Hi every one,
I have created a custom vf page with custom controller. i want to show the validation error message at the particular fields, same as standard error messages. Below is my custom controller.
public with sharing class checkController {

  public Contact con{get;set;}
 
  public Account org {get;set;}

  public Integer i {get;set;}
 
 
  public checkController(){
 
    con = new Contact();
    intake = new Intake_Coun__c();
    org = new Account();  
  }
  private string fromCharArray(list<string> l)
  {
    string res='';
    for(string s : l)
    {
      res+=s+';';
    }
    return res;
  }

public pagereference SubmitOrg()
{
    try{
         Account acc = checkAccountExist(org.Name);
        if(acc != null)
        {
          populateAccount(acc);
          acc.Submitted_Online__c=true;
          acc.Date_Submitted__c = Date.today();
          update acc;
        }
        else
        {
          org.RecordTypeId ='XXXXXXXXX';
          insert org;
          acc = org;
        }
        con.Primary_Contact__c = true;
        con.RecordTypeId='XXXXXXXXXX';
        con.AccountId=acc.Id;
        con.npe01__Preferred_Email__c = 'work';
        con = upsertContact(acc.id);
    return initRoot();
    
     }
  catch(exception ex)
  {
    return null;
  }
}
public pagereference SubmitI()
{
  try{
    Contact c  = upsertContact(null);
    if(intake.Contact__c == null)
      intake.Contact__c =  c.id;
    intake.Submitted_Online__c = true;
    intake.Date_Submitted__c = Date.today();  
    insert intake;
    return initRoot();
  }
  catch(Exception dmle)
     {
           ApexPages.addMessages(dmle);
           return null;                                   
     }

}
private void populateContact(Contact c, Contact c2)
{
    c.FirstName = c2.FirstName ;
    c.LastName = c2.LastName ;
    c.Phone = c2.Phone ;
    c.Email = c2.Email ;
    c.leadsource = c2.leadsource ;
    c.RecordTypeId = c2.RecordTypeId;
}
private void populateAccount(Account acc)
{
  acc.Name=org.Name;
  acc.Phone=org.Phone;
  acc.Fax=org.Fax;
 
}
private Contact upsertContact(string accIdToNew)
{
  Contact c = checkContactExist(con.email);
  if (c != null){
    populateContact(c,con);
    update c;
  }
  else{
    con.AccountId = accIdToNew;
    insert con;
    c= con;
  }
  return c;
}
public Pagereference initRoot()
{
  Pagereference page = Page.Root;
  page.setredirect(true);
  return page;
     }
 
}

Can any one help ome over here.

Regards,
kiran.