCT_REF_TYPE )
		{
			return resolveStructReference( module, prop );
		}
		
		return propValues.get( prop.getName( ) );
	}
	/**
	 * Returns the value of an intrinsic property. Derived classes should
	 * override this to handle their own intrinsics. Clients should call the
	 * getProperty( ) or getLocalProperty( ) methods instead of calling this
	 * method directly.
	 * 
	 * @param propName
	 *            name of the intrinsic
	 * @return the value of the requested property
	 */
	protected Object getIntrinsicProperty( String propName )
	{
		if ( NAME_PROP.equals( propName ) )
			return name;
		if ( EXTENDS_PROP.equals( propName ) )