FileSystemWatcher 监控文件变化

我不是女神ヾ 2023-06-30 06:48 115阅读 0赞

本文测试了FileSystemWatcher 类监控文件变化。

using System;
    using System.Security.Permissions;
    using System.IO;
    
    namespace ConsoleApp1
    {
        public class FileStateWatcher
        {    
            [PermissionSet(SecurityAction.Demand, Name = "FullTrust")]
            public static int Run()
            {
                FileSystemWatcher fsWatcher = new FileSystemWatcher();
                fsWatcher.Path = "E:\\Test";
    
                fsWatcher.NotifyFilter = NotifyFilters.LastAccess |    //上一次打开的日期。 
                                         NotifyFilters.LastWrite |     //上一次写入内容的日期
                                         NotifyFilters.FileName |      //文件名
                                         NotifyFilters.DirectoryName | //目录名
                                         NotifyFilters.Size;           //大小
    
                //监听子目录
                fsWatcher.IncludeSubdirectories = true;
                //监听文件类型
                fsWatcher.Filter = "*.txt";
    
                //添加事件处理
                fsWatcher.Changed += new FileSystemEventHandler(OnChanged);
                fsWatcher.Created += new FileSystemEventHandler(OnCreated);
                fsWatcher.Deleted += new FileSystemEventHandler(OnDeleted);
                fsWatcher.Renamed += new RenamedEventHandler(OnRenamed);
    
                fsWatcher.EnableRaisingEvents = true;       
                return 0;
            }
            //修改时的处理
            private static void OnChanged(Object source, FileSystemEventArgs e)
            {
                Console.WriteLine("File: {0} {1}", e.FullPath, e.ChangeType);
            }
            //重命名时的处理
            private static void OnRenamed(Object source, FileSystemEventArgs e)
            {
                Console.WriteLine("File: {0} {1}", e.FullPath, e.ChangeType);
            }
            //删除时的处理
            private static void OnDeleted(object source, FileSystemEventArgs e)
            {
                Console.WriteLine("File: {0} {1}", e.FullPath, e.ChangeType);
            }
            //创建时的处理
            private static void OnCreated(object source, FileSystemEventArgs e)
            {
                Console.WriteLine("File: {0} {1}", e.FullPath, e.ChangeType);
            }
        };
    
        class Program
        {
            static void Main(string[] args)
            {
                FileStateWatcher.Run();
                // 输入q结束程序
                Console.WriteLine("Press q to quit the sample.");
                while (Console.Read() != 'q') ;
            }
        }
    }

上例中监控的目录是“E:\\\\Test”，在此目录下创建txt文件，命名为“log.txt”

![20200115154105989.png][]

运行结果：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpeWF6aGVuMjAxMQ_size_16_color_FFFFFF_t_70][]

本例仅仅打印了发生变化的文件名及变化类型。

[20200115154105989.png]: https://img-blog.csdnimg.cn/20200115154105989.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpeWF6aGVuMjAxMQ_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20200115154227831.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpeWF6aGVuMjAxMQ==,size_16,color_FFFFFF,t_70