Thread Suspending

Arun Kurmi

this is Error in my code---

Thread_Suspend.cs(12,1): warning CS0618: 'System.Threading.Thread.Suspend()' is obsolete: 'Thread.Suspend has been deprecated. Please use other classes in

System.Threading, such as Monitor, Mutex, Event, and Semaphore, to synchronize Threads or protect resources.

http://go.microsoft.com/fwlink/?linkid=14202'

And my code are:

using System;

using System.Threading;

namespace my{

class program{

static Thread th;

static void Main(){

th=new Thread(MyFunction);

th.Name="My Thread";

Console.WriteLine("Threading start......");

th.Start();

Thread.Sleep(10000);

th.Suspend();

Console.WriteLine("Now Thread Suspended.");

}

static void MyFunction(){

int i;

for(i=1;i<25;i++)

{

int time=new Random().Next(25,50);

Console.WriteLine("Thread {0} display and then thread suspend for {1} milliseconds",th.Name,time.ToString());

Thread.Sleep(time);

}

6 Replies

Know the answer? Post it — somebody with the same question will find it here.

Vulpes13y ago
Accepted answer
It made no difference when I ran the code whether it was from the command prompt or from Visual Studio. The error was always the same:

Unhandled Exception: System.Threading.ThreadStateException: Thread is not running; it cannot be suspended.
at System.Threading.Thread.SuspendInternal()
at System.Threading.Thread.Suspend()
at ConsoleApplication1.Program.Main(String[] args)

You can easily change the program to use Join() rather than Suspend() as follows:

using System;
using System.Threading;

namespace ConsoleApplication1
{
class Program
{
static Thread th;
static void Main(string[] args)
{
th = new Thread(MyFunction);
th.Name = "My Thread";
Console.WriteLine("Threading start......");
th.Start();
//Thread.Sleep(10000); // don't need this now
th.Join(); // Join instead of Suspend
Console.WriteLine("Now Main Thread Suspended.");
}

static void MyFunction()
{
int i;
for (i = 1; i < 25; i++)
{
int time = new Random().Next(25, 50);
Console.WriteLine("Thread {0} display and then thread suspend for {1} milliseconds", th.Name, time.ToString());
Thread.Sleep(time);
}
}
}
}

There is no error now when this runs.
0
Sanjeeb Lenka13y ago
hi,
Check these links for example.

http://programsnippets.wordpress.com/2013/04/21/sample-to-create-start-pause-resume-and-terminate-a-thread-in-c/

http://codesmesh.com/threading-in-c-sharp-with-example/
0
Arun Kurmi13y ago
hello Valpes or Other dear friends can you provide my code using join(),Resume() as your(Valpes) reply...
0
Arun Kurmi13y ago
Above code give an error(mention in my above post) while running it through cmd prompt but when i replace default code of program.cs by my above code in VS in ConsoleApplication project then there is no error.Why???
0
Vulpes13y ago
I'm just wondering, Arun, whether you intended to call th.Join() rather than th.Suspend as I don't see you calling th.Resume() anywhere?

th.Join() will suspend the main thead until the subsidiary thread has ended or, if the subsidiary thread has already ended, the main thread will continue until the process exits.

As things stand, the subsidiary thread will probably have ended by the time th.Suspend() is reached and you'll then get a ThreadStateException because a Thread can't be suspended unless it's running.

Worse still, if the subsidiary thead hasn't ended by the time th.Suspend() is reached, then the main thread will terminate but the subsidiary thread will still be suspended and, as it's a foreground thread, the process will be unable to end. You'll then have to kill it from the Task Manager.
0
Iftikar Hussain13y ago
Hi,
Please refer the below link

http://stackoverflow.com/questions/382173/what-are-alternative-ways-to-suspend-and-resume-a-thread

http://stackoverflow.com/questions/4509067/c-sharp-threading-suspend-in-obsolete-thread-has-been-deprecated

http://www.codeproject.com/Questions/352351/Alternate-way-for-Thread-Suspend-and-Thread-Resume

Regards,
Iftikar
0