private void btnLogIn_Click(object sender, EventArgs e)
{
DBFactoryEnums db = (DBFactoryEnums)cboDbOption.SelectedIndex + 1;
LibraryProxy library = LibraryProxy.GetInstance(db);
if (!library.Login(txtUsername.Text.Trim(), txtPassword.Text))
{
MessageBox.Show("Please Insert Username and Password");
}
if (library.account.AccountLevel >= AccountLevelEnums.Patron)
{
MessageBox.Show("Login success.");
GoToMain();
}
}