I would like to set a textbox text to "blink" by changing text colors when a button is clicked.
I can get the text to blink how I want it to, but I want it to stop after a few blinks. I cannot figure out how to make it stop after the timer fires a few times.
Here is my code:
public Form1()
{
InitializeComponent();
Timer timer = new Timer();
timer.Interval = 500;
timer.Enabled = false;
timer.Start();
timer.Tick += new EventHandler(timer_Tick);
if (timerint == 5)
timer.Stop();
}
private void timer_Tick(object sender, EventArgs e)
{
timerint += 1;
if (textBoxInvFooter.ForeColor == SystemColors.GrayText)
textBoxInvFooter.ForeColor = SystemColors.Highlight;
else
textBoxInvFooter.ForeColor = SystemColors.GrayText;
}
I know my problem lies with how I'm using the "timerint", but I'm not sure where to put it, or what solution I should use...
Thank you for all your help!
You just have to put the timer check inside the Tick handler. You can access the Timer object by using the sender argument of the handler.
private void timer_Tick(object sender, EventArgs e)
{
// ...
timerint += 1;
if (timerint == 5)
{
((Timer)sender).Stop();
}
}
Here's the complete code that I would use to solve your issue. It correctly stops the timer, detaches the event handler, and disposes the timer. It disables the button during the flashing, and also restores the colour of the textbox after the five flashes are complete.
The best part is that it is purely defined within the one lambda, so no class-level variables required.
Here it is:
button1.Click += (s, e) =>
{
button1.Enabled = false;
var counter = 0;
var timer = new Timer()
{
Interval = 500,
Enabled = false
};
EventHandler handler = null;
handler = (s2, e2) =>
{
if (++counter >= 5)
{
timer.Stop();
timer.Tick -= handler;
timer.Dispose();
textBoxInvFooter.ForeColor = SystemColors.WindowText;
button1.Enabled = true;
}
else
{
textBoxInvFooter.ForeColor =
textBoxInvFooter.ForeColor == SystemColors.GrayText
? SystemColors.Highlight
: SystemColors.GrayText;
}
};
timer.Tick += handler;
timer.Start();
};
Related
I have a timer that repeats at 1 second intervals. Users can Start() or Stop() the timer.
System.Windows.Form.Timer timer = new();
timer.Interval = 1000;
timer.Tick += (sender, e) =>
{
// Perform the action...
}
The problem is that in case of timer.Stop() it reacts immediately after pressing, but in case of timer.Start() it works after 1 second. This may feel strange to users.
So I solved it like this:
System.Windows.Form.Timer timer = new();
timer.Interval = 1;
timer.Tick += (sender, e) =>
{
if (timer.Interval == 1)
{
timer.Interval = 1000;
}
// Perform the action...
}
private void StopButton_Click(object sender, EventArgs e)
{
timer.Stop();
timer.Interval = 1;
}
However, there is a problem that the timer's Interval must be continuously set to 1. One timer is fine, but having multiple complicates things.
Is there any other way?
Following comments from #jmcilhinney and #Zohar Peled, I solved it like this:
System.Windows.Form.Timer timer = new();
timer.Interval = 1000;
timer.Tick += (sender, e) =>
{
StartOnFirstTimer();
}
private void StartOnFirstTimer()
{
// Perform the action...
}
private void StartButton_Click(object sender, EventArgs e)
{
StartOnFirstTimer();
timer.Start();
}
It is extracted the part corresponding to the timer's Tick event into a method and call it before starting it.
I have the following timer implementation. But the timer is not running every 5 seconds as needed. How can make this run every 5 seconds. At present its running about once in 30 seconds.
private void button1_Click(object sender, RoutedEventArgs e)
{
msgsent = 0;
timer.Tick += timer_Tick;
timer.Interval = new TimeSpan(0, 0, 5);
bool isenable = timer.IsEnabled;
timer.Start();
}
private async void timer_Tick(object sender, object e)
{
if (geo == null)
{
geo = new Geolocator();
}
Geoposition posi = await geo.GetGeopositionAsync();
if (posi.Coordinate.Point.Position.Latitude <= 12.9227 && posi.Coordinate.Point.Position.Longitude >= 080.1320)
{
if (msgsent <=1)
{
msgsent = msgsent + 1;
ShowDialog(new MessageDialog("Your Bus has crossed xyz"));
}
}
}
I'll give you a hint. If you understand where each goes, then it should be clear. If not, you will once you get better.
