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( "<option value=''" ); 
			if ( DataUtil.contain( this.valueStringList, null ) )
				writer.write( " selected" ); 					
			writer.write( " >" ); 
			writer.write( IBirtConstants.NULL_VALUE + "</option>\n" ); 
		}
		writer.write( "</select>\n" ); 
		writer.write( "\n<script language=\"JavaScript\">\n" ); 
		writer.write( "var selectCtl = document.getElementById(\"" 
				+ encParamId + "\");\n" ); 
		writer.write( "if( selectCtl.options.length > 8 )\n" ); 
		writer.write( "  selectCtl.size = 8;\n" ); 
		writer.write( "else\n" ); 
		writer.write( "  selectCtl.size = selectCtl.options.length;\n" ); 
		writer.write( "handleParam" + encParamId + "( selectCtl );\n" ); 
		writer.write( "</script>\n" ); 
	}
	/**
	 * Handle Common List/Combo Box type parameter( not cascading parameter )
	 * 
	 * @param selectionList
	 * 
	 * @throws Exception
	 */
	protected void __handleCommonListBox( Collection selectionList )
			throws Exception
	{
		JspWriter writer = pageContext.getOut( );
		String encParamId = ParameterAccessor.htmlEncode( param.getId( ) );
		String encParamName = ParameterAccessor.htmlEncode( param.getName( ) );