Question

这适用于我之前提出的问题。我一直在尝试创建一个应用程序，它允许我监视文件并在文件停止更改时提醒我。有人建议只检查文件大小并在Windows服务中使用计时器。我已经接受了他们的建议，但我对Windows服务并不是很了解。我正在尝试在我创建的两个文件之间进行文件比较。以下是代码

public partial class Service1 : ServiceBase
{
    Timer timer1 = new Timer();
    string filePath = @"C:\Users\Test\Desktop\New folder\Test.txt";
    string logPath = @"C:\Users\Test\Desktop\New folder\Log.txt";
    string newLog = @"C:\Users\Test\Desktop\New folder\Log1.txt";


    public Service1()
    {
        InitializeComponent();
    }

    public void OnStart(string[] args)
    {            
        timer1.Elapsed += new ElapsedEventHandler(timer1_Elapsed);
        timer1.Interval = 60000;
        timer1.Enabled = true;
        timer1.AutoReset = true;
        timer1.Start();

        FileInfo f = new FileInfo(filePath);
        long s1 = f.Length;

        using (StreamWriter file = new StreamWriter(logPath))
        {
            file.WriteLine(s1.ToString());
        }
    }

    protected override void OnStop()
    {
        timer1.Enabled = false;
    }

    public void timer1_Elapsed(object sender, ElapsedEventArgs e)
    {
        FileInfo f = new FileInfo(filePath);
        long s2 = f.Length;

        using (StreamWriter file = new StreamWriter(newLog))
        {
            file.WriteLine(s2.ToString());
        }
    }
}

我无法弄清楚如何在timer_elapsed方法中引用s1。我尝试在全球范围内声明它，但它不起作用。我希望能够在timer elapsed方法中做这样的事情。

        if (s1 == s2)
        {
            //send email
        }

        else
        {
            //don't do anything
        }

非常感谢任何建议。

Answer 1

您需要FileSystemWatcher类。有NotifyFilter / Path / IncludeSubdirectories的设置。

此外，这个类为Changed，Created，Deleted，Renamed引发了一系列事件。

http://msdn.microsoft.com/en-us/library/system.io.filesystemwatcher.aspx

Answer 2

就这样做：

public partial class Service1 : ServiceBase
{
    Timer timer1 = new Timer();
    string filePath = @"C:\Users\Test\Desktop\New folder\Test.txt";
    string logPath = @"C:\Users\Test\Desktop\New folder\Log.txt";
    string newLog = @"C:\Users\Test\Desktop\New folder\Log1.txt";
    long oldFileSize; // Add this line

    public void OnStart(string[] args)
    {            
        timer1.Elapsed += new ElapsedEventHandler(timer1_Elapsed);
        timer1.Interval = 60000;
        timer1.Enabled = true;
        timer1.AutoReset = true;
        timer1.Start();

        FileInfo f = new FileInfo(filePath);
        oldFileSize = f.Length; // change this line

        using (StreamWriter file = new StreamWriter(logPath))
        {
            file.WriteLine(s1.ToString());
        }
    }

    public void timer1_Elapsed(object sender, ElapsedEventArgs e)
    {
        FileInfo f = new FileInfo(filePath);
        long s2 = f.Length;

        using (StreamWriter file = new StreamWriter(newLog))
        {
            if (s2 == oldFileSize)
            {
                // Send Email
            }
            file.WriteLine(s2.ToString());
        }
    }

C＃文件监控

2 个答案: