private void Button_Click(object sender, RoutedEventArgs e)
{
Database Sql = new Database();
if (Sql.getUserData(BoxLogin.Text, BoxPassword.Password) == null)
{
LabelError.Visibility = Visibility.Visible;
}
else
{
string[] loggedUser = Sql.getUserData(BoxLogin.Text, BoxPassword.Password);
UserPanel w2 = new UserPanel(loggedUser);
w2.Show();
this.Close();
}
}