Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

Solved

Run Multiple Threads in Parallel

Posted on 2013-01-03

1 solution

Medium Priority

394 Views

Last Modified: 2013-01-08

Hello Experts,

I'm using the following code to run a Thread in parallel to the program:

            Thread myThread = new System.Threading.Thread(delegate()
            {
                //Your code here
                System.Threading.Thread.Sleep(14000);
                close_window_by_handle(ie);
            });
            myThread.Start();

Open in new window

In this code I need to wait 14 seconds ( according to the customer request )

the problem is when I run this code few times during 14 seconds it stuck

How do I enhance my code check if a thread is running, if YES it create a new thread in addition to the running one
else it use the Stopped thread

Thanks

Comment

Question by:madmare

[X]

Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

Help others & share knowledge
Earn cash & points
Learn & ask questions

Join The Community

7 Comments

LVL 75

Expert Comment

by:käµfm³d 👽

ID: 387397682013-01-03

What do you mean by "else it use the Stopped thread?" A terminated thread cannot be restarted, and you must create a new Thread instance in that case.

Author Comment

by:madmare

ID: 387397752013-01-03

I'll fix my self

in any way create new Thread :)

Thanks

LVL 36

Expert Comment

by:Miguel Oz

ID: 387398022013-01-03

Is this a desktop app (eg. Winform) or Asp.net?
How many threads are you running in parallel in your App?

If this number is small (<20) then you can use ThreadPool.QueueUserWorkItem
else consider using TPL (.Net 4.0 up)

Note: Check TPL vs queueuserworkitem

Author Comment

by:madmare

ID: 387398152013-01-03

can you please give me the example for ThreadPool.QueueUserWorkItem ?

Thanks

LVL 36

Expert Comment

by:Miguel Oz

ID: 387398252013-01-03

Check the example to run the method ProcessFile at:
http://www.dotnetperls.com/threadpool

Author Comment

by:madmare

ID: 387399952013-01-03

Thanks mas

I looked again to the request, I think that TPL can be helpful for me

can you please help to convert my code to TPL

Thanks

LVL 36

Accepted Solution

by:Miguel Oz

Miguel Oz earned 2000 total points

ID: 387501992013-01-07

using System.Threading.Tasks;

Open in new window

Your code should look like:

            Parallel.Invoke(
                () => {
                    //Your code here
                System.Threading.Thread.Sleep(14000);
                close_window_by_handle(ie);
                }
            );

Open in new window

Note: I use Parallel.Invoke because you are not returning any value.
If you are returning a value use:

Task<int> task1 = Task<int>.Factory.StartNew(() => DoWork());
// Get the results and write them out.
Console.WriteLine("Result ={0}", task1.Result);

Open in new window

where

static int DoWork()
{
     //Your code here
     System.Threading.Thread.Sleep(14000);
     close_window_by_handle(ie);
     return 0;
}

Open in new window

Featured Post

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Datagridview hiding rowheader record selectors

Article by: gpizzuto

In order to hide the "ugly" records selectors (triangles) in the rowheaders, here are some suggestions. Microsoft doesn't have a direct method/property to do it. You can only hide the rowheader column. First solution, the easy way The first sol…

Did you know that C# foreach statement is your enemy in games development?

Article by: Giuseppe "Pino"

Performance in games development is paramount: every microsecond counts to be able to do everything in less than 33ms (aiming at 16ms). C# foreach statement is one of the worst performance killers, and here I explain why.

[Webinar] How Hackers Steal Your Credentials and Why Active Directory Must be Secure to Stop Them

Video by: Experts Exchange

Sometimes it takes a new vantage point, apart from our everyday security practices, to truly see our Active Directory (AD) vulnerabilities. We get used to implementing the same techniques and checking the same areas for a breach. This pattern can re…

How to record your desktop screen

Video by: Kiara

Want to learn how to record your desktop screen without having to use an outside camera. Click on this video and learn how to use the cool google extension called "Screencastify"! Step 1: Open a new google tab Step 2: Go to the left hand upper corn…