public static string[] GetCustomers(string prefix) { List <string> customers = new List <string>(); BusinessLayer.DataServices m = new BusinessLayer.DataServices(); DataTable dt = m.GetResearchAcademicAssociatedInfo1(prefix); foreach (DataRow dr in dt.Rows) { customers.Add(string.Format("{0}", dr["Sug_Word"])); } return(customers.ToArray()); }