private void Button_Click(object sender, RoutedEventArgs e)
        {
            String connLine = "";
            if (Application.Current.Properties["sqlCon"] == null)
            {
                Application.Current.Properties["sqlCon"] = "SERVER=localhost; uid=root; pwd='itkmitl2014'; database=factory management; charset=utf8;";
                connLine = (String)Application.Current.Properties["sqlCon"];
            }
            else
            {
                connLine = (String)Application.Current.Properties["sqlCon"];
            }
            Boolean flag = ConnectionTester(connLine);
            if (flag == true)
            {
                //MessageBox.Show("Database connection is ok!", "สถานะ Database");
                String[] dataComing = getPass(this.username.Text, connLine);
                String pass_out = MD5Convert(this.pass.Password);
                if (pass_out.ToLower() == dataComing[0])
                {
                    loginFlag = true;
                    Application.Current.Properties["role"] = dataComing[1];
                    Application.Current.Properties["iduser"] = dataComing[2];

                    MessageBox.Show(this.username.Text);
                    Mainprogram sesy = new Mainprogram();
                    sesy.Show();
                    this.Close();
                }
                else
                {
                    MessageBox.Show("รหัสผ่านหรือ username ผิด", "Factory Manager: Failed to login");
                }
                Application.Current.Properties["userFlag"] = loginFlag;
            }
            else
            {
                if (MessageBox.Show("การเชื่อมต่อ database มีปัญหากรุณาใส่ข้อมูลการเชื่อมต่อใหม่", "สถานะ Database", MessageBoxButton.YesNo, MessageBoxImage.Warning) == MessageBoxResult.Yes)
                {
                    checkConnect sesy = new checkConnect();
                    sesy.Show();
                }
                else
                {
                    Application.Current.Shutdown();
                }
            }


        }