Bug 188596 Some parameter value cannot be passed to report through URL[0002]
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/presentation/aggregation/parameter/ComboBoxParameterFragment.java
Object value = selectionItem.getValue( );
				try
				{
					
					value = DataUtil.convert( value, paramDef.getDataType( ) );
				}
				catch ( Exception e )
				{
					value = null;
				}
				
				String displayValue = DataUtil.getDisplayValue( value );
				if ( displayValue == null )
					continue;
				String label = selectionItem.getLabel( );
				if ( label == null || label.length( ) <= 0 )
				{
					
					
					label = ParameterValidationUtil.getDisplayValue( null,
							paramDef.getPattern( ), value, locale );
				}
				if ( label == null )
					continue;
				selectionItem.setLabel( label );
				selectionItem.setValue( displayValue );
				parameterBean.getSelectionList( ).add( selectionItem );
				
				if ( displayValue.equals( parameterBean.getValue( ) ) )
				{