I have Form with a Timer1.
I would like to set the Tick event of that timer1 to a timer2_Tick function that is already signed to another timer2.
How can I Set the 2 timers, to 1 event?
You do it the same way you assign any other event handler, you just happen to choose the same method for both timers.
System.Windows.Forms.Timer first = new System.Windows.Forms.Timer();
first.Tick += tick;
System.Windows.Forms.Timer second = new System.Windows.Forms.Timer();
second.Tick += tick;
private void tick(object sender, EventArgs e)
{
throw new NotImplementedException();
}
If you're using the designer, instead of attaching the events through code, then you can just go to the "Properties" tab, select events, and enter the same name for the Tick event for both timers.
Just assign same function to their Tick delegate.
myTimer1.Tick += new EventHandler(TimerEventProcessor);
myTimer2.Tick += new EventHandler(TimerEventProcessor); //THE SAME LIKE FIRST ONE
private static void TimerEventProcessor(Object myObject,
EventArgs myEventArgs) {
}
Related
Is it possible to trigger Window_Loaded on the Timer.Tick event like this ?
DispatcherTimer timer = new DispatcherTimer
{
Interval = TimeSpan.FromSeconds(1)
};
timer.Tick += Window_Loaded;
timer.Start();
Or is there another way to do it ?
Your question probably confuses events and event handlers. In C#, events can only be raised from within the class they were declared in, unless they expose an internal or public method that can be called from outside. However, the Loaded event defined in FrameworkElement is not exposed that way, meaning you cannot raise it from your code.
What your code does is add your Window_Loaded event handler for the Loaded event, which is just a method. However, the sigatures of the corresponding Tick and the Loaded delegates do not match.
Tick - public delegate void EventHandler(object? sender, EventArgs e);
Loaded - public delegate void RoutedEventHandler(object sender, RoutedEventArgs e);
In order to add the window loaded event handler to the Tick event, you have to create a method or lambda that matches the Tick delegate and calls Window_Loaded with appropriate arguments, e.g.:
timer.Tick += OnTick;
private void OnTick(object sender, EventArgs e)
{
var routedEventArgs = new RoutedEventArgs();
// ...set the routed event args properties.
Window_Loaded(sender, routedEventArgs);
}
A word of caution. Although this might solve your problem it is most likely not the right approach for what you want to achieve. The Loaded event is called by the framework in the control's lifecycle.
Occurs when the element is laid out, rendered, and ready for interaction.
Whatever you are doing in your Window_loaded event handler should not be done periodically, because that does not comply with the sematics of this event. Maybe this is an XY problem.
public MainWindow()
{
InitializeComponent();
DispatcherTimer timer = new DispatcherTimer
{
Interval = TimeSpan.FromSeconds(1)
};
timer.Tick += Window_Loaded;
timer.Start();
}
private void Window_Loaded(object sender, EventArgs e)
{
}
when I start the timer ..timel is incremented normally ..but as soon as I stop the timer i.e. call the click_TimerStop function and start the timer again...the timel variable is incremented by timel+=2..and when I repeat the process ..it is increased by timel+=3..and it goes on and on ...how do I correct this ?..
DispatcherTimer clktimer = new DispatcherTimer();
private void click_TimerStart(object sender, RoutedEventArgs e)
{
clktimer.Start();
clktimer.Interval =new TimeSpan(0,0,1);
clktimer.Tick +=clktimer_tick;
}
private int timel = 0;
private void clktimer_tick(object sender, object e)
{
timel++;
timerSecond.Text = timel.ToString();
}
private void click_TimerStop(object sender, RoutedEventArgs e)
{
clktimer.Stop();
}
add
clktimer.Tick -=clktimer_tick;
before
clktimer.Tick +=clktimer_tick;
you'll unsubscribe and subscribe to event, so only one handler will be active at a time
and It's better to call start() after you set all settings to timer
It's because you're continually adding the clktimer_tick event handler each time you start the timer. Initialize your timer somewhere where it will only be called once and not every time you start, because there's no need to keep setting the same settings each time.
Is it possible to use a timer to show text in a label for like 3 sec ?
F.E. When you saved something and it was successful, you'd get a text message "success!" for 3 second and then return to the original page.
Anyone knows how to do this using a label or a messagebox ?
Yes, it s possible...
You may start the timer at where you set the text of the label to "succcess" and set it to tick after 3 seconds and then at the timer_ticks event, you may redirect to the page you want.
Edit: the code to start the timer - This is a simple windows form having one button and one label
public partial class Form1 : Form
{
//Create the timer
System.Windows.Forms.Timer myTimer = new System.Windows.Forms.Timer();
public Form1()
{
InitializeComponent();
//Set the timer tick event
myTimer.Tick += new System.EventHandler(myTimer_Tick);
}
private void button1_Click(object sender, EventArgs e)
{
//Set the timer tick interval time in milliseconds
myTimer.Interval = 1000;
//Start timer
myTimer.Start();
}
//Timer tick event handler
private void myTimer_Tick(object sender, System.EventArgs e)
{
this.label1.Text = "Successful";
//Stop the timer - if required
myTimer.Stop();
}
}
sure, that is possible. your going to want to do it with javascript/jquery on the client side to avoid a page refresh, i am thinking. here is a link to how to run javascript on a timer.
Can we show the windows form for just some specific time span, say 1 minute, then close it automatically?
Add a Timer control from Toolbox.
Set some attributes.
this.timer1.Enabled = true;
this.timer1.Interval = 60000;
this.timer1.Tick += new System.EventHandler(this.timer1_Tick);
and define Tick event handler
private void timer1_Tick(object sender, EventArgs e)
{
Close();
}
Use a Timer, let it close the form after the amount of time you need it to.
Yes. Use a System.Windows.Forms.Timer, and when the timer fires, call this.Close().
In this following function, that gets executed whenever I do
timer1.Enabled = true
private void timer1_Tick(object sender, EventArgs e)
{
//code here
}
How can I control what gets send to the (object sender, EventArgs e) ?
I want to use its parameters
The method signature is fixed, so you can't pass extra parameters to it. However, the this reference is valid within the event handler, so you can access instance members of the class (variables declared inside class but outside of any method).
1) You can use Tag property of your timer as userState
void timer1_Tick(object sender, EventArgs e)
{
Timer timer = (Timer)sender;
MyState state = timer.Tag as MyState;
int x = state.Value;
}
2) You can use field of reference type to read it in Timer's thread
void timer1_Tick(object sender, EventArgs e)
{
int x = _myState.Value;
}
3) You can use System.Threading.Timer to pass state to timer event handler
Timer timer = new Timer(Callback, state, 0, 1000);
If you want to access Timer's property in the timer1_tick method, you could do via
this.timer1 ex: this.timer1.Enabled =false;
or
Timer timer = (Timer) sender;
timer.Enabled = false;
Maybe you could make an inheritance from timer class, and there, cast the tick event (from Timer) into a tick_user event or something like this that modify de params and put into EventArgs (this is the right place to do, not in sender) other parameters you want. Also you can make a method with more or less parameters, it's up to you.
Hope this helps.