Foe hobbie或者练习我正在开发一个(非常)简单的流程监视器,它暴露两个事件以限制进程启动并通过两个ManagementEventWatcher
对象停止进程。
使用ManagementEventWatcher
对象使用对Win32_ProcessStartTrace
和Win32_ProcessStopTrace
类的查询,我会依赖于处理启动和停止发现,然后我引发相应的EventArrivedEventHandler
事件以显示已经开始或停止的过程,以面向事件的方式。
问题是我想获取其他(基本)信息,例如已启动或停止的进程的可执行路径和PID,但Win32_ProcessStartTrace
和Win32_ProcessStopTrace
类不揭露那个信息/财产。
另一方面,他们公开了一个ProcessName
属性,在文档中说明了这一点:
您可以使用此名称来获取Win32_Process的实例 同样的过程。
然而,MSDN如何期望我能够有效地做到这一点,同时考虑到同一个文件名的各种进程可以同时运行?
如果这些类提供给我的唯一有用的信息是进程名称和父PID,那么在效率方面,MSDN期望我可以做什么来匹配目标进程我想获得进行WMI查询的其他信息Win32_Process
类当它可以存在具有相同名称并由同一进程创建的各种进程时,什么都没有,所以......我现在非常困难。
我认为执行高效的Win32_Process
查询更为一致,例如进程的 PID (不是父PID)。
在C#或VB.Net中,并且在效率方面(因为为了避免我上面解释的内容),在EventArrivedEventHandler
到达之后我可以做些什么来获得正确过程的其他信息?
我的期望是获得一些像PID这样的唯一标识符,然后我可以对Win32_Process
类执行WMI查询以获取我想要的所有其他信息,而不仅仅是进程名称和父PID。
这是代码的相关部分:
Public Class ProcessWatcher : Implements IDisposable
Private WithEvents processStartWatcher As ManagementEventWatcher
Private WithEvents processStopWatcher As ManagementEventWatcher
''' <summary>
''' Occurs when a process starts (run).
''' </summary>
Public Event ProcessStarted As EventArrivedEventHandler
''' <summary>
''' Occurs when a process stops (exit).
''' </summary>
Public Event ProcessStopped As EventArrivedEventHandler
Public Sub New()
Me.processStartWatcher = New ManagementEventWatcher(New WqlEventQuery("SELECT * FROM Win32_ProcessStartTrace"))
Me.processStopWatcher = New ManagementEventWatcher(New WqlEventQuery("SELECT * FROM Win32_ProcessStopTrace"))
End Sub
''' <summary>
''' Start monitoring for process starts and stops.
''' </summary>
<DebuggerStepThrough>
Public Sub Start()
Me.processStartWatcher.Start()
Me.processStopWatcher.Start()
End Sub
''' <summary>
''' Stop monitoring for process starts and stops.
''' </summary>
<DebuggerStepThrough>
Public Sub [Stop]()
Me.processStartWatcher.Stop()
Me.processStopWatcher.Stop()
End Sub
Protected Overridable Sub RaiseProcessStartedEvent(ByVal e As EventArrivedEventArgs)
RaiseEvent ProcessStarted(Me, e)
End Sub
Protected Overridable Sub RaiseProcessStoppedEvent(ByVal e As EventArrivedEventArgs)
RaiseEvent ProcessStopped(Me, e)
End Sub
Private Sub ProcessStartWatcher_EventArrived(ByVal sender As Object, ByVal e As EventArrivedEventArgs) _
Handles processStartWatcher.EventArrived
If (Me.ProcessStartedEvent IsNot Nothing) Then
Me.RaiseProcessStartedEvent(e)
End If
End Sub
Private Sub ProcessStopWatcher_EventArrived(ByVal sender As Object, ByVal e As EventArrivedEventArgs) _
Handles processStopWatcher.EventArrived
If (Me.ProcessStoppedEvent IsNot Nothing) Then
Me.RaiseProcessStoppedEvent(e)
End If
End Sub
End Class
一个用法示例:
Imports System.Management
Public Class Form1 : Inherits Form
Private WithEvents processWatcher As New ProcessWatcher
Private Sub Form1_Load(ByVal sender As Object, ByVal e As EventArgs) _
Handles MyBase.Load
Me.processWatcher.Start()
End Sub
Private Sub ProcessWatcher_ProcessStarted(ByVal sender As Object, ByVal e As EventArrivedEventArgs) _
Handles processWatcher.ProcessStarted
Console.WriteLine(String.Format("Process started | Name: {0}", e.NewEvent.Properties("ProcessName").Value))
Console.WriteLine(String.Format("Process started | PPid: {0}", e.NewEvent.SystemProperties("ParentProcessID").Value))
End Sub
Private Sub Form1_FormClosing(ByVal sender As Object, ByVal e As FormClosingEventArgs) _
Handles MyBase.FormClosing
Me.processWatcher.Stop()
End Sub
End Class
答案 0 :(得分:2)
虽然文档没有讨论它,但Win32_ProcessStopTrace和Win32_ProcessStartTrace确实存在'ProcessID'属性,因为这两个类派生自Win32_ProcessTrace,它具有它。您可以使用WMIExplorer:
等工具进行检查