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( IBirtConstants.NULL_VALUE );
			writer.write( "</label>" ); 
			writer.write( "</input>\n" ); 
		}
	}
	/**
	 * Handle output List Box type parameter
	 * 
	 * @throws Exception
	 */
	protected void __handleListBox( ) throws Exception
	{
		if ( paramDef.getGroup( ) != null && paramDef.getGroup( ).cascade( ) )
		{
			JspWriter writer = pageContext.getOut( );
			
			if ( pageContext.findAttribute( IMPORT_FILES_ATTR ) == null )
			{
				String baseURL = "/webcontent/"; 
				if ( viewer.getBaseURL( ) != null )
				{
					baseURL = viewer.getBaseURL( ) + baseURL;
				}
				else
				{
					baseURL = ( (HttpServletRequest) pageContext.getRequest( ) )
							.getContextPath( )
							+ baseURL;
				}