Hi,

  I have writted a controller to check if attached is added or not on a custom object if not added it will show a message else submit for approval. 

  I want to redirect to same page where the user clicked the button from with page refresh I added below code but it is not working please suggest me how to modify the code. 

public class  check_spr_coterm
{
Integer count = 0;
String PageID; 
 public check_spr_coterm()
 {
   SPR__c SP;
   //OpportunityLineItem OLI;
     
   
   SP = [select id,Opportunity__c from SPR__c 
          where Id = : ApexPages.currentPage().getParameters().get('id') limit 1];
   
   PageID = ApexPages.currentPage().getParameters().get('id');
   
   List<AggregateResult> OLI = [select count(id) from OpportunityLineItem 
                                where opportunityid = :SP.Opportunity__c and name like '%COTERM%' ];
    
   List<AggregateResult>  ATH = [select count(id) athcnt from  Attachment 
                                 where parentid = :ApexPages.currentPage().getParameters().get('id')];  
   
   count = (Integer)ATH[0].get('athcnt');  
     
 }
 public void pageAction(){
     if(count ==0){
         ApexPages.addMessage(new ApexPages.Message(ApexPages.severity.info,'You cannot submit as this record dont have attachment'));      
     }
     else
     {
        Approval.ProcessSubmitRequest req = new Approval.ProcessSubmitRequest();
        req.setObjectId(PageID);
        Approval.ProcessResult result = Approval.process(req);
        //ApexPages.addMessage(new ApexPages.Message(ApexPages.severity.info,'Sucessfully submitted for approval'));
        redirectpage();
      }
     
 }
 
 
 public PageReference redirectpage()
 {
   PageReference pageRef = new PageReference(PageID);
   pageRef.setRedirect(true);
   return pageRef;
 }
 
 
}