Hi All,
I was just wondering if someone could explain to me how / why the code re-enters the timer1_Tick() method when counting down.
timeLeft = 30... It checks to see if timeLeft is greater than 0, OK... timeLeft = timeLeft minus 1,,, and then displays the new timeLeft value (29), OK...... I understand up to here!
Stepping through the code, it then jumps to the closing curly bracket of the timer1_Tick() method.... but then re-enters the method to repeat the process, which I know is what we want but why / how is it doing this if its not in a loop?
I would expect it to exit the method and only re-enter after being called again!
Thanks guys!
P.S. FYI Its the last method!
Code: Select all
namespace Math_Quiz
{
public partial class Form1 : Form
{
// Create a ramdom object to genterate random numbers.
Random randomizer = new Random();
// These ints will store the numbers for
// the adition problem
int addend1;
int addend2;
// This int will keep track of the time left.
int timeLeft;
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
}
/// <summary>
/// Start the quiz by filling in all the problems
/// and starting the timer.
/// </summary>
private void startTheQuiz()
{
// Fill in the addition problems.
addend1 = randomizer.Next(51);
addend2 = randomizer.Next(51);
plusLeftLabel.Text = addend1.ToString();
plusRightLabel.Text = addend2.ToString();
sum.Value = 0;
//Start the timer
timeLeft = 30;
timeLabel.Text = "30 seconds";
timer1.Start();
}
private void startButton_Click(object sender, EventArgs e)
{
startTheQuiz();
startButton.Enabled = false;
}
private void timer1_Tick(object sender, EventArgs e)
{
if (timeLeft > 0)
{
// Display the new time left
// by updating the timeLeft label.
timeLeft = timeLeft - 1;
timeLabel.Text = timeLeft + " seconds";
}
else
{
// If the user runs out of time, stop the timer, show
// a MessageBox, and fill in the answer.
timer1.Stop();
timeLabel.Text = "Time's up!";
MessageBox.Show("You didn't finish in time.", "Sorry");
sum.Value = addend1 + addend2;
startButton.Enabled = true;
}
}
}
}
I just wrote a long reply and when I pressed send It had logged me out and I lost the message!!! 
You need to tweek that Neo so that if a user (me) presses send and has been logged out, and the user logs straight back in the message is still sent!
Im just playing about with some tutorials trying to keep it fresh in my head and continue with the learning... 