C# Windows 服务：OnStart 循环 - 我需要委托吗？
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Windows Services: OnStart loop - do I need to delegate?
提问by Rob Stevenson-Leggett
I've got a windows service which scans a folder every n seconds for changes. I'm getting "the service did not respond to the start command in a timely fashion" when trying to start it up.
我有一个 Windows 服务，它每 n 秒扫描一个文件夹以进行更改。尝试启动时，我收到“服务没有及时响应启动命令”的消息。
I've got a loop setting off in OnStart like so:
我在 OnStart 中设置了一个循环，如下所示：
public void OnStart(string[] args)
{
while (!_shouldExit)
{
//Do Stuff
//Repeat
Thread.Sleep(_scanIntervalMillis);
}
}
Is this what is causing the error? Should I delegate this method?
这是导致错误的原因吗？我应该委托这个方法吗？
采纳答案by Marc Gravell
OnStart should only startthe work; it isn't responsible for doing it. This typically means spawning a new thread to do the actual work. It is expected that OnStart completes promptly. For example:
OnStart 应该只开始工作；它不负责这样做。这通常意味着产生一个新线程来完成实际工作。预计 OnStart 会迅速完成。例如：
public void OnStart(string[] args) // should this be override?
{
var worker = new Thread(DoWork);
worker.Name = "MyWorker";
worker.IsBackground = false;
worker.Start();
}
void DoWork()
{
// do long-running stuff
}
回答by Darin Dimitrov
The OnStart method shouldn't block. You need to spawn a worker thread that will do the job. You could also take a look at the FileSystemWatcherclass to scan for file system change notifications.
OnStart 方法不应阻塞。您需要生成一个工作线程来完成这项工作。您还可以查看FileSystemWatcher类以扫描文件系统更改通知。
