Bug 201236 Issue about Allow multiple and duplicate values in Layout preview[0705]
Description: Issue about Allow multiple and duplicate values in Layout preview Build number:2.2.1.v20070827 Steps to reproduce: 1. New sample data source and dataset from CUSTOMERS. 2. New a parameter p1, listbox, dynamic, value field COUNTRY, tick on allow duplicate value, tick on allow multiple values. 3. Insert a data item to Layout, set expression as var values=""; for (i=0;i<params["p1"].value.length;i++) values=values+params["p1"].value[i]+"."; values; 4. In Layout, click Preview and select France. Expected result: Display one France. Actual result: Display several France. I tried the same action but preview in Web viewer and extenal html, the result is only one France. Error log:n/a
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/taglib/ParamDefTag.java
{
				
				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,
						this.pattern, value, this.locale );
			label = label != null ? label : ""; 
			writer.write( "<option value=\"" 
					+ ParameterAccessor.htmlEncode( displayValue ) + "\"" ); 
			if ( DataUtil.contain( this.valueStringList, displayValue ) )
				writer.write( " selected" ); 
			writer.write( ">" ); 
			writer.write( ParameterAccessor.htmlEncode( label ) );
			writer.write( "</option>\n" ); 
		}
		
		if ( !paramDef.isRequired( ) )
		{