alert หลังจาก update เสร็จแล้วค่ะ แต่ alert ไม่ขึ้นเมื่อ updateข้อมูลเสร็จแล้วค่ะ asp.net c#

Response.Write("<script type=\"text/javascript\">alert('updateแล้วค่ะ');</script>"); 
ไม่ยอม alert ขึ้นมาค่ะ       
                    string sqlProduct3 = "";
                    sqlProduct3 += "UPDATE tbDCusCardS";
                    sqlProduct3 += " SET [Status] = '" + Drop1 + "' ";
                    sqlProduct3 += ",[Grounding] = '" + T1 + "' ";
                    // sqlProduct3 += ",[ControlStatus] = '" + RadioButtonList1.Text + "' ";
                    // sqlProduct3 += " WHERE CardSNo='" + LNo00101.Text + "'AND DocuMentNo='" + DocNO + "' ";

                    sqlProduct3 += " WHERE CardFID='" + ID + "' ";


                    SqlCommand cmd = new SqlCommand();
                    SqlDataAdapter da3 = new SqlDataAdapter(sqlProduct3, Conn3);
                    objCmd = new System.Data.SqlClient.SqlCommand();
                    objCmd.Connection = Conn3;
                    objCmd.CommandType = CommandType.Text;
                    objCmd.CommandText = sqlProduct3;

                    objCmd.ExecuteNonQuery();
                
                Response.Write("<script type=\"text/javascript\">alert('updateแล้วค่ะ');</script>"); 
            }