protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { var context = new LogicUniversityEntities(); Departments.DataSource = context.departments.Where(x => x.department_id != "STOR").Select(x => new { x.department_name, x.department_id }).ToList(); Departments.DataTextField = "department_name"; Departments.DataValueField = "department_id"; Departments.DataBind(); foreach (ListItem chkitem in Departments.Items) { chkitem.Selected = true; } ChangeROGraph(); } }