hi friends,

iam using  rerender to display  2 output panels <apex:page controller="ClusterVfController">

action support is calling the controller for first time coreectly.

when i try to change the data without selecting the data for mandat feils the controller is not called and the old data is populated only how can i overcome this.

here is my Vf page

<apex:form >
<apex:messages />
<apex:pageblock title="Company Movement">
 <apex:pageblockSection title="SME Logo1 ">
     <apex:outputLabel id="Logo1" value="Logo1:">
         <apex:inputField id="log" value="{!log.SME_Logo1__c}">
         <apex:actionSupport event="onchange" action="{!Accwrappermethod}" reRender="ParentChildDts,xyz"/>
         </apex:inputField>
      </apex:outputLabel>
  </apex:pageblockSection>  
 
    <apex:outputPanel id="ParentChildDts" >
    <apex:outputPanel rendered="{!isnotblank}">
    <apex:pageBlockTable value="{!accwrapperlist}" var="accwr" id="AccTable">       
                  <apex:column >
                      <apex:facet name="header">
                         <apex:inputCheckbox >
                            <apex:actionSupport event="onclick"  onsubmit="checkAll(this)" reRender=""/>
                         </apex:inputCheckbox>
                      </apex:facet>
                        <apex:inputCheckBox value="{!accwr.isSelected}" id="testchk"/>
                  </apex:column>                
                                   
                    <apex:column headerValue="Account ID" width="45%">
                        {!accwr.acc1.Id}
                    </apex:column>                   
                    <apex:column headerValue="Account Name" width="25%">
                        {!accwr.acc1.Name}
                   </apex:column>
     </apex:pageBlockTable>
     </apex:outputPanel>
     </apex:outputPanel> 
  
<apex:outputPanel id="xyz">   
       <apex:pageblockSection title="SME Logo2 " rendered="{!isnotblank}">
         <apex:outputLabel id="Logo2" value="Logo2:"> 
             <apex:inputField id="log2" required="true"  value="{!log2.SME_Logo1__c}"/>  
              </apex:outputLabel>
        <apex:commandButton value="Transfer" action="{!transferaccount}"/>
       </apex:pageblockSection>
   </apex:outputPanel>
  
     </apex:pageblock>
</apex:form>
<script>
        function checkAll(cb)
        {
            var inputElem = document.getElementsByTagName("input");
            for(var i=0; i<inputElem.length; i++)
            {
                if(inputElem[i].id.indexOf("testchk")!=-1)
                inputElem[i].checked = cb.checked;
            }
            return false;
        }
</script>
      
</apex:page>

Here is my controller on custom object

public class ClusterVfController{
       
        public boolean isnotblank{get;set;}
       
 //   Declare one wrapper class to maintain checkbox status
    public class accWrapper {
        public Account acc1{get;set;}
        public Boolean isSelected { get; set; }
        public accWrapper() {
              acc1= new Account();
              isSelected  = false;       
        }               
        public accWrapper(Account acc1, Boolean isSelected) {
             this.acc1=acc1;
             this.isSelected  = isSelected;
        }                      
    }

public ClusterVfController(){
  log = new Logo__c();
  log2 = new Logo__c();
  isnotblank=false; 
 system.debug('=====LogoController=========isnotblank==================='+isnotblank);

 }
public Map<Id, Account> SelctParentLogomap = new Map<Id, Account>();   
public Logo__c log{get;set;}
public Logo__c log2{get;set;}
      
 public List<accWrapper> accwrapperlist{get;set;}

 public String getLog() {
 system.debug('=======getLog=======isnotblank==================='+isnotblank);
   return null;
 }
 
    public void  accwrappermethod(){       
       accwrapperlist = new List<accWrapper>();
       system.debug('save===log======'+log);
       selctParentLogomap =new Map<Id, Account>([Select id,name from Account where ParentId=:log.SME_Logo1__c]);
      
       system.debug('+++++++++++SelctParentLogomap ++++++++:::::'+ SelctParentLogomap.size());
       for(Account acc1: SelctParentLogomap.values()){
          accwrapperlist.add(new accWrapper(acc1,false));
       } 
       if(accwrapperlist.size()>0){
              isnotblank=true;
       }else{
              isnotblank=false;
        }
      system.debug('===================isnotblank========='+isnotblank);

       //return accwrapperlist;
    }
public pageReference transferaccount (){
system.debug('save===log2======'+log2);
system.debug('&&&log2 ---------------------OwnerId&&&'+log2.ownerid);
Account acc2 =[select id,ownerid from account where id=:log2.SME_Logo1__c];
system.debug('save===acc2 id======'+acc2.id);

list<Account> acclist=new list<Account>();

for(accWrapper wrap1: accwrapperlist){
if(wrap1.isSelected==true){
wrap1.acc1.OwnerId=acc2.ownerid;
acclist.add(wrap1.acc1);
}
}
try{
system.debug('****acclist*****'+acclist);
update acclist;
}catch(Exception e){
ApexPages.addMessage(new ApexPages.Message(ApexPages.Severity.FATAL,e.getMessage()));
}
PageReference assignmentpage = ApexPages.currentPage();
assignmentpage.setRedirect(true);
return null;
}

}

Thanks in advance