如何删除FileSystemWatcher对象的特定实例 [英] How to delete a particular instance of FileSystemWatcher object

问题描述

我有一个Windows应用程序，该应用程序使用FileSystemWatcher监视文件的更改.可以添加多个文件位置，并为每个位置创建FileSystemWatcher的新实例，并将该位置添加到列表框中.有一个选项可以从列表框中删除位置.删除位置时，我需要删除/处理FileSystemWatcher的特定实例.有什么办法可以做到这一点?预先感谢.

I have a windows application which uses FileSystemWatcher to monitor the change of files. Multiple file locations can be added and for each location a new instance of FileSystemWatcher is created and the location is added to a listbox. There is an option to delete a location from the listbox. I need to delete/dispose the particular instance of FileSystemWatcher when a location is deleted. Is there any way to attain this? Thanks in advance.

FileSystemWatcher fsw;

    private void CreateFWInstance(string strLoc)
    {
        if (strLoc != string.Empty)
        {
            fsw = new FileSystemWatcher();
            fsw.Changed += new FileSystemEventHandler(OnChanged);

            fsw.Path = strLoc;
            fsw.SynchronizingObject = this;

            fsw.EnableRaisingEvents = true;

        }
    }

推荐答案

好吧，您需要保留对该实例的引用，例如作为列表框条目中的 value ，或者是 Dictionary< string，FileSystemWatcher> 来从路径映射到观察者.然后，只需要处理观察者，并将其从字典中删除/删除列表项即可.

Well you'll need to keep a reference to the instance, e.g. as the value in the list box entry, or perhaps a Dictionary<string, FileSystemWatcher> to map from path to watcher. Then just dispose of the watcher and remove it from the dictionary / remove the list item.

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