How do I invoke a control with Threading.Timer?

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3.50/5 (2 votes)

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Hi,

I'm trying to fire a method thats running on Threading.Timer. The method performs a few calculations then displays the results in a listView control.

Example:

C#

Threading.Timer thrdTimer = new Threading.Timer(myMethod,null,0,1000);

private void myMethod(object obj)
{
   // do some calculations...
   // pass calculation values(val1,val2,val3) to listView

   listView.Items[0].SubItems[1].Text = val1;
   listView.Items[1].SubItems[2].Text = val2;
   listView.Items[2].SubItems[3].Text = val3;
}

How do I go about invoking the listView?

Posted 26-May-11 4:10am

d.allen101

Updated 26-May-11 4:43am

Sandeep Mewara

v4

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Sergey Alexandrovich Kryukov · Answer 1 · 2011-05-26T16:15:00

Hope I'll explain invocation just a bit better than MSDN on the page Abhinav referenced:

Control.Invoke() vs. Control.BeginInvoke()[^],
Problem with Treeview Scanner And MD5[^].

I cannot believe you really need timer. In real life in most cases you should better use threading. For example, if you need to poll something periodically, create a thread and call what you want in cycle calling Thread.Sleep for timing.

Please see this link to my past answers:
How to get a keydown event to operate on a different thread in vb.net[^],
Control events not firing after enable disable + multithreading[^].

—SA

parmar_punit · Answer 2 · 2011-05-26T04:20:00

Solution 2

You should use BackGroundWorkder Component to perform this kind of task...

see the below link
Link1[^]
Link2[^]
Link3[^]

Posted 26-May-11 4:20am

parmar_punit

Abhinav S · Answer 3 · 2011-05-26T04:16:00

Solution 1

You need to use Control.Invoke to call a method on the UI thread - msdn documentation here[^].

Posted 26-May-11 4:16am

Abhinav S

Comments

d.allen101 26-May-11 10:18am

thanks, i've read the article a couple of times still not quite getting it.

Sergey Alexandrovich Kryukov 26-May-11 22:16pm

See my answer then. Better now? If not, ask your questions.
--SA

Sergey Alexandrovich Kryukov 26-May-11 22:17pm

I voted 5 by added links to my own explanation on how it works.
--SA

Abhinav S 27-May-11 0:21am

Thank you SA. I read your answer - hope this helps Donald.