ServiceController.WaitForStatus Method (ServiceControllerStatus)

 

Infinitely waits for the service to reach the specified status.

Namespace:   System.ServiceProcess
Assembly:  System.ServiceProcess (in System.ServiceProcess.dll)

Public Sub WaitForStatus (
	desiredStatus As ServiceControllerStatus
)

Parameters

desiredStatus
Type: System.ServiceProcess.ServiceControllerStatus

The status to wait for.

Exception Condition
InvalidEnumArgumentException

The desiredStatus parameter is not any of the values defined in the ServiceControllerStatus enumeration.

Use WaitForStatus to suspend an application's processing until the service has reached the required status.

System_CAPS_noteNote

The WaitForStatus method waits approximately 250 milliseconds between each status check. WaitForStatus cannot detect the case of the observed service changing to the desiredStatus and then immediately to another status in that interval.

The following example uses the ServiceController class to check whether the Alerter service is stopped. If the service is stopped, the example starts the service and waits until the service status is set to Running.


' Check whether the Alerter service is started.

Dim sc As New ServiceController()
sc.ServiceName = "Alerter"
Console.WriteLine("The Alerter service status is currently set to {0}", sc.Status)

If sc.Status = ServiceControllerStatus.Stopped Then
   ' Start the service if the current status is stopped.
   Console.WriteLine("Starting the Alerter service...")

   Try
      ' Start the service, and wait until its status is "Running".
      sc.Start()
      sc.WaitForStatus(ServiceControllerStatus.Running)

      ' Display the current service status.
      Console.WriteLine("The Alerter service status is now set to {0}.", sc.Status)
   Catch 
      Console.WriteLine("Could not start the Alerter service.")
   End Try
End If

.NET Framework
Available since 1.1
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