How to get the BillingstateCode from BillingState?

Question

I have a requirement like,

If user enter BillingState manually in visualforce page then BillingStateCode must have to set automatically based on the BillingState.

I am thinking to use MAP in this case, but I don't know How to get the all BillingStateCode and put as a value in MAP

MAP<String, String> mapStatetoStateCode = new Map<String, String>();

mapStatetoStateCode.put(sObject.BillingState, sObject.BillingStateCode);

Is there a way fetching all BillingStateCode from soql ?

Can anybody guide me on this situation ?

Answer 1

You can describe the field and get the state value with the statecodes:

Schema.DescribeFieldResult fieldResult = Account.BillingStateCode.getDescribe();
Map<String, String> mapCodeToValue = new Map<String, String>();

for(Schema.PicklistEntry f : fieldResult.getPicklistValues()){
mapCodeToValue.put(f.getValue(), f.getLabel());

}