timer

louis Tunde

I want to add a timer rather than a countdown
which automatically starts when the form loads.
Starting time should be like 20 minutes and once it ends, i.e. on reaching 0 minutes, the form should terminate with a message displayed. And how do I display the countdown on the form? Please help me because i am working on electronic examination using window application in C#

5 Replies

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Vulpes12y ago
Accepted answer
Try this.

Note that I've created the timer programatically rather than via the VS designer.

However, you'll need to add a label to the form to show the remaining time:

public partial class Form1 : Form
{
private Timer timer;
private int mins;

public Form1()
{
InitializeComponent();
timer = new Timer();
timer.Tick += timer_Tick;
timer.Interval = 1000; // 1 second say
mins = 20; // 20 minutes say
}

DateTime startTime;

// add this manually
private void timer_Tick(object sender, EventArgs e)
{
TimeSpan ts = TimeSpan.FromMinutes(mins) + (startTime - DateTime.Now);
if (ts <= TimeSpan.Zero)
{
label1.Text = "0:00";
timer.Stop();
timer.Tick -= timer_Tick;
MessageBox.Show("Application terminating after " + mins + " minutes");
timer.Dispose();
this.Close();
}
else
{
label1.Text = ts.ToString(@"m\:ss");
}
}

private void Form1_Load(object sender, EventArgs e)
{
label1.Text = mins.ToString() + ":00";
startTime = DateTime.Now;
timer.Start();
}
}
Vulpes12y ago
Well, I assume you have a method which checks the examinee's answers against the correct ones and determines a mark or grade from that.

When the time elapses, you'll therefore need to call this method and show the result in the MessageBox rather than what you're showing at present.
louis Tunde12y ago
i mean the result of the examinee should display immediately the time allocated for the examination ends. i mean the result of the examinee should display immediately the time allocated for the examination ends.
Vulpes12y ago
Sorry, I didn't follow what you want here as a message is already being displayed as soon as the timer period elapses?
louis Tunde12y ago
sir i need your help in creating a window base test generator. I need the answer to be displaced immediately the time elapsed. Thanks