C# TimeOut Method - c#

I have the following code but it is not executing for the TimeOut object for inactivity
private void Form1_Load(object sender, EventArgs e)
{
Console.WriteLine("booting up....");
programController.init(this);
disableFetchSetData();
label3.Hide();
logoutButton.Hide();
//Added Timer Object to log out of program
Timer MyTimer = new Timer();
MyTimer.Interval = (10 * 60 * 1000); // 10 mins
MyTimer.Tick += new EventHandler(TimeOut);
MyTimer.Start();
}
public void TimeOut(object sender, EventArgs e)
{
MessageBox.Show("The form will now close due to inactivity");
this.Close();
}
Why is this? It is supposed to execute from the Load() of the Form. Since the TimeOut method is an event, it is called upon the Load of the Form.

Related

cycle in C#.NET win form

I have C#.NET program and I want to check something every 2 seconds until my form is closed. This cycle doesn't enable with user for other hand when user run my C#.NET form cycle is start until form closed.
For example I want to check internet connection when my form is used. I don't like checking the connection in form.load;. I want to check connection is every time.
this code is worked :
cycle Timer in winForm c#.NET
using Timer = System.Windows.Forms.Timer;
private void Form1_Load(object sender, EventArgs e)
{
Timer MyTimer = new Timer();
MyTimer.Interval = (45 * 60 * 1000); // 45 mins
MyTimer.Tick += new EventHandler(MyTimer_Tick);
MyTimer.Start();
}
private void MyTimer_Tick(object sender, EventArgs e)
{
//Check for internet connection or some other work here
Timer MyTimer = new Timer();
MyTimer.Interval = (45 * 60 * 1000); // 45 mins
MyTimer.Tick += new EventHandler(MyTimer_Tick);
MyTimer.Start();
}

c# stop button for beep sound

I created a simple C# app that uses the beep console. I want to add a stop button to stop the beeping, but once the app starts to run it doesnt let me hit a close/button button. Below is the code i have.
private void button1_Click(object sender, EventArgs e)
{
int int1, int2, hours;
int1 = int.Parse(txtbox1.Text);
int2 = int.Parse(txtbox2.Text);
hours = ((60 / int1) * int2);
for (int i = 0; i <= hours; i++)
{
Console.Beep();
Thread.Sleep(int1 * 60000);
}
}
The reason is that you execute button1_Click in the GUI thread. When you call this method the thread will be stuck there for quite some time because you make it sleep.
If you remove Thread.Sleep(int1*60000); you will notice that your application is unresponsive until it is done beeping.
You should try to use a Timer instead. Something like this should work (this is based on the Windows.Forms.Timer):
private Timer timer = new Timer();
And set it up
timer.Tick += OnTick;
timer.Interval = int1 * 60000;
...
private void OnTick(object o, EventArgs e)
{
Console.Beep();
}
In your buttonclick you are now able to start and stop the timer:
timer.Start();
or
timer.Stop();
I would use a timer in this case, the reason why you can't close the form is because you are calling a sleep on the form thread from what I understand. Calling a sleep on the form thread will give the impression the app has crashed.
Here is a quick sample code I built in c#, it will beep the console at the time given. I hope it helps.
private void button1_Click(object sender, EventArgs e)
{
timer1.Tick += new EventHandler(timer_dosomething);
timer1.Interval = 60000;
timer1.Enabled = true;
timer1.Start();
}
private void button2_Click(object sender, EventArgs e)
{
timer1.Stop();
}
void timer_dosomething(object sender, EventArgs e)
{
Console.Beep();
}

C# how to show message after specific time period

In my project I would like to show message or call methods after 5 minutes for example, If the users didn't click on specific button, I wrote this code
Boolean flage = false;
private void button1_Click(object sender, EventArgs e)
{
Timer Clock;
Clock = new System.Windows.Forms.Timer();
Clock.Interval = 1000;
Clock.Start();
Clock.Tick += new EventHandler(Timer_Tick);
}
public void Timer_Tick(object sender, EventArgs eArgs)
{
if (flage == false)
{
MessageBox.Show("after period of time ");
}
}
private void button2_Click(object sender, EventArgs e)
{
flage = true;
}
Its keeping show the messageBox can any body help me.
Your Timer Clock variable is on the stack and ceases to exist when the function exits.
Try making it a member of the class.

