CODEWITHSUNDEEP
c#asp.netwindows-services
user2500561
user2500561

Reputation: 133

Start window service and check if it stop

As my question here: Stop program when thread finished?

I have a window service and an aspx page. In aspx page, I have to start the service. This service will run a thread, after thread finish, it will stop the service. After that, my aspx page have to show result to screen.

So, I have to: Check if service running - Start service - check if services stop - Print result to screen.

Currently, my code is like: 

while(true){
    if(isServiceStop){
         MyService.Start();
         while(true){
              if(isServiceStop){
                   Print result;
                   break;
              }
         }
         break;
    }
}

This way, it will skyrocket my CPU_Usage, so, I want to know if there is any other way to achieve my request

Upvotes: 0

Views: 1411

Answers (2)

user2500561
user2500561

Reputation: 133

I found that service have method WaitForStatus, so I only need to use below code and it work perfectly: 

Myservice.WaitForStatus(ServiceControllerStatus.Stopped);

Upvotes: 0

Jim Mischel
Jim Mischel

Reputation: 133975

Create two EventWaitHandle objects to indicate the service's status:

private EventWaitHandle ServiceRunningEvent;
private EventWaitHandle ServiceStoppedEvent;

// in service startup
ServiceRunningEvent = new EventWaitHandle(False, EventResetMode.Manual, "RunningHandleName");
ServiceStoppedEvent = new EventWaitHandle(False, EventResetMode.Manual,

"ServiceStoppedEvent");

// Show service running
ServiceStoppedEvent.Reset();
ServiceRunningEvent.Set();

And when the service exits, have it flip the values:

ServiceRunningEvent.Reset();
ServiceStoppedEvent.Set();

In your ASP.NET application, you create the wait handles in the same way, but rather than setting their values, you wait on them. So:

// if service isn't running, start it and wait for it to signal that it's started.
if (!ServiceRunningEvent.WaitOne(0))
{
    // Start the service
    // and wait for it.
    ServiceRunningEvent.WaitOne();
}

// now wait for the service to signal that it's stopped

ServiceStoppedEvent.WaitOne();

I do wonder, however, why you'd want to start and stop a service so often. Why not just have the service running all the time, and send signals when you need it to do things?

Upvotes: 1

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