How to pass selected multiselect picklist and pageblock table values from one vf page to another

Question

I have a multiselect picklist and pageblock table in a visualforce page i want to send the selected multiselect picklist value and modified page block table value to the next visualforce page

This is my vf page code

<apex:pageBlockSection title="Filter based on profiles" collapsible="true" >
     <apex:selectList style="margin-left: 60%;width:150%"  value="{!multival}" size="10" multiselect="true" >
          <apex:selectOptions value="{!Name}"></apex:selectOptions>
     </apex:selectList> 
</apex:pageBlockSection>
<apex:commandButton style="margin-left: 30%;width:5%" value="Next" action="{!redirect}"/> 

This is my first controller code

public String multival {get;set;}
public pagereference redirect(){ 
      PageReference redirect = new PageReference('/apex/nextPage?att='+multival);
      redirect.setRedirect(true);
      return redirect;      

}

This is my second controller code

public class selectedList {
    public String multival {get;set;}
    public selectedList (){
         multival = ApexPages.currentPage().getParameters().get('att');
    }
}

How do i pass the selected multiselect picklist value to my nextpage?

Answer 1

Your approach will work. You will get selected values in first vf page in multival variable in controller of nextpage. If you debug multival in selectedList controller, output will look like:

DEBUG| [1, 4]

You need to extract values from this string as:

multival = ApexPages.currentPage().getParameters().get('att');
System.debug(multival);   //[1, 4]
String extractedVal = multival.remove('[').remove(']').deleteWhitespace();
System.debug(extractedVal);   //1,4

If you need values as a list, use:

List<String> extractedVals = extractedVal.split(',');
System.debug(extractedVals);   //(1, 4)