有没有办法注册一个事件,当特定文件名的可执行文件启动时触发?我知道很容易通过获取进程句柄并注册退出事件来获得进程退出事件。但是如何在进程尚未运行时通知您当一个进程启动时...而不必轮询所有正在运行的进程呢?
You could use the following:
private ManagementEventWatcher WatchForProcessStart(string processName)
{
string queryString =
"SELECT TargetInstance" +
" FROM __InstanceCreationEvent " +
"WITHIN 10 " +
" WHERE TargetInstance ISA 'Win32_Process' " +
" AND TargetInstance.Name = '" + processName + "'";
// The dot in the scope means use the current machine
string scope = @"\\.\root\CIMV2";
// Create a watcher and listen for events
ManagementEventWatcher watcher = new ManagementEventWatcher(scope, queryString);
watcher.EventArrived += ProcessStarted;
watcher.Start();
return watcher;
}
private ManagementEventWatcher WatchForProcessEnd(string processName)
{
string queryString =
"SELECT TargetInstance" +
" FROM __InstanceDeletionEvent " +
"WITHIN 10 " +
" WHERE TargetInstance ISA 'Win32_Process' " +
" AND TargetInstance.Name = '" + processName + "'";
// The dot in the scope means use the current machine
string scope = @"\\.\root\CIMV2";
// Create a watcher and listen for events
ManagementEventWatcher watcher = new ManagementEventWatcher(scope, queryString);
watcher.EventArrived += ProcessEnded;
watcher.Start();
return watcher;
}
private void ProcessEnded(object sender, EventArrivedEventArgs e)
{
ManagementBaseObject targetInstance = (ManagementBaseObject) e.NewEvent.Properties["TargetInstance"].Value;
string processName = targetInstance.Properties["Name"].Value.ToString();
Console.WriteLine(String.Format("{0} process ended", processName));
}
private void ProcessStarted(object sender, EventArrivedEventArgs e)
{
ManagementBaseObject targetInstance = (ManagementBaseObject)e.NewEvent.Properties["TargetInstance"].Value;
string processName = targetInstance.Properties["Name"].Value.ToString();
Console.WriteLine(String.Format("{0} process started", processName));
}
你可以调用WatchForProcessStart和/或WatchForProcessEnd方法,传入进程名称(例如“notepad.exe”)。
两个Watch*方法返回ManagementEventWatcher对象,因为它实现了IDisposable接口,所以当你使用完后应该调用Dispose方法释放资源,以防出现问题。
如果需要在进程启动后更快地触发事件,你还可以更改查询中的轮询值。要执行此操作,请将“WITHIN 10”行更改为小于10的数字。
这里是代码。
请注意,您需要以管理员身份启动Visual Studio才能执行此代码。
using System;
using System.Management;
namespace AppLaunchDetector
{
class Program
{
static void Main(string[] args)
{
ManagementEventWatcher w = null;
WqlEventQuery q;
try
{
q = new WqlEventQuery();
q.EventClassName = "Win32_ProcessStartTrace";
w = new ManagementEventWatcher(q);
w.EventArrived += new EventArrivedEventHandler(ProcessStartEventArrived);
w.Start();
Console.ReadLine(); // block main thread for test purposes
}
catch (Exception ex)
{
}
finally
{
w.Stop();
}
}
static void ProcessStartEventArrived(object sender, EventArrivedEventArgs e)
{
foreach (PropertyData pd in e.NewEvent.Properties)
{
Console.WriteLine("\n============================= =========");
Console.WriteLine("{0},{1},{2}", pd.Name, pd.Type, pd.Value);
}
}
}
}
WMI 可以在进程创建时创建事件。然后,您可以过滤这些事件。
"SELECT TargetInstance.Name FROM __InstanceCreationEvent WITHIN 10 WHERE TargetInstance ISA 'Win32_Process' ";
- Clive