private void buttonLogout_Submit_Click_1(object sender, EventArgs e)
{
DB db = new DB();
String username = textUsername.Text;
String password = textPassword.Text;
DataTable table = new DataTable();
MySqlDataAdapter adapter = new MySqlDataAdapter();
//Validation of the login input
MySqlCommand command = new MySqlCommand("SELECT * FROM `user_data` WHERE `username` = @usn and `password` = @pass", db.getConnect());
command.Parameters.Add("@usn", MySqlDbType.VarChar).Value = username;
command.Parameters.Add("@pass", MySqlDbType.VarChar).Value = password;
adapter.SelectCommand = command;
adapter.Fill(table);
if (table.Rows.Count > 0)
{
MySqlCommand command2 = new MySqlCommand("SELECT * FROM `login_current` WHERE `username` = @username", db.getConnect());
command2.Parameters.Add("@username", MySqlDbType.VarChar).Value = username;
command2.CommandType = CommandType.Text;
command2.Connection = Connect;
Connect.Open();
try
{
MySqlDataReader dr;
dr = command2.ExecuteReader();
while (dr.Read())
{
if ((string)dr["username"] == textUsername.Text)
{
id = (int)dr["id"];
student_no = (string)dr["student_no"];
name = (string)dr["name"];
course = (string)dr["course"];
address = (string)dr["address"];
phone_no = (int)dr["phone_no"];
break;
}
}
dr.Close();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
Connect.Close();
MySqlCommand UpdateRecord = new MySqlCommand("UPDATE `records` SET `Logout_time`= CURRENT_TIMESTAMP WHERE `username` = '" + textUsername.Text + "' ORDER BY `Login_time` DESC LIMIT 1", db.getConnect());
try
{
db.openConnection();
if (UpdateRecord.ExecuteNonQuery() == 1)
{
MySqlCommand DeleteLogin_current = new MySqlCommand("DELETE FROM `login_current` WHERE `login_current`.`id` = " + id + "", db.getConnect());
try
{
db.openConnection();
if (DeleteLogin_current.ExecuteNonQuery() == 1)
{
MessageBox.Show("Logout Successful");
this.Hide();
Home Home = new Home();
Home.ShowDialog();
this.Close();
}
else
{
MessageBox.Show("Logout Failed");
}
db.closeConnection();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
else
{
MessageBox.Show("Logout Failed");
}
db.closeConnection();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
else
{
MessageBox.Show("Please check your username or password", "Invalid Input");
}
}
