void fillModel() { string query1 = "SELECT * FROM KarisikModel"; SqlDataReader reader1; cmd = new SqlCommand(query1, con); try { con.Open(); reader1 = cmd.ExecuteReader(); ListModel.DataSource = reader1; ListModel.DataValueField = "IdMarka"; ListModel.DataTextField = "Model"; ListModel.DataBind(); } catch (Exception ex) { Response.Write("HATA: " + ex.Message); } finally { con.Close(); } }