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
writer.write( "<select " ); 
		writer.write( " id=\"" + encParamId + "\"" ); 			
		__handleGeneralDefinition( );
		writer.write( " onchange=\"" + onChange + "\"" ); 
		writer.write( " >\n" ); 
		
		if ( !paramDef.isRequired( ) )
		{
			writer.write( "<option value='' " ); 
			if ( param.getValue( ) != null
					&& DataUtil.getString( param.getValue( ) ).length( ) <= 0 )
			{
				writer.write( " selected " ); 
				isSelected = true;
			}
			writer.write( "></option>\n" ); 
		}
		for ( Iterator iter = selectionList.iterator( ); iter.hasNext( ); )
		{
			ParameterSelectionChoice selectionItem = (ParameterSelectionChoice) iter
					.next( );
			Object value = selectionItem.getValue( );
			try
			{
				
				value = DataUtil.convert( value, paramDef.getDataType( ) );
			}
			catch ( Exception e )
			{