protected void ddlCarYear_SelectedIndexChanged(object sender, EventArgs e) { try { DataTable dt = insureCarDAL.GetComboBoxCarName(ddlCarYear.Text); CAR_YEAR = ddlCarYear.Text; ddlCarName.Items.Clear(); ddlCarModel.Items.Clear(); ddlCarName.Items.Add(new ListItem("กรุณาเลือก", "กรุณาเลือก")); ddlCarModel.Items.Add(new ListItem("กรุณาเลือก", "กรุณาเลือก")); if (dt != null) { foreach (DataRow row in dt.Rows) { ddlCarName.Items.Add(new ListItem(row[0].ToString(), row[0].ToString())); } ddlCarName.DataBind(); } } catch (Exception ex) { } }