Here is full trigger code,

In this trigger, am just trying to read value from standard Addresss fields, check some condition and based on that updating another field.
but when am tryingto read Shipping state and Country (standard Address field dropdowns), it shows null value. but saved Account record has valid values in it.

Trigger: Before insert / update

Try to throw some light on this road block 


Here is my full code of trigger:

trigger assignLocationToAccount on Account (before Insert, before Update) {

    List<String> street  = new List<String>();
    List<String> city    = new List<String>();
    List<String> state   = new List<String>();
    List<String> zipCode = new List<String>();
    List<String> country = new List<String>();
    Map<string,Id> LocMap = new Map<string,Id>();

 for (Account account : Trigger.new) {
        street.add(account.ShippingStreet);
        city.add(account.ShippingCity);
        state.add(account.ShippingState);
        zipCode.add(account.ShippingPostalCode);
        country.add(account.ShippingCountry);
     } 
     
     System.debug('--streetstreet --: ' + street );
     System.debug('--citycity --: ' + city );
     System.debug('--statestate --: ' + state );  //**it is dstandard Address drop down field**/ unable to read value from here , it just shows null
      System.debug('--zipCode --: ' + zipCode );
     System.debug('--countrycountry --: ' + country ); //**it is dstandard Address drop down field**/ unable to read value from here , it shows null
     
    //get Map of all records from Location object with above shipping details
    Map<ID,Site__c> sitemap =new Map<ID,Site__c>(
             [SELECT ID,Name,Street__c,City__c,State__c,Zip__c,Country__c  FROM Site__c 
             WHERE Street__c IN : street AND City__c IN : city AND State__c IN : state AND                                                                                                         Zip__c IN : zipCode AND  Country__c IN : country LIMIT 10000]);
                   
     for(Site__c site : sitemap.values()){
       LocMap.put(site.Street__c+site.City__c+site.State__c+site.Zip__c+site.Country__c,site.id);
     }          
 
 for (Account acc : Trigger.new) { 
     Id locId = LocMap.get(acc.ShippingStreet+acc.ShippingCity+acc.ShippingState+acc.ShippingPostalCode+acc.ShippingCountry);         
        System.debug('--LocIDd --: ' + LocId );
     If (acc.Type == 'Generator'){  
        acc.SvmxLocation__c= locId;
      }
                   
      }          
}


any help would be highly appreciated


Thakn you
Kishore