public void AddNewUser(string userName, string firstName, string lastName, string accountType, string cript_password, string byWho, out string resCode, out string resDesc)
 {
     try
     {
         Log.AppendText("กำลังส่งข้อมูลเพิ่มรายชื่อผู้ใช้ระบบใหม่ {" + userName + ", " + firstName + ", " + lastName + ", " + accountType + "} by " + byWho);
         ManageBiz ms = new ManageBiz();
         DataTable dtUser;
         dtUser = ms.GetUserBy(userName);
         if (dtUser.Rows.Count == 0)
         {
             Log.AppendText("ตรวจสอบ ชื่อผู้ใช้ เรียบร้อย");
             ms.AddNewUser(userName, firstName, lastName, accountType, cript_password);
             resCode = "00";
             resDesc = "";
         }
         else
         {
             Log.AppendText("WARNING! : ชื่อผู้ใช้ซ้ำ");
             resCode = "01";
             resDesc = "ชื่อผู้ใช้ซ้ำ!";
         }
     }
     catch (Exception ex)
     {
         resCode = "EX";
         resDesc = ex.Message;
         Log.AppendText(ex.Message);
     }
 }
        public bool Login(string UserName, string Password)
        {
            try
            {
                ManageBiz ms = new ManageBiz();

                string    crptPassword = StringCipher.Encrypt(Password, true);
                DataTable dtUser;
                dtUser = ms.GetUserBy(UserName);
                bool ShowDenineMessage = false;
                if (dtUser != null)
                {
                    if (dtUser.Rows.Count == 1)
                    {
                        string dbPassword = dtUser.Rows[0]["Password"].ToString();
                        if (dbPassword == crptPassword)
                        {
                            return(true);
                        }
                        else
                        {
                            ShowDenineMessage = true;
                        }
                    }
                    else
                    {
                        ShowDenineMessage = true;
                    }
                }
                else
                {
                    ShowDenineMessage = true;
                }
                if (ShowDenineMessage)
                {
                    MessageBox.Show("Access denine. Invalid user name or password.",
                                    "Login",
                                    MessageBoxButtons.OK,
                                    MessageBoxIcon.Asterisk,
                                    MessageBoxDefaultButton.Button1);
                }
                return(false);
            }
            catch (Exception ex)
            {
                Log.AppendText(ex.Message);
                MessageBox.Show("Login Error : " + ex.Message);
                return(false);
            }
        }