private void close_btn_Click(object sender, EventArgs e)
        {
            Admin_home admin = new Admin_home();

            admin.Show();
            this.Close();
        }
        private void loginButtonClicked(object sender, EventArgs e)
        {
            try
            {
                String username = tfUsername.Text.Trim();
                String password = Secret.MD5Hash(tfPassword.Text.Trim());

                SQLiteConnection conn = new SQLiteConnection(DbConfig.CONNECTION_STRING);
                conn.Open();
                string query = "select usertype from users where username='******'and password='******'";

                SQLiteCommand    cmd    = new SQLiteCommand(query, conn);
                SQLiteDataReader reader = cmd.ExecuteReader();
                if (reader.Read())
                {
                    String userType = reader.GetString(0);
                    Console.WriteLine(userType);
                    conn.Close();

                    userdetail userdetail = new userdetail();
                    userdetail.setUname(username);

                    if (userType.Equals("member"))
                    {
                        Home home = new Home();
                        home.Show();
                        this.Hide();
                    }
                    else if (userType.Equals("manager"))
                    {
                        Manager_home manager = new Manager_home();
                        manager.Show();
                        this.Hide();
                    }
                    else if (userType.Equals("admin"))
                    {
                        Admin_home admin = new Admin_home();
                        admin.Show();
                        this.Hide();
                    }
                }
            }
            catch (Exception x)
            {
                MessageBox.Show(x.ToString());
            }
        }