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Nikita Dhamal 4Nikita Dhamal 4 

Error: Unknown property 'String.Visible'

VVisualforcepage:
<apex:page controller="Paginationtesttrial" docType="html-5.0" sidebar="false" standardStylesheets="false">
<apex:form >
<apex:actionFunction name="landingPage" action="{!refreshPage}"/>
<html lang="en">

<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
<meta charset="utf-8"/>
<title>Metronic | Dashboard 2</title>
<link rel="stylesheet" href="//code.jquery.com/ui/1.11.4/themes/smoothness/jquery-ui.css" />
<script type="text/javascript" src="https://c.eu6.visual.force.com/resource/1456381571000/jquery_min_js"></script>

<script>
jQuery.noConflict();
function proxyHideItem(accId){
//uncomment this to hide via jquery, currently hiding via actionFunction
//jquery selector using the class, which is accountId for each row
//jQuery("."+accId).hide();
hideItem(accId);
}
</script>
<script src="//code.jquery.com/jquery-1.10.2.js"></script>
<script src="//code.jquery.com/ui/1.11.4/jquery-ui.js"></script>
<link rel="stylesheet" href="/resources/demos/style.css" />
<script type="text/javascript" src="https://c.eu6.visual.force.com/resource/1456381571000/jquery_min_js"></script>
<script>
jQuery.noConflict();
function proxyHideItem(accId){
//uncomment this to hide via jquery, currently hiding via actionFunction
//jquery selector using the class, which is accountId for each row
//jQuery("."+accId).hide();
hideItem(accId);
}
</script>
<script>
function SubmitFrm(){
alert('in SubmitFrm !!');
window.open('https://www.facebook.com/');
}
function show()
{
landingPage();
}
</script>
<apex:pageBlock title="Lead List" id="Details">
<apex:pageblockbuttons location="top">
<apex:commandbutton action="{!saveAccounts}" value="Save" id="saveButton" />
</apex:pageblockbuttons>
<apex:pageBlockTable value="{!accounts}" var="a" rowClasses="oddrow,evenrow" styleClass="fontfamily" id="Details1">
<apex:dataTable value="{!accountList}" var="a">
//notice how the styleClass is the accountId, to select using Jquery
<apex:column rendered="{!a.Visible}">
<apex:facet name="header"><b>Hide</b></apex:facet>
<apex:outputPanel onclick="proxyHideItem('{!acc.accId}');" >Hide</apex:outputPanel> &nbsp;&nbsp;
</apex:column>
<apex:column value="{!a.Date_Time_first_visit__c}" rendered="{!a.Visible}">
<apex:facet name="header">
<apex:commandLink action="{!ViewData}" value="Date / Time{!IF(sortExpression=='Date_Time_first_visit__c',IF(sortDirection='ASC','▼','▲'),'')}">
<apex:param value="Date_Time_first_visit__c" name="column" assignTo="{!sortExpression}" ></apex:param>
</apex:commandLink>
</apex:facet>
</apex:column>
<apex:column headerValue="Company" rendered="true">
<apex:outputField value="{!a.Lead__c}">
<apex:inlineEditSupport showOnEdit="saveButton" event="ondblclick"/>
<apex:commandLink action="{!ViewData}" value="{!IF(sortExpression=='Lead__c',IF(sortDirection='ASC','▼','▲'),'')}">
<apex:param value="Lead__c" name="column" assignTo="{!sortExpression}" ></apex:param>
</apex:commandLink>
</apex:outputField>
</apex:column>
</apex:pageBlockTable>
</apex:pageblock>
</body>
</html>
</apex:form>
</apex:page>

Controller:
public with sharing class  Paginationtesttrial {

    public String acc { get; set; }

    public PageReference search() {
        return null;
    }

    Public Integer noOfRecords{get; set;}
    Public Integer size{get;set;}
    Decimal totalcount =0;
    public decimal percentage{get;set;}
    public boolean test = false;
    Public List<Lead_Inspector__c> getLeads{get;set;}
    public Date startDate{get;set;}
    public Date endDate{get;set;}
    public string searchstring {get;set;}
    public List<SelectOption> countrieLst {get;set;}
    public String selectedCountry{get;set;}
    public String selectedValues {get;set;}
    private List<Lead_Inspector__c> accounts;
    private String sortDirection = 'ASC';
    private String sortExp = 'name';
    public Date datename{ get; set; }
    public String val1 {get; set;}
    public user currentuser{get;set;}
    
 Map<Id,AccountWrapper> accMap = new Map<Id,AccountWrapper>();

public List<AccountWrapper> getAccountList(){
    if (accMap == null || accMap.isEmpty()){
        for(Lead_Inspector__c acc : [Select Id, Name from Lead_Inspector__c LIMIT 25]){
       // System.debug('****************************888888888888888888888888888888888888888888'+a);
        
            accMap.put(acc.Id, new AccountWrapper(acc));
        } 
    }
    return accMap.Values();
}

//this method is invoked via the action function
public PageReference hideAccount (){

Id accToHide = (Id)ApexPages.currentPage().getParameters().get('accToHide');
System.debug('**************************** Hiding ' + accToHide);
if(accToHide != null)
accMap.get(accToHide).visible = false;

//here is where you can bolt on behaviour to store the Lead_Inspector__c  hide event
//either a field on Lead_Inspector__c  if hide is global for all users, or a dedicated
//hide object, if the hiding is user specific
return null;
}

public class AccountWrapper{

public Lead_Inspector__c  at {get; set;}

public Id aId {get { return at.Id ; }}

public String aName {get { return at.Name ;} }

public boolean visible { get; set; }

public AccountWrapper(Lead_Inspector__c  acc){

this.visible = true;
this.at = acc;

}
}
}
Atul GuptaAtul Gupta
Hi Nikita, remove this line from the vf page and try again
 
<apex:dataTable value="{!accountList}" var="a">