C# 文件更改时通知？
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时间：2020-08-04 22:30:01 来源:igfitidea点击:
Notification when a file changes?
提问by PaulB
Is there some mechanism by which I can be notified (in C#) when a file is modified on the disc?
当磁盘上的文件被修改时，是否有某种机制可以通知我（在 C# 中）？
采纳答案by Mihai Limb??an
That would be System.IO.FileSystemWatcher.
回答by Shea
Use the FileSystemWatcher. You can filter for modification events only.
使用FileSystemWatcher. 您只能过滤修改事件。
回答by Dirk Vollmar
You can use the FileSystemWatcherclass.
您可以使用FileSystemWatcher该类。
public 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);
}
