C#

Eddy Vluggen wrote:

I have run many pieces of homework on this machine, but never did anything happen that caused damage.

#pragma warning disable 1060

SuppressUnmanagedCodeSecurityAttribute

Gerry Schmitz wrote:

(Some people are color blind).

const int Up = 1;
const int Down = -1;
void WijzigVerdieping(int direction = Up)
 {
     etage += direction;
     lblHuidigeVerdieping.Content = etage.ToString();
 }

 private void btnUp_Click(object sender, RoutedEventArgs e)
 {

     WijzigVerdieping(); // Or WijzigVerdieping(Up);
  }

 private void btnDown_Click(object sender, RoutedEventArgs e)
 {
     WijzigVerdiep(Down);
 }

const sbyte Up = 1;
const sbyte Down = -1;

void WijzigVerdieping(sbyte direction = Up)
{
    etage += direction;
    lblHuidigeVerdieping.Content = etage.ToString();
}

 sbyte up = +1;
 sbyte down = -1;

void WijzigVerdiep(sbyte direction )
{
    etage += direction;
    lblHuidigeVerdieping.Content = etage.ToString();

}

const sbyte up = +1;
const sbyte down = -1;

private void btnUpDown_Click(object sender, RoutedEventArgs e)
{
    Button btn = (Button)sender;
    switch (btn.Name)
    {
        case "btnUp" : etage++; break;
        case "btnDown" : etage--; break;
    }
    lblHuidigeVerdieping.Content = etage.ToString();
}

void WijzigVerdieping(bool omhoog) {
     if (omhoog) etage++; else etage--;
     lblHuidigeVerdieping.Content = etage.ToString();
 }

 private void btnUp_Click(object sender, RoutedEventArgs e) {
     WijzigVerdieping(true);
 }

 private void btnDown_Click(object sender, RoutedEventArgs e) {
     WijzigVerdieping(false);
 }

// note: I have not tested this code ... I don't use WPF; but, I am confident this is valid. 

namespace Whatever
{
    public enum Verdieping
    {
        kelder = -1,  // you could omit this
        gelijksvloers,
        een,
        twee,
        drie
    }

    public partial class MainWindow : Window
    { 
        private int tally;

        public MainWindow()
        {
            InitializeComponent();

            lblHuidigeVerdieping.Text = Verdieping.gelijksvloers.ToString()};

            tally = 0;
        }

        private void TallyButtons_Click(object sender, RoutedEventArgs  e)
        {
            if (sender.Equals(btnDown))
            {
                if (tally == (int)Verdieping.gelijksvloers)
                {
                    // throw an error ?
                    // show a dialog ?
    
                    return;
                }
    
                tally--;
            }
            else
            {
                if (tally == (int) Verdieping.drie)
                {
                    // throw an error ?
                    // show a dialog ?
    
                    return;
                }
    
                tally++;
            }

            lblHuidigeVerdieping.Text = tally.ToString();
        }
    }
}