<h:SelectManyListbox> - How to use this tag ??

[Anand Gondhiya]

Hi Everyone,

I am new to JSF. I was able to create UI components such as dropdown menu, text area and text box, radio button etc. However i am having a trouble with drop down menu which allows multiple item selection. I am using <h:SelectManyListbox> tag for that. Here is the code in JavaBean and JSP:

Problem Descritption: When I load the JSP for the first time, I renders the multiple dropdown menu fine. The problem is when I try to navigate to other pages , It shows error in logs:

sourceId=createForm:Etiology[severity=(ERROR 2), summary=(createForm:Etiology: An error occurred when processing your submitted information. ), detail=(createForm:Etiology: An error occurred when processing your submitted information. )]

public ArrayList<String> getEtiologyStr() {
		return etiologyStr;
	}

	public void setEtiologyStr(ArrayList<String> etiologyStr) {
		etiologyStr = new ArrayList<String> ();
		this.etiologyStr = etiologyStr;
	}

	public ArrayList<SelectItem> getEtiology() {
		ArrayList<SelectItem> etiology = new ArrayList<SelectItem> ();
		etiology.add(new SelectItem("Adenovirus","Adenovirus"));
		etiology.add(new SelectItem("Arbovirus","Arbovirus"));
		etiology.add(new SelectItem("Aspergillus","Aspergillus"));
		return etiology;
	}
	public void setEtiology(ArrayList<SelectItem> etiology) {
		this.etiology = etiology;
	}
    

Code in JSP:

 <td>
              <h:selectManyListbox  id="Etiology"  value="#{InfectionBean.etiologyStr}" size="5" >
                 <f:selectItems value="#{InfectionBean.etiology}" />
              </h:selectManyListbox>
           </td> 
 

Entry in faces-config.xml

  <managed-bean>
   		<managed-bean-name>InfectionBean</managed-bean-name>
   		<managed-bean-class>doh.nosoco.beans.InfectionBean</managed-bean-class>
   		<managed-bean-scope>session</managed-bean-scope>
   </managed-bean>  

can someone guide me what am I doign wrong. I unfortunately couldn't find any working examples on the web which shows the usage of this UI Component.

Thanks everyone
- Anand