【发布时间】：2013-11-19 01:32:07
【问题描述】：
我正在尝试在 C# 中 P/Invoke NotifyServiceStatusChange event 以检查服务何时停止。我设法让它编译和运行没有任何错误，但是现在，当我停止服务时，它似乎不想通知它已经死了。任何想法为什么会这样？您可以通过将此代码复制到空白控制台应用程序中来测试它；只需确保将“我的服务名称”替换为您的服务名称（下面有此字符串的两个实例）。
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
namespace ConsoleApplication1
{
class Program
{
public delegate void StatusChanged(IntPtr parameter);
public class SERVICE_NOTIFY : MarshalByRefObject
{
public uint dwVersion;
public StatusChanged pfnNotifyCallback;
public IntPtr pContext;
public uint dwNotificationStatus;
public SERVICE_STATUS_PROCESS ServiceStatus;
public uint dwNotificationTriggered;
public IntPtr pszServiceNames;
};
public struct SERVICE_STATUS_PROCESS {
public uint dwServiceType;
public uint dwCurrentState;
public uint dwControlsAccepted;
public uint dwWin32ExitCode;
public uint dwServiceSpecificExitCode;
public uint dwCheckPoint;
public uint dwWaitHint;
public uint dwProcessId;
public uint dwServiceFlags;
};
[DllImport("advapi32.dll", SetLastError = true, CharSet = CharSet.Auto)]
static extern IntPtr OpenService(IntPtr hSCManager, string lpServiceName, uint dwDesiredAccess);
[DllImport("advapi32.dll", EntryPoint = "OpenSCManagerW", ExactSpelling = true, CharSet = CharSet.Unicode, SetLastError = true)]
public static extern IntPtr OpenSCManager(string machineName, string databaseName, uint dwAccess);
[DllImport("advapi32.dll", SetLastError = true)]
public static extern uint NotifyServiceStatusChange(IntPtr hService, uint dwNotifyMask, ref IntPtr pNotifyBuffer);
public static SERVICE_NOTIFY notify;
public static GCHandle notifyHandle;
public static IntPtr unmanagedNotifyStructure;
static void Main(string[] args)
{
IntPtr hSCM = OpenSCManager(null, null, (uint)0xF003F);
if (hSCM != IntPtr.Zero)
{
IntPtr hService = OpenService(hSCM, "My Service Name", (uint)0xF003F);
if (hService != IntPtr.Zero)
{
StatusChanged changeDelegate = ReceivedStatusChangedEvent;
notify = new SERVICE_NOTIFY();
notify.dwVersion = 2;
notify.pfnNotifyCallback = changeDelegate;
notify.pContext = IntPtr.Zero;
notify.dwNotificationStatus = 0;
SERVICE_STATUS_PROCESS process;
process.dwServiceType = 0;
process.dwCurrentState = 0;
process.dwControlsAccepted = 0;
process.dwWin32ExitCode = 0;
process.dwServiceSpecificExitCode = 0;
process.dwCheckPoint = 0;
process.dwWaitHint = 0;
process.dwProcessId = 0;
process.dwServiceFlags = 0;
notify.ServiceStatus = process;
notify.dwNotificationTriggered = 0;
notify.pszServiceNames = Marshal.StringToHGlobalUni("My Service Name");
notifyHandle = GCHandle.Alloc(notify);
unmanagedNotifyStructure = Marshal.AllocHGlobal((IntPtr)(notifyHandle));
NotifyServiceStatusChange(hService, (uint)0x00000001, ref unmanagedNotifyStructure);
Console.WriteLine("Waiting for the service to stop. Press enter to exit.");
Console.ReadLine();
}
}
}
public static void ReceivedStatusChangedEvent(IntPtr parameter)
{
Console.WriteLine("Service stopped.");
}
}
}
【问题讨论】：
-
你所说的“杀死”服务是什么意思，你的意思是杀死进程，如果是这样我认为服务控制器不会触发状态更改事件，你可以查看Windows事件日志确认
-
我的意思是停止服务。将其编辑到问题中。
-
@Alexandru，我更新了我的答案，现在可以使用了。