How to Load the List values salesforce Apex class from to in my aspx web page dropdown list?

Hi there,

I m using salesforce web service inside my webapplication, Here I m using one dropdown list..there i need load return value from Sales Force Apex class..... How do i follow?
My Apex Coding
global class getTeacherName{ WebService static List<Contact> getTeacherName() { List<Contact> contactList = [SELECT FirstName,Password__c FROM Contact WHERE ContactType__c='teacher']; List<Contact> l1 = new List<Contact>(); if(contactList.size()>0){ for(Contact c : contactList){ Contact l=new Contact(FirstName =c.FirstName); l1.add(l); } } return l1; } }


my Aspx Page code

getTeacherName.getTeacherNameService getTeacherInfoObj = new getTeacherName.getTeacherNameService(); getTeacherInf ...