Question

我的程序需要监控多个位置，但每个位置都会触发相同的代码。由于单个FileSystemWatcher无法监控多个位置，但是是否可以为其创建多个实例并为每个位置传递一个文件夹路径？

我无法对每个FileSystemWatcher进行硬编码，因为需要及时添加越来越多的位置，这需要由最终用户完成，因为对我来说这是非常不切实际的。每次手动硬编码新的FileSystemWatcher。所以我的计划是将文件夹路径保存到文件中，程序只为列表中的每个路径创建一个FileSystemWatcher。但我不知道这是否有可能是最轻微的。

在此处进行工厂方法模式建议尝试：我收到了错误：＆＃34;＆＃39;列表＆＃39;不包含＆＃39;添加＆＃39;

的定义

public void StartWatchers()
    {
        string[] ArrayPaths = new string[2];
        List<FileSystemWatcher> watchers = new List<FileSystemWatcher>();
        ArrayPaths[0] = @"K:\Daily Record Checker\Test\Test1";
        ArrayPaths[1] = @"K:\Daily Record Checker\Test\Test2";

        int i = 0;
        foreach (String String in ArrayPaths)
        {
            watcher.add(MyWatcherFatory(ArrayPaths[i]));
            i++;
        }
        //Do other stuff....
        //....
        //Start my watchers...
        foreach (FileSystemWatcher watcher in watchers)
        {
            Watcher.EnableRaisingEvents = true;
            i++;
        }

    }

    FileSystemWatcher MyWatcherFatory(string path)
    {
        FileSystemWatcher watcher = new FileSystemWatcher(path);
        watcher.Changed += Watcher_Created;
        watcher.Path = path;
        watcher.Filter = "*.csv";
        return watcher;
    }

    private void Watcher_Created(object sender, FileSystemEventArgs e)
    {
        System.Threading.Thread.Sleep(1000);
        FileInfo fileInfo = new FileInfo(e.FullPath);
        if (!IsFileLocked(fileInfo))
        {
            CheckNumberOfRecordsInFile(e.FullPath);
        }          
    }

Answer 1

使用factory method pattern。

    FileSystemWatcher MyWatcherFatory(string path, object additionalParameters)
    {
        FileSystemWatcher watcher = new FileSystemWatcher(path);
        watcher.Changed += myWatcherChangedMethod;//Attach them to the same listeners,,,
        //Set additional parameters...
        return watcher.
    }

编辑：根据您提供的信息：

    public void StartWatchers()
    {
        string[] ArrayPaths = new string[2];
        List<FileSystemWatcher> watchers = new List<FileSystemWatcher>();
        ArrayPaths[0] = @"K:\Daily Record Checker\Test\Test1";
        ArrayPaths[1] = @"K:\Daily Record Checker\Test\Test2";

        int i = 0;
        foreach (String String in ArrayPaths)
        {
            watcher.add(MyWatcherFatory(ArrayPaths[i]));
            i++;
        }
        //Do other stuff....
        //....
        //Start my watchers...
        foreach (FileSystemWatcher watcherin watchers )
        {
            watcher.EnableRaisingEvents = true;;
            i++;
        }

    }

    FileSystemWatcher MyWatcherFatory(string path)
    {
        FileSystemWatcher watcher = new FileSystemWatcher(path);
        watcher.Changed += Watcher_Created;
        watcher.Path = path;
        watcher.Filter = "*.csv";
        return watcher;
    }

    private void Watcher_Created(object sender, FileSystemEventArgs e)
    {
        System.Threading.Thread.Sleep(1000);
        FileInfo fileInfo = new FileInfo(e.FullPath);
        if (!IsFileLocked(fileInfo))
        {
            CheckNumberOfRecordsInFile(e.FullPath);
        }          
    }

创建同一FileSystemWatcher的多个实例

1 个答案: