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();
}
Related
I have some code involving a system timer that starts counting in seconds when a file is added to a folder then stops when it is removed. when the timer is stopped is shows the correct time however when I restart the timer it picks up where it left off instead of restarting at 0. Here is my code..
t2 = new System.Timers.Timer();
t2.AutoReset = true;
t2.Interval = 1000;
t2.Elapsed += OnTimeEvent2;
watch();
}
private void OnTimeEvent2(object sender, System.Timers.ElapsedEventArgs e)
{
Invoke(new Action(() =>
{
s += 1;
lblSeconds.Text = string.Format(s.ToString());
}));
}
Use the System.Windows.Forms.Timer so you don't need to worry about cross-threading. Here's a quick example of using the Stopwatch class:
private System.Windows.Forms.Timer tmr = new Timer();
private System.Diagnostics.Stopwatch sw = new System.Diagnostics.Stopwatch();
private void Form1_Load(object sender, EventArgs e)
{
tmr.Interval = 1000;
tmr.Tick += Tmr_Tick;
tmr.Start();
sw.Start();
}
private void Tmr_Tick(object sender, EventArgs e)
{
lblSeconds.Text = ((int)sw.Elapsed.TotalSeconds).ToString();
}
To make the timer start from zero again, simply use the Restart() method:
private void button1_Click(object sender, EventArgs e)
{
sw.Restart();
}
I would recommend using DispatcherTimer instead. That way you don't need to invoke on the GUI thread manually. Also, it will reset on Stop/Start.
You might want to do something else to prevent many timers from running:
When a file is created register the DateTime somewhere and put a filesystemwatcher on the file.
..then on the watchers deleted event get the DateTime once more and compare them.
In fact, if you're just monitoring a folder for the appearance adn disappearance of a specific file the filesystemwatcher can help you detect both events.
Else remember to reste your counter manually when you detect the file deletion.
This is the code that I am trying to execute, but stepping through my code I never see any progress indicated or updated on my windows form showing progressbar1. This is my 1st attempt in getting a background worker to function properly, and all I have is a windows form with one button on it and this is all of the code involved in the project.
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
private int i = 0;
public Form1()
{
InitializeComponent();
backgroundWorker1.WorkerReportsProgress = true;
backgroundWorker1.WorkerSupportsCancellation = false;
backgroundWorker1.DoWork += new DoWorkEventHandler(backgroundWorker1_DoWork);
backgroundWorker1.ProgressChanged += new ProgressChangedEventHandler(backgroundWorker1_ProgressChanged);
backgroundWorker1.RunWorkerCompleted += new RunWorkerCompletedEventHandler(backgroundWorker1_RunWorkerCompleted);
}
private void button1_Click(object sender, EventArgs e)
{
backgroundWorker1.RunWorkerAsync();
}
private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
BackgroundWorker worker = sender as BackgroundWorker;
ReadySteadyGo();
worker.ReportProgress((i * 10));
FinalizeAndFinish();
worker.ReportProgress((i * 10));
}
private void backgroundWorker1_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
progressBar1.Text = "Done!";
}
private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
progressBar1.Text = (e.ProgressPercentage.ToString() + "%");
}
private void ReadySteadyGo()
{
Thread.Sleep(100000);
}
private void FinalizeAndFinish()
{
Thread.Sleep(1000);
}
}
It appears that you are using Thread.Sleep() to simulate a long-running operation. There are a few things you should consider based on your code example:
When the backgroundWorker1.RunWorkerAsync(); is executed, it starts working on another thread. Thus, if you are debugging interactively and you have not set a breakpoint in the backgroundWorker1_DoWork method, you are not likely to see this code execute.
When the Thread.Sleep(100000) executes, it essentially means that the background worker will pause for 100 seconds - so you need to make sure you are waiting at least that long to see the UI updated.
Also, as per Hans Passant's comment, consider the following:
Nor can you see it doing anything, there's no point to assigning the
ProgressBar.Text property since it doesn't display text. Set Value
instead.
I recreated your example in Visual Studio and am hitting a breakpoint in backgroundWorker1_DoWork so the multi-threading is working properly, you just need to do proper processing?
private void button1_Click(object sender, EventArgs e)
{
backgroundWorker1.RunWorkerAsync();
}
private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
for (int i = 1; i <= 100; i++)
{
backgroundWorker1.ReportProgress(i);
Thread.Sleep(100);
}
}
private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
progressBar1.Value = e.ProgressPercentage;
}
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.
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();
}
}
Could any one help me to stop my timer in windows form C3 application? I added timer in form using designer and interval is set as 1000; I would like to do some actions after 5 seconds of waiting after button click. Please check the code and advise me. Problem now is I get MessageBox2 infinitely and never gets the timer stop.
static int count;
public Form1()
{
InitializeComponent();
timer1.Tick += timer1_Tick;
}
public void button1_Click(object sender, EventArgs e)
{
timer1.Enabled = true;
while(count>5)
{
....dosome actions...
}
}
private void timer1_Tick(object sender, EventArgs e)
{
count1++;
MessageBox.Show("Messagebox2");
if (count1 == 5)
{
//timer1.Enabled = false; timer1.Stop();
((System.Timers.Timer)sender).Enabled = false;
MessageBox.Show("stopping timer");
}
}
I would render the count useless and just use the timer 1 interval property and put your actions in the timer1_Tick event.
public void button1_Click(object sender, EventArgs e)
{
timer1.Interval = 5000;
timer1.Enabled = true;
}
private void timer1_Tick(object sender, EventArgs e)
{
timer1.Enabled = false;
MessageBox.Show("stopping timer");
// Your other actions here
}
You are incrementing count1 and checking count.
while(count1 > 5)
{
...dosome actions...
}
Which Timer do you use? Because C# supports class Timer from two different namespaces. One is from Forms, the other is from System.Timers. I would suggest you to use the other one - System.Timers.Timer.
Timer t = new Timer(20000); // created with 20seconds
t.Enabled = true; // enables firing Elapsed event
t.Elapsed += (s, e) => {
\\do stuff
};
t.Start();
In this short code you can see how the timer is created and enabled. By registering to the Elapsed event you explicitly say what to do after the time elapses. and this is done just once. Of course, there are some changes needed in case user clicks button before your limit is reached. But this is highly dependent on behavior of the action you demand.