public static int Main(string[] args)
{
//Create event query to be notified within 1 second of a change in a service
WQLEventQuery query = new WQLEventQuery("__InstanceModificationEvent", new TimeSpan(0, 0, 1), "TargetInstance isa \"Win32_Service\"");
//Initialize an event watcher and subscribe to events that match this query
ManagementEventWatcher watcher = new ManagementEventWatcher(query);
//wait for 5 events
int i = 0;
while (i < 5)
{
//Block until the next event occurs
ManagementBaseObject e = watcher.WaitForNextEvent();
//Display information from the event
Console.WriteLine("Service {0} has changed, State is {1}",
((ManagementBaseObject)e["TargetInstance"])["Name"],
((ManagementBaseObject)e["TargetInstance"])["State"]);
i++;
}
//cancel the subscription
watcher.Stop();
return(0);
}
public static int Main(string[] args)
{
// Create a timer event instance
ManagementClass timerClass = new ManagementClass("root/default",
"__IntervalTimerInstruction",
null);
ManagementObject timerObj = timerClass.CreateInstance();
timerObj["IntervalBetweenEvents"] = 500; //fire every half a second
timerObj["TimerID"] = "Timer62";
timerObj.Put();
// Create an EventWatcherOptions
EventWatcherOptions options = new EventWatcherOptions();
options.Timeout = new TimeSpan(0, 0, 0, 5, 0); // timeout in 5 secs
options.BlockSize = 2;
// Create an event query
WQLEventQuery query = new WQLEventQuery("__TimerEvent", "TimerID='Timer62'");
// Create an event watcher and subscribe the events that matches the event query
ManagementEventWatcher watcher = new ManagementEventWatcher(
new ManagementScope("root/default"),
query,
options);
// Create a Stopped handler
EventStoppedHandler stopHandlerObj = new EventStoppedHandler();
watcher.Stopped += new StoppedEventHandler(stopHandlerObj.Stopped);
// Block until next event arrives or throw a ManagementException:TimedOut
ManagementBaseObject e = watcher.WaitForNextEvent();
// Assertion: Event was received.
// Cancel subscription
watcher.Stop();
while (!stopHandlerObj.IsStopped)
{
System.Threading.Thread.Sleep(1000);
}
return(0);
}
public static int Main(string[] args)
{
//Create event query to receive timer events
WQLEventQuery query = new WQLEventQuery("__TimerEvent", "TimerId=\"Timer1\"");
//Initialize an event watcher and subscribe to events that match this query
ManagementEventWatcher watcher = new ManagementEventWatcher(query);
//Setup a listener for events
watcher.EventArrived += new EventArrivedEventHandler((new EventHandler()).HandleEvent);
watcher.Start();
Thread.Sleep(10000);
watcher.Stop();
return(0);
}
public static int Main(string[] args)
{
try
{
// Create a timer event instance
ManagementClass timerClass = new ManagementClass("root/default",
"__IntervalTimerInstruction",
null);
ManagementObject timerObj = timerClass.CreateInstance();
timerObj["IntervalBetweenEvents"] = 5000; //fire every ten seconds
timerObj["TimerID"] = "Timer612";
timerObj.Put();
// Create an EventWatcherOptions
EventWatcherOptions options = new EventWatcherOptions();
options.Timeout = new TimeSpan(0, 0, 0, 2, 0); // time out in 2 secs
options.BlockSize = 2;
// Create an event query
WQLEventQuery query = new WQLEventQuery("__TimerEvent",
"TimerID='Timer612'");
// Create an event watcher and subscribe the events that matches the event query
ManagementEventWatcher watcher = new ManagementEventWatcher(
new ManagementScope("root/default"),
query,
options);
// Block until next event arrives or throw a ManagementException:TimedOut
ManagementBaseObject e = watcher.WaitForNextEvent();
// Assertion: Event was received.
Console.WriteLine("Unable to specify Timeout for an event when calling ManagementEventWatcher.WaitForNextEvent().");
return(1);
}
catch (ManagementException e)
{
Console.WriteLine("Error Message is " + e.Message);
Console.WriteLine("Error Code is " + e.ErrorCode);
Console.WriteLine("Status.Timedout is " + ManagementStatus.Timedout);
if (ManagementStatus.Timedout == e.ErrorCode)
{
// Assertion: Event was not received within time out period
// Clean up -
ManagementObject timerObj = new ManagementObject("root/default:__IntervalTimerInstruction.TimerID='Timer612'");
timerObj.Delete();
Console.WriteLine("Test6.1.2: Able to specify Timeout for an event when calling ManagementEventWatcher.WaitForNextEvent().");
return(0);
}
else
{
Console.WriteLine("Test6.1.2: Unable to specify Timeout for an event when calling ManagementEventWatcher.WaitForNextEvent().");
return(1);
}
}
catch (Exception e)
{
Console.WriteLine("Test6.1.2: " + e.GetType());
Console.WriteLine(e.Message + e.StackTrace);
return(1);
}
}
