c# - 参数异常(路径不是合法形式)

Question

背景信息:我正在使用在服务中实现的 FileSystemWatcher 类来监视文件中的更改。这是触发 onCreate 事件时抛出参数异常(路径不是合法形式)的编码部分。

FileMonitor.CS

public partial class FileMonitor:ServiceBase
{
 public FileSystemWatcher Watcher = new FileSystemWatcher();

    Private void FileWatcher()
    {
    FileActionHandler ActionHandler = new FileActionHandler();
    Watcher.Created += new FileSystemEventHandler(ActionHandler.onCreate);
    Watcher.Deleted += new FileSystemEventHandler(ActionHandler.onDelete);
    Watcher.Renamed += new RenamedEventHandler(ActionHandler.onRenamed);
    Watcher.EnableRaisingEvents = true;
    }
}

FileActionHandler.CS

 class FileActionHandler
 {
  FileMonitor FileMon = new FileMonitor();
  public void onCreate/onRename/onDelete(object source, FileSystemEventArgs e)
    {
      try
      {
       FileMon.Watcher.EnableRaisingEvents = false;
      }
      catch
      {
       /* Exception Code */
      }
      finally
      {
       FileMon.Watcher.EnableRaisingEvents = true;
      }
    }
  }

问题:谁能告诉我为什么会抛出异常以及如何解决它？

Answer 1

几周前我在做我的时遇到了同样的问题。我发现你需要在设置其他任何东西之前设置路径。因此，在您声明对象之后:

FileSystemWatcher watchfolder = new FileSystemWatcher();
watchfolder.Path = ConfigurationManager.AppSettings["MonitorPath"];

您可以在这里阅读更多内容: Create a file watcher service for windows

希望对你有帮助