我正在编写一个可以检查文本文件是否更改的应用程序。如果是，它会重新启动 Windows 服务。
我正在为它使用 FileSystemWatcher，它看起来像它生成的事件很少。这是我的代码：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.ServiceProcess;
using System.Threading;
namespace ConsoleApplication1
{
class FileMon
{
public static bool status;
public static void Run()
{
try
{
FileSystemWatcher watcher = new FileSystemWatcher();
watcher.Path = @"D:\test\";
watcher.Filter = "*.txt";
watcher.NotifyFilter = NotifyFilters.LastWrite;
watcher.Changed += new FileSystemEventHandler(watcher_Changed);
watcher.EnableRaisingEvents = true;
Console.WriteLine(status);
while (Console.Read() != 'q') ;
}
catch (Exception e)
{
Console.WriteLine(e);
}
}
static void watcher_Changed(object sender, FileSystemEventArgs e)
{
Console.WriteLine(e.ChangeType);
// status = true;
Console.WriteLine(status);
Console.WriteLine("File: " + e.FullPath + " " + e.ChangeType);
Console.WriteLine("before IF block status = {0} ", status);
if (status == false)
{
RestartService();
status = true;
Console.WriteLine("after IF block status = {0} ", status);
}
else
{
}
}
public static void RestartService()
{
ServiceController service = new ServiceController("6to4");
try
{
int millisec1 = Environment.TickCount;
TimeSpan timeout = TimeSpan.FromMilliseconds(50);
Console.WriteLine("trying to stop");
service.Stop();
service.WaitForStatus(ServiceControllerStatus.Stopped, timeout);
// Console.ReadKey();
Console.WriteLine("stoping.........");
// count the rest of the timeout
// int millisec2 = Environment.TickCount;
// timeout = TimeSpan.FromMilliseconds(50 - (millisec2 - millisec1));
Console.WriteLine("dd");
// Console.ReadKey();
service.Start();
service.WaitForStatus(ServiceControllerStatus.Running, timeout);
}
catch
{
// ...
}
}
}
}
当我运行它并在文本编辑器中更改文本文件时，我得到下一个输出：
False
Changed
False
File: D:\test\1.txt Changed
before IF block status = False
trying to stop
after IF block status = True
Changed
True
File: D:\test\1.txt Changed
before IF block status = True
Changed
True
File: D:\test\1.txt Changed
before IF block status = True
看起来某处有错误，这就是为什么在单次更改后我看到的不是一个，而是三个输出副本。而且我不明白出了什么问题以及我在哪里做错了......