how to use timer effectively in c#

I have to show one form for about 5 sec and then I have to close that form and then show some other form once the new form is shown the timer has to stop.
I have difficulty in doing this.
private void radioButton1_CheckedChanged(object sender, EventArgs e)
{
Form5 f5 = new Form5();
f5.Show();
f5.label7.Text = label6.Text;
MyTimer.Interval = 5000; // 0.5 mins
MyTimer.Tick += new EventHandler(MyTimer_Tick);
MyTimer.Start();
}
private void MyTimer_Tick(object sender, EventArgs e)
{
MessageBox.Show("All The Best for Your Test and Your Time Starts Now.");
Form6 f6 = new Form6();
f6.Show();
MyTimer.Enabled = false;
Form5 f5 = new Form5();
f5.Hide();
}
try this code
Form5 f5 = new Form5();
private void radioButton1_CheckedChanged(object sender, EventArgs e)
{
f5.Show();
f5.label7.Text = label6.Text;
MyTimer.Interval = 5000; // 0.5 mins
MyTimer.Tick += new EventHandler(MyTimer_Tick);
MyTimer.Start();
}
private void MyTimer_Tick(object sender, EventArgs e)
{
MessageBox.Show("All The Best for Your Test and Your Time Starts Now.");
Form6 f6 = new Form6();
f6.Show();
MyTimer.Enabled = false;
MyTimer.stop();
f5.Hide();
}
Pull the declaration of Form5 outside of the functions, so it is a field. As it stands, each function has a different instance of this class.
Form5 f5 = new Form5();
private void radioButton1_CheckedChanged(object sender, EventArgs e)
{
f5.Show();
f5.label7.Text = label6.Text;
MyTimer.Interval = 5000; // 0.5 mins
MyTimer.Tick += new EventHandler(MyTimer_Tick);
MyTimer.Start();
}
private void MyTimer_Tick(object sender, EventArgs e)
{
MessageBox.Show("All The Best for Your Test and Your Time Starts Now.");
Form6 f6 = new Form6();
f6.Show();
MyTimer.Enabled = false;
MyTimer.Stop();
f5.Hide();
}
Note: You really should rename your form classes and the variables - f6 is meaningless. Call it what it is.
try this
Form5 f5 = new Form5(); //declare form obj globally
private void radioButton1_CheckedChanged(object sender, EventArgs e)
{
f5.Show();
f5.label7.Text = label6.Text;
MyTimer.Interval = 5000; // 0.5 mins
MyTimer.Tick += new EventHandler(MyTimer_Tick);
MyTimer.Start();
}
private void MyTimer_Tick(object sender, EventArgs e)
{
MessageBox.Show("All The Best for Your Test and Your Time Starts Now.");
Form6 f6 = new Form6();
f6.Show();
MyTimer.Enabled = false;
f5.Hide();
}
I see several potential problems. First, you should setup your timer only once, perhaps at Form construction time, you don't need to set the interval and wire up an even handler every single time radioButton1's check state changes.
Inside of MyTimer_Tick, the first line should be calling MyTimer.Stop() (just call stop, you don't need to mess with Enabled, they do the same thing).
THEN you can display the MessageBox (which is modal and blocking), show Form6, hide f5, etc.
Think of MessageBox.Show() as a really long running call. It doesn't return until the message box is dismissed (it can easily take more than 5 seconds or any arbitrary amount of time). While the MessageBox is up, timer tick events are still queuing up (because the line that stops the timer hasn't been executed yet). It would be worth looking up the documentation for MessageBox.Show() and reading about what a modal dialog is and how its different from the alternative.
And try and clean up the names as other's have pointed out.
I think You're making it to difficult. If I understood You correctly...
Just add a timer to form5, set it's properties Enabled = true; and Interavl = 1000; (1000 miliseconds or 1 second). and just add timer tick event handler to your form5 timer like
private int _start = 0;
private int _seconds = 5;
private void timer1_Tick(object sender, EventArgs e)
{
_start++;
if(_start >= _seconds)
{
Close();
}
}
_start and _seconds should be initialized like form class private fields, or properties before event handler. This code works fine for me, and it closes form5 after 5 seconds it was shown. If you want to make this more flexible, for example if you want to set how many seconds form5 should be shown U can, for example, reload form5 constructor like ...
public Form5(int seconds)
{
InitializeComponent();
_seconds = seconds;
}
and in form1, when you create form5 pass number of seconds U want to show form5 as parameter:
Form5 f5 = new Form5(5);
also I think it would be better to create new instance of form 5 dirrectly in event handler
private void radioButton1_CheckedChanged(object sender, EventArgs e)
{
new Form5(10).Show(); // show form5 for 10 seconds
...
}
If U want to show some another more form after form5 close, just show it before form5 close in timer tick event handler:
private void timer1_Tick(object sender, EventArgs e)
{
_start++;
if(_start >= _seconds)
{
new Form2().Show();
Close();
}
}

Changing label text property periodically

I have a label. I need to change the text property every 3 seconds. Please let me know how to do this. I tried using timer, but my application is going into infinite loop. I do not want this to happen/ Any help will be appreciated!
timer1.Interval = 5000;
timer1.Enabled = true;
timer1.Tick += new System.EventHandler (OnTimerEvent);
private void OnTimedEvent(object source, ElapsedEventArgs e)
{
refreshStatusBar();
}
In your class constructor, you need to initialize the initial text for the Label and the .NET Framework's Timer component.
timer.Tick += new EventHandler(timer_Tick);
timer.Interval = (1000) * (3); // Timer will tick every 3 seconds
timer.Enabled = true;
timer.Start();
label.Text = DateTime.Now.ToString(); // initial label text.
Then in the timer's tick handler, update the Label's text property.
private void timer_Tick(object sender, ElapsedEventArgs e)
{
label.Text = DateTime.Now.ToString(); // update text ...
}
You should use thread, and when you want to stop call yourthread.Abort();
Update: SynchronizationContext method:
System.Threading.SynchronizationContext sync;
private void Form1_Load(object sender, System.EventArgs e)
{
sync = SynchronizationContext.Current;
System.Windows.Forms.Timer tm = new System.Windows.Forms.Timer { Interval = 1000 };
tm.Tick += tm_Tick;
tm.Start();
}
//Handles tm.Tick
private void tm_Tick(object sender, System.EventArgs e)
{
sync.Post(dopost, DateAndTime.Now.ToString());
}
public void dopost(string txt)
{
Label1.Text = txt;
}

Categories