I have one button name called Submit. I would like to trigger Auto Button_Click event for every 5sec.
E.g:
private void Button_Click(object sender, RoutedEventArgs e)
{
MessageBox.Show("Welcome to WPF....");
}
Every 5sec I need to call this Button_Click event to show Message like "Welcome to Google...." automatically.
Please help me to solve.
In Wpf, you could use DispatcherTimer
public MainWindow()
{
InitializeComponent();
Loaded += MainWindow_Loaded;
}
private void MainWindow_Loaded(object sender, RoutedEventArgs e)
{
//Timer
DispatcherTimer timer = new DispatcherTimer();
timer.Tick += (s, ev) => btnClickMe.RaiseEvent(new RoutedEventArgs(Button.ClickEvent));
timer.Interval = new TimeSpan(0, 5, 0);
timer.Start();
}
create a timer to run every 5 seconds and send: Button_Click(null, null);
public static void Main()
{
var timer = new Timer();
timer.Elapsed+= OnTimedEvent;
timer.Interval=5000;
timer.Enabled=true;
Console.ReadKey();
}
private static void OnTimedEvent(object source, ElapsedEventArgs e)
{
Button_Click(null, null);
}
It is as simple as this. Create a timer of 5 seconds duration and do this on the timer_tick event.
buttonName.RaiseEvent(new RoutedEventArgs(ButtonBase.ClickEvent));
Related
I used this link in order to solve my problem, but with a partial success
Change button color for a short time
I need to Present a red button.
Whenever the button is clicked, it changes its color to green for a period of 5 second,
Consecutive clicks should be supported but should not accumulate i.e. the button color should turn back to red 5 second after the last click.
my code:
private void myButton_Click(object sender, RoutedEventArgs e)
{
Timer timer = new Timer { Interval = 5000 };
timer.Elapsed += HandleTimerTick;
myButton.Background = new SolidColorBrush(Colors.LightGreen);
timer.Start();
}
private void HandleTimerTick(object sender, EventArgs e)
{
Timer timer = (Timer)sender;
timer.Stop();
myButton.Dispatcher.BeginInvoke((Action)delegate()
{
myButton.Background = new SolidColorBrush(Colors.Red);
});
}
it works but just 5 seconds from my first click and the timer not resets every time I've click the button.
Thanks for your help.
You have to move the timer out of the event and restart it every time the user clicks. Something along these lines:
public partial class MainWindow : Window
{
private Timer timer;
public MainWindow()
{
InitializeComponent();
timer = new Timer{Interval = 5000};
}
private void Button_Click(object sender, RoutedEventArgs e)
{
timer.Elapsed += HandleTimerTick;
myButton.Background = new SolidColorBrush(Colors.LightGreen);
timer.Stop();
timer.Start();
}
private void HandleTimerTick(object sender, EventArgs e)
{
Timer timer = (Timer)sender;
timer.Stop();
myButton.Dispatcher.BeginInvoke((Action)delegate()
{
myButton.Background = new SolidColorBrush(Colors.Red);
});
}
}
How can I change the text of button with timeout? I tried out with the following code but it is not working.
private void button1_Click(object sender, EventArgs e)
{
Stopwatch sw = new Stopwatch();
sw.Start();
if (button1.Text == "Start")
{
//do something
button1.Text = "stop"
if (sw.ElapsedMilliseconds > 5000)
{
button1.Text = "Start";
}
}
How can I correct my code?
You need to use Timer instead:
Timer t = new Timer(5000); // Set up the timer to trigger on 5 seconds
t.SynchronizingObject = this; // Set the timer event to run on the same thread as the current class, i.e. the UI
t.AutoReset = false; // Only execute the event once
t.Elapsed += new ElapsedEventHandler(t_Elapsed); // Add an event handler to the timer
t.Enabled = true; // Starts the timer
// Once 5 seconds has elapsed, your method will be called
void t_Elapsed(object sender, ElapsedEventArgs e)
{
// The Timer class automatically runs this on the UI thread
button1.Text = "Start";
}
Stopwatch is only for measuring how much time has passed since you called Start().
If you're using C# 5
private async void button1_Click(object sender, EventArgs e)
{
button1.Text = "Stop";
await Task.Delay(5000);
button1.Text = "Start";
}
You could use a timer. In this example the text of the button changes to "Stop" after 5 seconds.
private Timer timer = new Timer();
private void button1_Click(object sender, EventArgs e)
{
timer.Interval = 5000; // interval length
timer.Tick += TimerOnTick;
timer.Enabled = true; // activate timer
button1.Text = "Start";
}
private void TimerOnTick(object sender, EventArgs eventArgs)
{
timer.Enabled = false; // deactivate timer
button1.Text = "Stop";
}
I think you can reach your goal by using Timer
Example of using Timer
public partial class FormWithTimer : Form
{
Timer timer = new Timer();
public FormWithTimer()
{
InitializeComponent();
// Everytime timer ticks, timer_Tick will be called
timer.Tick += new EventHandler(timer_Tick);
timer.Interval = (1000) * (1); // Timer will tick every second
timer.Enabled = true; // Enable the timer
}
// .......
showForm() // declaration
{
timer.start();
// .......
timer.stop();
}
void timer_Tick(object sender, EventArgs e)
{
//hide form...through visibility
}
}
Use this instead of Stopwatch:
private void button1_Click(object sender, EventArgs e)
{
button1.Text = "stop"
aTimer = new System.Timers.Timer(5000);
aTimer.Elapsed += new ElapsedEventHandler(OnTimedEvent);
aTimer.Enabled = true;
}
// Specify what you want to happen when the Elapsed event is raised.
private static void OnTimedEvent(object source, ElapsedEventArgs e)
{
button1.Text = "Start";
var atim = source as Timer;
if (atim != null)
atim.Elapsed -= OnTimedEvent;
}
I am writing a WPF application.
