电子商务网站建设pdf,做网站的策划方案,网络维护技术,济南建网站哪家好咨询区 PaulB#xff1a;请问在 C# 中如何实现当一个磁盘文件的变更#xff0c;让我的程序马上能感知到#xff1f;回答区 Dirk Vollmar#xff1a;在 C# 中有一个 FileSystemWatcher 类#xff0c;它专门用来做文件的变更感知#xff0c;大概有如下四类通知事件#xf… 咨询区 PaulB请问在 C# 中如何实现当一个磁盘文件的变更让我的程序马上能感知到回答区 Dirk Vollmar在 C# 中有一个 FileSystemWatcher 类它专门用来做文件的变更感知大概有如下四类通知事件Changed文件内容变更通知参考连接http://msdn.microsoft.com/en-us/library/system.io.filesystemwatcher.changed.aspxCreated文件创建变更通知参考连接http://msdn.microsoft.com/en-us/library/system.io.filesystemwatcher.created.aspxDeleted文件删除变更通知参考连接https://docs.microsoft.com/en-us/dotnet/api/system.io.filesystemwatcher.deleted?redirectedfromMSDNviewnet-5.0Renamed文件重命令通知参考连接http://msdn.microsoft.com/en-us/library/system.io.filesystemwatcher.renamed.aspx下面的代码就是用来监控 D:\test 目录下的所有 txt 文件。class Program{static void Main(string[] args){CreateFileWatcher(D:\test);Console.ReadLine();}public static void CreateFileWatcher(string path){// Create a new FileSystemWatcher and set its properties.FileSystemWatcher watcher new FileSystemWatcher();watcher.Path path;/* Watch for changes in LastAccess and LastWrite times, and the renaming of files or directories. */watcher.NotifyFilter NotifyFilters.LastAccess | NotifyFilters.LastWrite| NotifyFilters.FileName | NotifyFilters.DirectoryName;// Only watch text files.watcher.Filter *.txt;// Add event handlers.watcher.Changed new FileSystemEventHandler(OnChanged);watcher.Created new FileSystemEventHandler(OnChanged);watcher.Deleted new FileSystemEventHandler(OnChanged);watcher.Renamed new RenamedEventHandler(OnRenamed);// Begin watching.watcher.EnableRaisingEvents true;}// Define the event handlers.private static void OnChanged(object source, FileSystemEventArgs e){// Specify what is done when a file is changed, created, or deleted.Console.WriteLine(File: e.FullPath e.ChangeType);}private static void OnRenamed(object source, RenamedEventArgs e){// Specify what is done when a file is renamed.Console.WriteLine(File: {0} renamed to {1}, e.OldFullPath, e.FullPath);}}当然如何你想监控 D:\test 下包括子目录的 txt 文件可以配置 IncludeSubdirectories 属性参考如下代码watcher.IncludeSubdirectories true;点评区 FileSystemWatcher 非常强大在 .NETCore 中实现对 appsettings 的监控用的就是它作为底层实现。
