Question

I implemented pagination on my visual force page looking at these two resources.
http://hisrinu.wordpress.com/2012/01/09/pagination-using-standardsetcontroller/
http://blog.jeffdouglas.com/2009/07/14/visualforce-page-with-pagination/

My visualforce page accepts date parameters and runs a search on custom object records and displays them in an Apex:datatable.

Here is my controller code. This works fine until I begin click the next, previous links continuously for about a minute and then it begins to slow down and freeze up.

Any idea why this is happening?

UPDATE: 7/28: This is happening only in IE. I have IE 9.

    public with sharing class FundingReportController { 

  // the soql without the order and limit
  private String soql {get;set;}

  Public Integer size{get;set;}
  Public Integer noOfRecords{get; set;} 


  //export to excel - returns a page reference to the AccountDataExcel page
    public PageReference exportToExcel() {
      return Page.fundingreportExcel;
    }

    //Instantiate the StandardSetController
    public ApexPages.StandardSetController con{get; set;}






   public List<Money_Transaction__c> moneyTransactions
    {
        get
        {
            if(con != null)
                return (List<Money_Transaction__c>)con.getRecords();
            else
                return null ;
        }
        set;
    }  


 // returns a list of wrapper objects for the sObjects in the current page set
    public List<Money_Transaction__c> getMoneyTransactions() {
    try{
        //moneyTransactions = new List<MoneyTransactionWrapper>();
        moneyTransactions = new List<Money_Transaction__c>();
        for (Money_Transaction__c mt: (List<Money_Transaction__c>)con.getRecords()) 
         {              
            moneyTransactions.add(mt); 
         }       

        }
          catch (Exception e) 
            {
               ApexPages.addMessage(new ApexPages.Message(ApexPages.Severity.ERROR, 'Code Error '+e));
            }
        return moneyTransactions ;
    }

  // the current sort direction. defaults to asc
  public String sortDir {
    get  { if (sortDir == null) {  sortDir = 'asc'; } return sortDir;  }
    set;
  }

  // the current field to sort by. defaults to last name
  public String sortField {
    get  { if (sortField == null) {sortField = 'Settlement_Date_First__c'; } return sortField;  }
    set;
  }

  // format the soql for display on the visualforce page
  public String debugSoql {
    //get { return soql + ' order by ' + sortField + ' ' + sortDir + ' limit 20'; }
    get { return soql + ' ' + sortDir; }
    set;
  }

  // init the controller and display some sample data when the page loads
  public FundingReportController() {

    moneyTransactions = new List<Money_Transaction__c>();
    //Default dates: 6 months before today
    Date fromDate = date.today();
    fromDate = fromDate.addMonths(-6);
    String fromDateStr = String.ValueOf(fromDate);
    //ApexPages.addMessage(new ApexPages.Message(ApexPages.Severity.ERROR,fromDateStr   ));
    //Default dates: Today
    Date toDate = date.today();    
    String toDateStr = String.ValueOf(toDate);




     soql = 'select ACH_Type__c, Settlement_Date_First__c, Total_ACH_Amount__c,Settlement__r.id,Settlement__r.name,Money_Movement_Type__c,Bank_Name__c,Bank_Account_Number__c,Tax_Batch__c,Payroll_Group_Detail__c from Money_Transaction__c where Settlement_Date_First__c <= '+ toDateStr + ' AND Settlement_Date_First__c >= ' + fromDateStr + ' AND ACH_Type__c != \'VHR DDP Disbursement\'';


     runQuery();
  }

  // toggles the sorting of query from asc<-->desc
  public void toggleSort() {
  //ApexPages.addMessage(new ApexPages.Message(ApexPages.Severity.ERROR, 'Inside Toggle'+soql + sortField +sortDir ));
    // simply toggle the direction
    sortDir = sortDir.equals('asc') ? 'desc' : 'asc';
    // run the query again
    runQuery();
  }

  // runs the actual query
  public void runQuery() {

    try {


          size=10;  

          ApexPages.addMessage(new ApexPages.Message(ApexPages.Severity.ERROR, 'Inside New Run query + StandardSetController '+soql + ' order by ' + sortField + ' ' + sortDir));
          con = new ApexPages.StandardSetController(Database.getQueryLocator(soql + ' order by ' + sortField + ' ' + sortDir + ' limit 100'));
          // sets the number of records in each page set
          con.setPageSize(size);
          noOfRecords = con.getResultSize();       



    } catch (Exception e) {
      ApexPages.addMessage(new ApexPages.Message(ApexPages.Severity.ERROR, 'Ooops! SOQL error '+soql ));
    }

  }

  // runs the search with parameters passed via Javascript
  public PageReference runSearch() {

    String fromDate = Apexpages.currentPage().getParameters().get('fromDate');
    String toDate = Apexpages.currentPage().getParameters().get('toDate');




    soql = 'select ACH_Type__c, Settlement_Date_First__c, Total_ACH_Amount__c,Settlement__r.id,Settlement__r.name,Money_Movement_Type__c,Bank_Name__c,Bank_Account_Number__c,Tax_Batch__c,Payroll_Group_Detail__c from Money_Transaction__c where Settlement_Date_First__c <= '+ toDate + ' AND Settlement_Date_First__c >= ' + fromDate + ' AND ACH_Type__c != \'VHR DDP Disbursement\'';
    con = new ApexPages.StandardSetController(Database.getQueryLocator(soql)); 


    // run the query again
    runQuery();

    return null;
  }


    // indicates whether there are more records after the current page set.
    public Boolean hasNext {
        get {
            return con.getHasNext();

        }
        set;
    }

    // indicates whether there are more records before the current page set.
    public Boolean hasPrevious {
        get {
            return con.getHasPrevious();
        }
        set;
    }

    // returns the page number of the current page set
    public Integer pageNumber {
        get {
            return con.getPageNumber();
        }
        set;
    }

    // returns the first page of records
    public void first() { 

        try{
        con.first();  


        }
        catch (Exception e) 
            {
               ApexPages.addMessage(new ApexPages.Message(ApexPages.Severity.ERROR, 'Code Error '+e));
            }

    }

    // returns the last page of records
    public void last() {   

        try{
        con.last();        

        }
        catch (Exception e) 
            {
               ApexPages.addMessage(new ApexPages.Message(ApexPages.Severity.ERROR, 'Code Error '+e));
            }
    }

    // returns the previous page of records
    public void previous() {   

         try{
            con.previous();      

            }
            catch (Exception e) 
            {
               ApexPages.addMessage(new ApexPages.Message(ApexPages.Severity.ERROR, 'Code Error '+e));
            }
        }

    // returns the next page of records
    public void next() {  
    try{   

        con.next();      

        }
         catch (Exception e) 
            {
               ApexPages.addMessage(new ApexPages.Message(ApexPages.Severity.ERROR, 'Code Error '+e));
            }

    }       




}

Answer 1

This project was stalled for some months. I returned to it and this time I used SOQL with the new OFFSET feature and got rid of the standardcontroller.

The actual issue was IE9 itself and I have posted the details and the solution here.
I hope it helps someone with the same re-rendering issues with IE9 and Visualforce.

Thanks.

https://salesforce.stackexchange.com/questions/7917/visualforce-major-grief-with-ie9-ajax-refresh-rerender-issues