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有沒有辦法在.net中保持文件夾的更改跟蹤?例如,如果一個文件添加到文件夾我的應用程序中的一些代碼去運行?像觸發器,但Windows窗體應用程序?使用vb.net或C#更改對文件夾的跟蹤
有沒有辦法在.net中保持文件夾的更改跟蹤?例如,如果一個文件添加到文件夾我的應用程序中的一些代碼去運行?像觸發器,但Windows窗體應用程序?使用vb.net或C#更改對文件夾的跟蹤
聽起來像你在描述FileSystemWatcher類。它監視文件系統,並在事情發生變化時引發事件,允許您在事件處理程序中運行代碼以處理所需的文件/文件夾更改。
有使用鏈接的MSDN頁面上的例子,在這裏它是(在不太可能發生的鏈路出現陳舊):
using System;
using System.IO;
using System.Security.Permissions;
public class Watcher
{
public static void Main()
{
Run();
}
[PermissionSet(SecurityAction.Demand, Name="FullTrust")]
public static void Run()
{
string[] args = System.Environment.GetCommandLineArgs();
// If a directory is not specified, exit program.
if(args.Length != 2)
{
// Display the proper way to call the program.
Console.WriteLine("Usage: Watcher.exe (directory)");
return;
}
// Create a new FileSystemWatcher and set its properties.
FileSystemWatcher watcher = new FileSystemWatcher();
watcher.Path = args[1];
/* 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;
// Wait for the user to quit the program.
Console.WriteLine("Press \'q\' to quit the sample.");
while(Console.Read()!='q');
}
// 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);
}
}
謝謝,那幫助我。 –
好,通常MSDN是一個很好的起點...... –