public static void LoadSchool(ref DropDownList cmbSchool, int instId) { cmbSchool.DataTextField = "Name"; cmbSchool.DataValueField = "Id"; using (var helper = new DbHelper.Office()) { var schools = helper.GetSchoolForCombo(instId); if (schools.Count > 0) { schools.Insert(0, new IdAndName() { Id = 0, Name = "--Select One--" }); } cmbSchool.DataSource = schools; cmbSchool.DataBind(); } }