I want to trigger an event once the mouse stops moving.
This is how I tried to do it. I created a timer which counts down to 5 seconds. This timer is "reset" every time the mouse moves.
This idea is that the moment the mouse stops moving, the timer stops being reset, and counts down from 5 to zero, and then calls the tick event handler, which displays a message box.
Well, it doesn't work as expected, and it floods me with alert messages. What am I doing wrong?
DispatcherTimer timer;
private void Window_MouseMove(object sender, MouseEventArgs e)
{
timer = new DispatcherTimer();
timer.Interval = new TimeSpan(0, 0, 5);
timer.Tick += new EventHandler(timer_Tick);
timer.Start();
}
void timer_Tick(object sender, EventArgs e)
{
MessageBox.Show("Mouse stopped moving");
}
It is not necessary to create a new timer on every MouseMove event. Just stop and restart it. And also make sure that it is stopped in the Tick handler, since it should be fired only once.
private DispatcherTimer timer;
public MainWindow()
{
InitializeComponent();
timer = new DispatcherTimer { Interval = TimeSpan.FromSeconds(5) };
timer.Tick += timer_Tick;
}
void timer_Tick(object sender, EventArgs e)
{
timer.Stop();
MessageBox.Show("Mouse stopped moving");
}
private void Window_MouseMove(object sender, MouseEventArgs e)
{
timer.Stop();
timer.Start();
}
You need to unhook the event before hooking it again like this -
private void poc_MouseMove(object sender, MouseEventArgs e)
{
if (timer != null)
{
timer.Tick-= timer_Tick;
}
timer = new DispatcherTimer();
timer.Interval = new TimeSpan(0, 0, 5);
timer.Tick += new EventHandler(timer_Tick);
timer.Start();
}
Explanation
What you doing is whenever a mouse moves, you create a new instance of DispatcherTimer and hook Tick event to it without unhooking the event for previous instance. Hence, you see flooded messages once timer stops for all the instances.
Also, you should unhook it otherwise previous instance won't be garbage collected since they are still strongly referenced.
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;
}
Hi I am working with Windows.Forms.Timer with Web Application . I create Timer.Tick event handler to handle Timer_Tick but I am not successfull. I don't get any error but I can not get result even. Here is my code
System.Windows.Forms.Timer StopWatchTimer = new System.Windows.Forms.Timer();
Stopwatch sw = new Stopwatch();
public void StopwatchStartBtn_Click(object sender, ImageClickEventArgs e)
{
StopWatchTimer.Enabled = true;
StopWatchTimer.Interval = 1;
StopWatchTimer.Start();
this.StopWatchTimer.Tick += new EventHandler(StopWatchTimer1_Tick);
sw.Start();
}
protected void StopWatchStopBtn_Click(object sender, ImageClickEventArgs e)
{
StopWatchTimer.Stop();
sw.Reset();
StopWatchLbl.Text = "00:00:00:000";
}
public void StopWatchTimer1_Tick(object sender,EventArgs e)
{
TimeSpan elapsed = sw.Elapsed;
StopWatchLbl.Text = string.Format("{0:00}:{1:00}:{2:00}:{3:00}",
Math.Floor(elapsed.TotalHours),
elapsed.Minutes,
elapsed.Seconds,
elapsed.Milliseconds);
}
From the MSDN documentation for Windows Forms Timer (emphasis mine):
Implements a timer that raises an event at user-defined intervals. This timer is optimized for use in Windows Forms applications and must be used in a window.
This timer will not work in a web application. You'll need to use another class, like System.Timers.Timer. This has it's own pitfalls, however.
Did you try defining the Tick event prior to starting the timer?
this.StopWatchTimer.Tick += new EventHandler(StopWatchTimer1_Tick);
StopWatchTimer.Start();
public partial class TestFrom : Form
{
private Thread threadP;
private System.Windows.Forms.Timer Timer = new System.Windows.Forms.Timer();
private string str;
public TestFrom()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
Timer.Interval =100;
Timer.Tick += new EventHandler(TimeBussiness);
Timer.Enabled = true;
Timer.Start();
Timer.Tag = "Start";
}
void TimeBussiness(object sender, EventArgs e)
{
if (threadP.ThreadState == ThreadState.Running)
{
Timer.Stop();
Timer.Tag = "Stop";
}
else
{
//do my bussiness1;
}
}
private void button3_Click(object sender, EventArgs e)
{
ThreadStart threadStart = new ThreadStart(Salver);
threadP= new Thread(threadStart);
threadP.Start();
}
private void Salver()
{
while (Timer.Tag == "Stop")
{
}
//do my bussiness2;
Timer.Start();
Timer.Tag = "Start";
}
}