Visualforce Page with Custom Controller and Pagination > Apex and Visualforce

Visualforce Page with Custom Controller and Pagination > Apex and Visualforce

Salesforce Development and Implementations

As I go on learning about development on and using the Salesforce Platform, I have decided to share my practice sessions / codes, hoping it could help someone in the future.

Here is the code for a Visualforce Page with a Custom Apex Controller, that displays Account and User Standard Objects information and also has Pagination implemented on the Account Object.


Code:



AccountUserView.vfp

<apex:page controller="AccountUserController" sidebar="false" showHeader="false" lightningStylesheets="true">
 <apex:form >
 <apex:pageBlock title="List of Accounts and Users from Custom Controller with Pagination on Accounts Object">
 <apex:pageBlockSection title="Your Info ..">
 <br />
 <h1>
 Current User : {! $User.FirstName } {! $User.LastName } 
 ( {! $User.Username } )
 </h1>
 <br />
 <p> Today's Date is {! TODAY() } </p>
 <p> So Next week it will be {! TODAY() + 7 } </p>
 <p>{! IF( CONTAINS('salesforce.com','force.com'), 
 'Yep', 'Nope') }</p>
 <p>{! IF( DAY(TODAY()) < 15, 
 'Before the 15th', 'The 15th or after') }</p>
 <br /><br />
 </apex:pageBlockSection>
 
 <apex:pageBlockButtons >
 <apex:commandButton value="<<" action="{!beginning}" disabled="{!DisablePrevious}"/>
 <apex:commandButton value="<" action="{!previous}" disabled="{!DisablePrevious}"/>
 
 
 <apex:commandButton value=">" action="{!next}" disabled="{!DisableNext}"/>
 <apex:commandButton value=">>" action="{!last}" disabled="{!DisableNext}"/>
 
 <apex:commandButton action="{!updateUsrs}" value="Users" title="Users"/>
 
 </apex:pageBlockButtons>
 <apex:pageBlockSection title="Accounts and Users" columns="2">
 <apex:pageBlockTable title="Account Info" value="{!Accs}" var="a">
 <apex:column value="{!a.Name}"/>
 </apex:pageBlockTable>
 <apex:pageBlockTable title="User Info" value="{!Usrs}" var="u">
 <apex:column value="{!u.Name}"/>
 <apex:column value="{!u.Email}"/>
 <apex:column value="{!u.UserType}"/>
 </apex:pageBlockTable>
 </apex:pageBlockSection>
 </apex:pageBlock>
 </apex:form>
</apex:page>

AccountUserController.apxc



public class AccountUserController {
    private List<Account> accs = new List<Account>();
    private List<User> usrs;
   
    //limited display list
    public List<Account> accstoshow{get;set;}
   
    //Navigation Variables
    Integer counter = 0;    // To track number of records parsed
    Integer limitSize = 20; // Number of records to be displayed
    Integer totalSize = 0;  // To store the total number of records available
   
    public AccountUserController(){
        accstoshow = new List<Account>();
        accs = [select ID, Name from Account ORDER BY Name LIMIT 999];
        totalSize = accs.size();
       
        if((counter+limitSize) <= totalSize){
            for(Integer i = 0; i<limitSize; i++)
                accstoshow.add(accs.get(i));
        }
        else{
            for(Integer i=0;i<totalSize;i++)
                accstoshow.add(accs.get(i));
           
        }
    }
   
    //Navigation methods
   
    public void beginning(){
       
        accstoshow.clear();
        counter=0;
        if((counter + limitSize) <= totalSize){
           
            for(Integer i=0;i<limitSize;i++){
                accstoshow.add(accs.get(i));
            }  
           
        } else{
            
            for(Integer i=0;i<totalSize;i++){
                accstoshow.add(accs.get(i));

          }      

          
        }
       
    }
   
    public void next(){
       
        accstoshow.clear();
        counter=counter+limitSize;
        
        if((counter+limitSize) <= totalSize){
            for(Integer i=counter-1;i<(counter+limitSize);i++){
                accstoshow.add(accs.get(i));
            }
        } else{
            for(Integer i=counter;i<totalSize;i++){

               accstoshow.add(accs.get(i));
            }
        }
    }
   
    public void previous(){
       
        accstoshow.clear();

      
        counter=counter-limitSize;      
       
        for(Integer i=counter;i<(counter+limitSize); i++){
            accstoshow.add(accs.get(i));
        }
    }
   
    public void last (){
       
        accstoshow.clear();
 
       if(math.mod(totalSize , limitSize) == 0){
           counter = limitSize * ((totalSize/limitSize)-1);
        } else if (math.mod(totalSize , limitSize) != 0){
            counter = limitSize * ((totalSize/limitSize));
        }
       

       for(Integer i=counter-1;i<totalSize-1;i++){
            accstoshow.add(accs.get(i));
        }
       
    }
   
    public Boolean getDisableNext(){
       
        if((counter + limitSize) >= totalSize )
            return true ;
        else
            return false ;
    }
   
    public Boolean getDisablePrevious(){
       
        if(counter == 0)
            return true ;
        else
            return false ;
    }
   
    public List <Account> getAccs(){
        return accstoshow;
    }

  
    public List <User> getUsrs(){
        return usrs;
    }
   
    public pageReference updateUsrs(){
        usrs = [select Id, Username, Firstname, Lastname, Name, Email, UserType from User];
        return null;
    }
   
}