public void StartStopService()
{
using (var scm = AdvApi32.OpenSCManager(null, null, ScManagerAccessTypes.SC_MANAGER_CONNECT))
{
AssertHandleIsValid(scm);
var access = ServiceAccessTypes.SERVICE_START | ServiceAccessTypes.SERVICE_STOP | ServiceAccessTypes.SERVICE_QUERY_STATUS;
//opens print spooler service
using (var service = AdvApi32.OpenService(scm, "Spooler", access))
{
AssertHandleIsValid(service);
//query service status
var status = AdvApi32.QueryServiceStatusEx <SERVICE_STATUS_PROCESS>(service, SC_STATUS_TYPE.SC_STATUS_PROCESS_INFO);
if (status.dwCurrentState == ServiceState.SERVICE_RUNNING)
{
var ret4 = AdvApi32.StopService(service, out var _);
if (!ret4)
{
Win32Error.ThrowLastError();
}
WaitForServiceStatus(service, ServiceState.SERVICE_STOPPED);
var ret6 = AdvApi32.StartService(service);
if (!ret6)
{
Win32Error.ThrowLastError();
}
}
else
{
var ret4 = AdvApi32.StartService(service);
if (!ret4)
{
Win32Error.ThrowLastError();
}
WaitForServiceStatus(service, ServiceState.SERVICE_RUNNING);
var ret6 = AdvApi32.StopService(service, out var _);
if (!ret6)
{
Win32Error.ThrowLastError();
}
}
}
}
}
public void QueryServiceStatus()
{
using (var scm = AdvApi32.OpenSCManager(null, null, ScManagerAccessTypes.SC_MANAGER_CONNECT))
{
AssertHandleIsValid(scm);
//opens task scheduler service
using (var service = AdvApi32.OpenService(scm, "Schedule", ServiceAccessTypes.SERVICE_QUERY_STATUS))
{
AssertHandleIsValid(service);
//query service status
var status = AdvApi32.QueryServiceStatusEx <SERVICE_STATUS_PROCESS>(service, SC_STATUS_TYPE.SC_STATUS_PROCESS_INFO);
Assert.That(status.dwServiceType, Is.EqualTo(ServiceTypes.SERVICE_WIN32).Or.EqualTo(ServiceTypes.SERVICE_WIN32_SHARE_PROCESS));
Assert.That(status.dwServiceFlags, Is.EqualTo(0));
}
}
}
private static void WaitForServiceStatus(SafeSC_HANDLE service, ServiceState status)
{
//query service status again to check that it changed
var tests = 0;
while (tests < 40)
{
var status2 = AdvApi32.QueryServiceStatusEx <SERVICE_STATUS_PROCESS>(service, SC_STATUS_TYPE.SC_STATUS_PROCESS_INFO);
if (status2.dwCurrentState == status)
{
break;
}
Thread.Sleep(500);
tests++;
}
if (tests >= 40)
{
throw new TimeoutException($"Timed-out waiting for service status {status}");
}
}