// in the class definition
int msgsent;
Timer timer;
and
// in the constructor
timer = new Timer();
timer.Tick += timer_Tick;
timer.Interval = new TimeSpan(0, 0, 5);
and
// in the Button.Click event handler
timer.Start();
and
// in the Timer.Tick event handler
timer.Stop();
/* do your work here */
timer.Start();
There will be further issues when the user is clicking the button while you're doing your work, but that's beyond the scope of this question.
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've no real idea how to do this and I have tried messing with a timer but to no avail so far.
So what am I trying to do?
I have a label that is blank. When a certain event is triggered I want the label to say "Competition successfully setup" for a period of 5 seconds after which I want it to return to being blank.
Surely this can be done?? Can it? I have played around with a timer but I seem to be well off the mark.
Any help would be most welcome. My feeble attempt is below.
private void UpdateLabel(object sender, EventArgs e)
{
var timer = new Timer()
{
Interval = 5000,
};
timer.Tick += (s, evt) =>
lblCompetitionSetupSuccess.Text = "Competition successfully setup";
timer.Start();
lblCompetitionSetupSuccess.Text = string.Empty;
}
Try the other way around:
private void button1_Click(object sender, EventArgs e)
{
label1.Text = "I will vanish in 5 sec";
var timer = new Timer();
timer.Interval = 5000;
timer.Tick += (o, args) => label1.Text = "";
timer.Start();
}
First set the label to whatever text you want it to display for 5 sec
label1.Text = "I will vanish in 5 sec";
Then setup your timer so that on timer elapsed it will remove the text
var timer = new Timer();
timer.Interval = 5000;
timer.Tick += (o, args) => label1.Text = "";
timer.Start();
If you want the timer to stop after the first timer elapse:
timer.Tick += (o, args) =>
{
label1.Text = "";
timer.Enabled = false;
};
Make sure you're using the System.Windows.Forms.Timer class, which calls the tick event on the UI thread.
I have a Windows.Forms.Timer in my code, that I am executing 3 times. However, the timer isn't calling the tick function at all.
private int count = 3;
private timer;
void Loopy(int times)
{
count = times;
timer = new Timer();
timer.Interval = 1000;
timer.Tick += new EventHandler(timer_Tick);
timer.Start();
}
void timer_Tick(object sender, EventArgs e)
{
count--;
if (count == 0) timer.Stop();
else
{
// Do something here
}
}
Loopy() is being called from other places in the code.
Try using System.Timers instead of Windows.Forms.Timer
void Loopy(int times)
{
count = times;
timer = new Timer(1000);
timer.Enabled = true;
timer.Elapsed += new ElapsedEventHandler(timer_Elapsed);
timer.Start();
}
void timer_Elapsed(object sender, ElapsedEventArgs e)
{
throw new NotImplementedException();
}
If the method Loopy() is called in a thread that is not the main UI thread, then the timer won't tick.
If you want to call this method from anywhere in the code then you need to check the InvokeRequired property. So your code should look like (assuming that the code is in a form):
private void Loopy(int times)
{
if (this.InvokeRequired)
{
this.Invoke((MethodInvoker)delegate
{
Loopy(times);
});
}
else
{
count = times;
timer = new Timer();
timer.Interval = 1000;
timer.Tick += new EventHandler(timer_Tick);
timer.Start();
}
}
I am not sure what you are doing wrong it looks correct, This code works: See how it compares to yours.
public partial class Form1 : Form
{
private int count = 3;
private Timer timer;
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
Loopy(count);
}
void Loopy(int times)
{
count = times;
timer = new Timer();
timer.Interval = 1000;
timer.Tick += new EventHandler(timer_Tick);
timer.Start();
}
void timer_Tick(object sender, EventArgs e)
{
count--;
if (count == 0) timer.Stop();
else
{
//
}
}
}
Here's an Rx ticker that works:
Observable.Interval(TimeSpan.FromSeconds(1))
.Take(3)
.Subscribe(x=>Console.WriteLine("tick"));
Of course, you can subscribe something more useful in your program.
you may have started the timer from another thread, so try invoking it from the correct thread.
for example, instead of:
timerX.start();
Use:
Invoke((MethodInvoker)delegate { timerX.Start(); });
Check if your timer in properties is enabled.
Mine was false and after setting to true it worked.
If you are using Windows.Forms.Timer then should use something like following.
//Declare Timer
private Timer _timer= new Timer();
void Loopy(int _time)
{
_timer.Interval = _time;
_timer.Enabled = true;
_timer.Tick += new EventHandler(timer_Elapsed);
_timer.Start();
}
void timer_Elapsed(object sender, EventArgs e)
{
//Do your stuffs here
}
If you use some delays smaller than the interval inside the timer, the system.timer will execute other thread and you have to deal with a double thread running at the same time. Apply an InvokeRequired to control the flow.