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/Module.java
{
				IValidationListener listener = (IValidationListener) iter
						.next( );
				listener.elementValidated( element.getHandle( this ), event );
			}
		}
	}
	/**
	 * Makes a unique name for an element. There are several cases.
	 * <p>
	 * <dl>
	 * <dt>Blank name, name is optional</dt>
	 * <dd>Leave the name blank, for some elements the name is optional.</dd>
	 * 
	 * <dt>Blank name, name is required</dt>
	 * <dd>Create a default name of the form "NewTable" where "New" is
	 * localized, and "Table" is the localized element name for creating a new
	 * element.</dd>
	 * 
	 * <dt>Name already exists in the name space</dt>
	 * <dd>This can occur either for the name provided, or for the default name
	 * created above. Add a number suffix to make the name unique. Example:
	 * "MyName4".</dd>
	 * </dl>
	 * 
	 * @param element
	 *            element for which to create a unique name
	 */
	public void makeUniqueName( DesignElement element )
	{