How to run again thread Windows Forms?

Question

2.00/5 (2 votes)

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My application (Windows Forms) has two thread (A, B). Now i want to run 2 threads in
my app (after 5 seconds to repeat 2 thread)????

Can you help me????

Posted 17-Apr-11 5:32am

Nguyen Tuan

Updated 17-Apr-11 5:33am

v2

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5 solutions

Solution 2

Once a thread is aborted or terminates normally, you can't just restart it. You have to reinstantiate it.

Posted 17-Apr-11 5:41am

#realJSOP

Comments

Nguyen Tuan 17-Apr-11 11:47am

Hi John Simmons,
Have you a small example???

Sergey Alexandrovich Kryukov 17-Apr-11 13:28pm

Correct, my 5.
Therefor, the ultimate solution is to keep it running infinitely.
Please see my Answer.
--SA

Solution 3

Are you going to continuously create new threads at every 5 seconds interval? or think about using a Thread Pool?

If thread pool you can start with here http://msdn.microsoft.com/en-us/library/3dasc8as%28v=vs.80%29.aspx[^] + google + code project has many expert answers already in threading I guess.

Posted 17-Apr-11 6:44am

Albin Abel

Comments

Sergey Alexandrovich Kryukov 17-Apr-11 13:29pm

I voted 5 but later noticed you offer a pool -- this is better but not a right solution.
I thing the ultimate solution is mine, please see.
--SA

Nguyen Tuan 17-Apr-11 13:37pm

Hi Albin Abel,
Not create new thread. I want use created thread.
I use Timer (Windows Control) but my app runs slowly. I thinks thread is solutions

Solution 1

http://msdn.microsoft.com/en-us/library/ms173178(v=VS.100).aspx[^]

Look there for more information on threads.

Posted 17-Apr-11 5:35am

Fabio V Silva

Comments

Nguyen Tuan 17-Apr-11 11:47am

Hi Fabio V Silva,
Have you a small example???

Fabio V Silva 17-Apr-11 11:48am

Can you post a snippet of your code and explain in more detail what you are trying to do?

Nguyen Tuan 17-Apr-11 13:49pm

Hi Fabio V Silva,

My app:

private Thread threadGet;
private Thread threadSet;
private string strHTML = "";

private void GetHTML()
{
try
{
HtmlWindow mainFrame = webBrowserTest.Document.Window.Frames["mainFrame"];
HtmlElement element = mainFrame.Document.GetElementById("element");
strHTML = (element.OuterHtml != null) ? element.OuterHtml : "";
}
catch {}
}

private void SetAreaText()
{
txtHTML.Text = strHTML;
}

private void cmdGetHtml_Click(object sender, EventArgs e)
{
threadGet = new Thread(GetHTML);
threadSet = new Thread(SetAreaText);
threadGet.Start();
threadSet.Start();
}

When i click button cmdGetHtml, HTML shows in txtHTML.
Now i want to auto click button 5 seconds interval??

Note: I fixed safe-thread in Windows Control

Fabio V Silva 17-Apr-11 13:56pm

I think I would use a Timer in this case if all you want to do is call the function every specified interval of time.

Nguyen Tuan 17-Apr-11 14:01pm

Hi Fabio V Silva,
I used Timer but my app runs slowly (CPU load 100% at 6th second). Now i want to optimize it. I think Thread solve this solution??????

Fabio V Silva 17-Apr-11 14:06pm

I'm not very proficient with threads, to be honest, you can probably use SAKryukov solution and call the function on your thread every 5s but, because of the time interval, you would probably still get your CPU at 100%...
Let's hope some of the guys can help you better then I with this...

Sergey Alexandrovich Kryukov 17-Apr-11 13:27pm

A bit too general. Please see my Solution -- kind of an ultimate one.
--SA

Fabio V Silva 17-Apr-11 13:29pm

So was the question. Did you really understand what the OP is trying to do?

Sergey Alexandrovich Kryukov 17-Apr-11 13:46pm

Pretty much, see my Answer.
--SA

Fabio V Silva 17-Apr-11 13:55pm

You didn't answer his question, see his reply above for his real doubt (how to call a function every 5s.

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Sergey Alexandrovich Kryukov · Accepted Answer · 2011-04-17T07:26:00

Solution 4

Don't start it again! Make it run forever but keep it in a wait state when not used.

See my recent Solution here: Running exactly one job/thread/process in webservice that will never get terminated (asp.net)[^]. Trust me (but try it by yourself), this is much better solution.

—SA

Posted 17-Apr-11 7:26am

Sergey Alexandrovich Kryukov

v2

Comments

Albin Abel 17-Apr-11 13:34pm

I was thinking about your tip and trick to give in my answer as an additional point, but then just forgot the link. I will bookmark it now. :). My 5

Sergey Alexandrovich Kryukov 17-Apr-11 13:44pm

Thank you. I got my chance to answer by myself :-)
--SA

Nguyen Tuan · Accepted Answer · 2011-04-18T06:33:00

Thanks all,

I solved my solution. I change Timers (System.Windows.Forms) to Timers (System.Timers.Timer). My app runs faster...

My experience:
- If you use Timers (System.Windows.Forms): my app is only one thread (UI Thread). This thread must be share to process UI, get data and show data.
- If you use Timers (System.Timers.Timer): my app has 2 threads (UI Thread, second thread - get and show data). Both of two threads can transfer data.

Now, i research Timers (System.Threading.Timers). If i finish, i post the solution (use System.Threading.Timers)