具体代码如下：
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#using <System.dll>
#include <iostream>
using namespace std;
using namespace System;
using namespace System::IO;
using namespace System::Security::Permissions;
public ref class Watcher
{
private:
// Define the event handlers.
static void OnChanged( Object^ /*source*/, FileSystemEventArgs^ e )
{
// Specify what is done when a file is changed, created, or deleted.
Console::WriteLine( "File: {0} {1}", e->FullPath, e->ChangeType );
}
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 );
}
public:
[PermissionSet(SecurityAction::Demand, Name="FullTrust")]
int static run()
{
//array<String^>^args = System::Environment::GetCommandLineArgs();
//创建一个FileSystemWatcher并设置它的属性.
FileSystemWatcher^ fsWatcher = gcnew FileSystemWatcher( );
fsWatcher->Path = "C:\\files";
/* Watch for changes in LastAccess and LastWrite times, and
the renaming of files or directories. */
fsWatcher->NotifyFilter = static_cast<NotifyFilters>(//监听文件的以下属性 按需求添加 这里我添加了一些常用的
NotifyFilters::LastAccess | //文件或文件夹上一次打开的日期。
NotifyFilters::LastWrite | //上一次向文件或文件夹写入内容的日期
NotifyFilters::FileName | //文件名
NotifyFilters::DirectoryName | //目录名
NotifyFilters::Size); //大小
//监听子目录
fsWatcher->IncludeSubdirectories = true;
// Only watch text files.
//fsWatcher->Filter = "*.txt";
// Add event handlers.
fsWatcher->Changed += gcnew FileSystemEventHandler( Watcher::OnChanged );
fsWatcher->Created += gcnew FileSystemEventHandler( Watcher::OnChanged );
fsWatcher->Deleted += gcnew FileSystemEventHandler( Watcher::OnChanged );
fsWatcher->Renamed += gcnew RenamedEventHandler( Watcher::OnRenamed );
// Begin watching.
fsWatcher->EnableRaisingEvents = true;
// Wait for the user to quit the program.
Console::WriteLine( "Press \'q\' to quit the sample." );
while ( Console::Read() != 'q' );
return 0;
}
};
int main() {
Watcher::run();
}
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过程 1.首先创建FileSystemWatcher 对象 用来设置一些属性以及添加监听事件
2.设置监听目录
3.设置监听文件的属性
4.设置监听子目录
5.添加监听事件
6.开始监听
上面的sample代码可以在MSDN上找到，如果有不确定的地方，可以查看文档