c# watcher怎样记录监控日志

在C#中，你可以使用System.IO.File和System.Diagnostics.EventLog类来记录监控日志。以下是一个简单的示例，展示了如何创建一个文件监视器来记录日志：

using System; using System.IO; using System.Text; using System.Threading.Tasks; using System.Diagnostics;  namespace Watcher {     class Program     {         static void Main(string[] args)         {             string folderPath = @"C:\path\to\folder";             string logFileName = "watcher.log";             string logFilePath = Path.Combine(folderPath, logFileName);              // 确保日志文件存在             if (!File.Exists(logFilePath))             {                 File.Create(logFilePath);             }              // 创建一个监视器来监视文件夹中的文件更改             FileSystemWatcher watcher = new FileSystemWatcher(folderPath);              // 定义要监视的事件类型             watcher.NotifyFilter = NotifyFilters.LastAccess | NotifyFilters.LastWrite                                   | NotifyFilters.FileName | NotifyFilters.DirectoryName;              // 注册事件处理程序             watcher.Changed += Watcher_Changed;             watcher.Created += Watcher_Created;             watcher.Deleted += Watcher_Deleted;             watcher.Renamed += Watcher_Renamed;              // 开始监视             watcher.EnableRaisingEvents = true;              Console.WriteLine("开始监视文件夹: " + folderPath);             Console.WriteLine("日志文件: " + logFilePath);              // 等待用户按下任意键退出             Console.ReadKey();              // 停止监视并注销事件处理程序             watcher.EnableRaisingEvents = false;             watcher.Changed -= Watcher_Changed;             watcher.Created -= Watcher_Created;             watcher.Deleted -= Watcher_Deleted;             watcher.Renamed -= Watcher_Renamed;              Console.WriteLine("监视已停止");         }          private static void Watcher_Changed(object source, FileSystemEventArgs e)         {             LogEvent("文件已更改: " + e.FullPath);         }          private static void Watcher_Created(object source, FileSystemEventArgs e)         {             LogEvent("文件已创建: " + e.FullPath);         }          private static void Watcher_Deleted(object source, FileSystemEventArgs e)         {             LogEvent("文件已删除: " + e.FullPath);         }          private static void Watcher_Renamed(object source, RenamedEventArgs e)         {             LogEvent("文件已重命名: " + e.OldFullPath + " -> " + e.FullPath);         }          private static void LogEvent(string message)         {             // 获取当前时间             DateTime now = DateTime.Now;              // 创建日志条目             StringBuilder logEntry = new StringBuilder();             logEntry.AppendLine($"{now}: {message}");              // 将日志条目追加到日志文件中             File.AppendAllText(logFilePath, logEntry.ToString());              // 可选: 将日志条目写入事件日志             // EventLog.WriteEntry(logFilePath, message, EventLogEntryType.Information);         }     } } 

这个示例将监视指定的文件夹，并在文件更改时记录日志。你可以根据需要修改folderPath和logFileName变量来指定要监视的文件夹和日志文件的路径。