如何对系统中的某个进程进行监控

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如何对系统中的某个进程进行监控

最近看到一篇文章，就是如何对系统某个进程进行监控，并且当这个进程触发某些事件的时候，能进行相应。而且发现有人问这方面的问题，我就大致在其原有的基础进行如下的修改。

首先说明的一点，方法是基于WMI的。以下是我扩展类的代码说明：

//------------------------ProcessInfo Class------------------------------------

//-----------------------------------------------------------------------------

//---File:clsProcessInfo.cs

//---Description:This class demonstrates the use of WMI.

// It provides a static method to query the list of running processes.

// And it provides two delegated events binding specific application.

//---Author:Knight

//---Date:Mar.21, 2006

//-----------------------------------------------------------------------------

//----------------------{ ProcessInfo Class }----------------------------------

using System;

using System.Data;

using System.Management;

using System.Diagnostics;

namespace WinProcess

{

///<summary>

/// ProcessInfo class.

///</summary>

public class ProcessInfo

{

// defenition of the delegates

public delegate void StartedEventHandler(object sender, EventArgs e);

public delegate void TerminatedEventHandler(object sender, EventArgs e);

// events to subscribe

public StartedEventHandler Started = null;

public TerminatedEventHandler Terminated = null;

// WMI event watcher

private ManagementEventWatcher watcher;

///<summary>

/// Construction that binds specific application with event declared

///</summary>

///<param name="LocalServerName"></param>

///<param name="appName"></param>

public ProcessInfo( string appName)

{

// querry every 2 seconds

string pol = "2";

string queryString =

"SELECT *" +

" FROM __InstanceOperationEvent " +

"WITHIN " + pol +

" WHERE TargetInstance ISA 'Win32_Process' " +

" AND TargetInstance.Name = '" + appName + "'";

string scope = @"//127.0.0.1/root/CIMV2";

// create the watcher and start to listen

watcher = new ManagementEventWatcher(scope, queryString);

watcher.EventArrived += new EventArrivedEventHandler(this.OnEventArrived);

watcher.Start();

}

///<summary>

/// Destruction function

///</summary>

public void Dispose()

{

watcher.Stop();

watcher.Dispose();

}

///<summary>

/// Get all processes that running in local machine

///</summary>

///<returns></returns>

public static DataTable RunningProcesses( )

{

// The second way of constructing a query

string queryString =

"SELECT Name, ProcessId, Caption, ExecutablePath" +

" FROM Win32_Process";

SelectQuery query = new SelectQuery(queryString);

ManagementScope scope = new ManagementScope( @"//127.0.0.1/root/CIMV2" );

ManagementObjectSearcher searcher = new ManagementObjectSearcher(scope, query);

ManagementObjectCollection processes = searcher.Get();

DataTable result = new DataTable();

result.Columns.Add("Name", Type.GetType("System.String"));

result.Columns.Add("ProcessId", Type.GetType("System.Int32"));

result.Columns.Add("Caption", Type.GetType("System.String"));

result.Columns.Add("Path", Type.GetType("System.String"));

foreach(ManagementObject mo in processes)

{

DataRow row = result.NewRow();

row["Name"] = mo["Name"].ToString();

row["ProcessId"] = Convert.ToInt32(mo["ProcessId"]);

if (mo["Caption"]!= null)

row["Caption"] = mo["Caption"].ToString();

if (mo["ExecutablePath"]!= null)

row["Path"] = mo["ExecutablePath"].ToString();

result.Rows.Add( row );

}

return result;

}

///<summary>

/// Get all processes that running in specific server

///</summary>

///<param name="sServerName"></param>

///<param name="sUserName"></param>

///<param name="sPassword"></param>

///<returns></returns>

public static DataTable RunningProcesses(

string sServerName,

string sUserName,

string sPassword )

{

// The second way of constructing a query

string queryString =

"SELECT Name, ProcessId, Caption, ExecutablePath" +

" FROM Win32_Process";

SelectQuery query = new SelectQuery(queryString);

//Set connection parameters

ConnectionOptions options = new ConnectionOptions();

options.Username = sUserName;

options.Password = sPassword;

//Create management scope

ManagementScope scope = new ManagementScope(

string.Format( @"//{0}/root/CIMV2", sServerName ),

options );

//To connect

try

{

scope.Connect();

}

catch( Exception err )

{

Debug.WriteLine( err.Message );

return null;

}

catch

{

return null;

}

ManagementObjectSearcher searcher = new ManagementObjectSearcher(scope, query);

ManagementObjectCollection processes = searcher.Get();

DataTable result = new DataTable();

result.Columns.Add("Name", Type.GetType("System.String"));

result.Columns.Add("ProcessId", Type.GetType("System.Int32"));

result.Columns.Add("Caption", Type.GetType("System.String"));

result.Columns.Add("Path", Type.GetType("System.String"));

foreach(ManagementObject mo in processes)

{

DataRow row = result.NewRow();

row["Name"] = mo["Name"].ToString();

row["ProcessId"] = Convert.ToInt32(mo["ProcessId"]);

if (mo["Caption"]!= null)

row["Caption"] = mo["Caption"].ToString();

if (mo["ExecutablePath"]!= null)

row["Path"] = mo["ExecutablePath"].ToString();

result.Rows.Add( row );

}

return result;

}

///<summary>

/// Event handle function

///</summary>

///<param name="sender"></param>

///<param name="e"></param>

private void OnEventArrived(object sender, System.Management.EventArrivedEventArgs e)

{

try

{

string eventName = e.NewEvent.ClassPath.ClassName;

Debug.WriteLine( eventName );

if (eventName.CompareTo("__InstanceCreationEvent")==0)

{

// Started

if (Started!=null)

Started(this, e);

}

else if (eventName.CompareTo("__InstanceDeletionEvent")==0)

{

// Terminated

if (Terminated!=null)

Terminated(this, e);

}

catch (Exception ex)

{

Debug.WriteLine(ex.Message);

}

大致类的说明如下：

1．两个静态方法，是获得系统中所有进程（一个是获得本地；另一个是获得某个指定的服务器）；

2． OnEventArrived，事件响应函数，当根据事件类型来进行传递；

类的使用大致如下：

1．获得本地系统中所有进程：

using WinProcess;

DataTable dt = ProcessInfo.RunningProcesses( );

dataGrid1.DataSource = dt;

2．获得某个指定系统中所有进程：

using WinProcess;

DataTable dt = ProcessInfo.RunningProcesses( Server, UserName, Psw );

dataGrid1.DataSource = dt;

3．监控某个程序并（以下是监控NotePad程序）：

using WinProcess;

private ProcessInfo notePad;

//In your form load event

notePad = new ProcessInfo("notepad.exe" );

notePad.Started += new ProcessInfo.StartedEventHandler(this.NotepadStarted);

notePad.Terminated += new ProcessInfo.TerminatedEventHandler (this.NotepadTerminated);

//Define your event handle

private void NotepadStarted(object sender, EventArgs e)

{

//Process start event

}

private void NotepadTerminated(object sender, EventArgs e)

{

//Process terminate event

}

本来，想修改构造函数，使之能适应捕获到远程系统某个程序的事件，但是很不幸的是，捕获到的信息只是错误信息，其原因就是事件无法通过RPC获得，所以不得不放弃。

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