This code C# is from online source but it was in console application so I modify to work on windows form just for learning on how to use threading.timer , but it doesn't work. Can anyone help me?
I would like the code below to display message to richtextbox while the timer object is not yet destroy so the main thread shouldn't run. When timer object is destroy, the main thread will start and display the last message, "Timer example done."
Can anyone tell me why the timer doesn't execute CheckStatus() because in that method has some message to display, but I don't see the message display at all.. Thanks in advance.
------------------------------------------------------------------------------------------------- - class TimerExampleState
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{
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public int counter = 0;
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public System.Threading.Timer tmr;
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}
-
-
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public partial class Form1 : Form
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{
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private string messageString = string.Empty;
-
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public Form1()
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{
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InitializeComponent();
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}
-
-
-
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private void button1_Click(object sender, EventArgs e)
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{
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TimerExampleState s = new TimerExampleState();
-
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//create the delegate that invokes methods for the timer.
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TimerCallback timerDelegate = new TimerCallback(CheckStatus);
-
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// Create a timer that waits one second, then invokes every second.
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System.Threading.Timer timer = new System.Threading.Timer(timerDelegate, s, 1000, 1000);
-
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// Keep a handle to the timer, so it can be disposed.
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s.tmr = timer;
-
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// The main thread does nothing until the timer is disposed.
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while (s.tmr != null)
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Thread.Sleep(0);
-
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richTextBox1.AppendText("Timer example done.");
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}
-
-
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// The following method is called by the timer's delegate.
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private void CheckStatus(Object state)
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{
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TimerExampleState s = (TimerExampleState)state;
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s.counter++;
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messageString = "Checking status: "+ s.counter;
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RunMe();
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//After display message five times, wait for 10 seconds.
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if (s.counter == 5)
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{
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// Shorten the period. Wait 10 seconds to restart the timer.
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(s.tmr).Change(10000, 100);
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messageString = "changed...";
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RunMe();
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}
-
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if (s.counter == 10)
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{
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messageString = "disposing of timer...";
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s.tmr.Dispose();
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s.tmr = null;
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RunMe();
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}
-
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}
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private void RunMe()
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{
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//----trying label1
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if (label2.InvokeRequired)
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{
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this.BeginInvoke(new MethodInvoker(RunMe));
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}
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else
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{
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label2.Text = messageString;
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}
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}
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}
Aug 27 '08
11  1485  Plater 7,872
Recognized Expert Expert
No, there wouldn't be much point of it if it ran on the GUI thread. If you wanted that you could have used System.Windows. Forms.Timer
No, there wouldn't be much point of it if it ran on the GUI thread. If you wanted that you could have used System.Windows. Forms.Timer
I tried to use Windows.Forms.T imer, but after playing around with it for while, it didn't work thus I changed to system.threadin g.timer and this one has more flexibility. I will go back to use window.forms.ti mer using the same approach as I have now, to see if it can work.
thanks for your help.
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