public LecTable() { InitializeComponent(); metroGrid1.DataSource = lectures.GetAllLec(); cmbDept.DataSource = dept.all_department(); cmbDept.ValueMember = "dept_id"; cmbDept.DisplayMember = "dept_name"; cmbDept.BindingContext = BindingContext; cmblevel.DataSource = ls.all_lev(); cmblevel.DisplayMember = "lev_name"; cmblevel.ValueMember = "lev_id"; cmblevel.BindingContext = BindingContext; }