c# WMI 使 用 技 巧

源文来自地址： 见贤思齐

 

c# WMI 使 用 技 巧

2008-07-17 14:39

WMI使用技巧

        很多的朋友对WMI可能见过但理解不深，我也是十分想了解关于WMI的知识，可一直找不对太合适的资料，在网上的一些资料不是有很多错误，就是讲解不清，我有空的时候将关于WMI的知识集中一下，放在这里便于大家学习。本贴会不断增加。

1、 什么是WMI

WMI是英文Windows Management Instrumentation的简写，它的功能主要是：访问本地主机的一些信息和服务，可以管理远程计算机（当然你必须要拥有足够的权限），比如：重启，关机，关闭进程，创建进程等。

2、 如何用WMI获得本地磁盘的信息？

首先要在VS.NET中创建一个项目，然后在添加引用中引用一个.net的装配件：

System.Management.dll,这样你的项目才能使用WMI。代码如下：

using System;
using System.Management;
class Sample_ManagementObject
{
public static int Main(string[] args)
{
   SelectQuery query=new SelectQuery("Select * From Win32_LogicalDisk");
   ManagementObjectSearcher searcher=new ManagementObjectSearcher(query);
   foreach(ManagementBaseObject disk in searcher.Get())
   {
    Console.WriteLine("/r/n"+disk["Name"] +" "+disk["DriveType"] + " " + disk["VolumeName"]);
   }
   Console.ReadLine();

   return 0;

}

}

disk["DriveType"] 的返回值意义如下:

1 No type
2 Floppy disk
3 Hard disk
4 Removable drive or network drive
5 CD-ROM
6 RAM disk

3、如何用WMI获得指定磁盘的容量？

using System;
using System.Management;

// This example demonstrates reading a property of a ManagementObject.
class Sample_ManagementObject
{
public static int Main(string[] args)
{
   ManagementObject disk = new ManagementObject(
    "win32_logicaldisk.deviceid=/"c:/"");
   disk.Get();
   Console.WriteLine("Logical Disk Size = " + disk["Size"] + " bytes");
   Console.ReadLine();
   return 0;
}
}

4、 如何列出机器中所有的共享资源？

using System;
using System.Management;

class TestApp {
[STAThread]
static void Main()
{
   ManagementObjectSearcher searcher = new ManagementObjectSearcher(
    "SELECT * FROM Win32_share");
   foreach (ManagementObject share in searcher.Get())
   {
    Console.WriteLine(share.GetText(TextFormat.Mof));
   }
}
}
别忘记在引用中把System.Management添加进来。

5、 怎样写程控制让系统中的某个文件夹共享或取消共享.？

首先，这需要以有相应权限的用户登录系统才行。然后，试试下面的代码：

using System;
using System.Management;

class CreateShare
{
public static void Main(string[] args)
{
   ManagementClass _class = new ManagementClass(new ManagementPath("Win32_Share"));

   object[] obj = {"C://Temp","我的共享",0,10,"Dot Net 实现的共享",""};

   _class.InvokeMethod("create",obj);
}
}
将

object[] obj = {"C://Temp","我的共享",0,10,"Dot Net 实现的共享",""};

改为

object[] obj = {"C://Temp","我的共享",0,null,"Dot Net 实现的共享",""};

就可以实现授权给最多用户了。

6、 如何获得系统服务的运行状态？

private void getServices()
{
ManagementObjectCollection queryCollection;
string[] lvData =   new string[4];
try
{
   queryCollection = getServiceCollection("SELECT * FROM Win32_Service");
   foreach ( ManagementObject mo in queryCollection)
   {
    //create child node for operating system
    lvData[0] = mo["Name"].ToString();
    lvData[1] = mo["StartMode"].ToString();
    if (mo["Started"].Equals(true))
     lvData[2] = "Started";
    else
     lvData[2] = "Stop";
     lvData[3] = mo["StartName"].ToString();
     
     //create list item
     ListViewItem lvItem = new ListViewItem(lvData,0);
     listViewServices.Items.Add(lvItem);
   }
}
catch (Exception e)
{
   MessageBox.Show("Error: " + e);
}
}

7、 通过WMI修改IP，而实现不用重新启动？

using System;
using System.Management;
using System.Threading;

namespace WmiIpChanger
{
class IpChanger
{
   [MTAThread]
   static void Main(string[] args)
   {
    ReportIP();
    // SwitchToDHCP();
    SwitchToStatic();
    Thread.Sleep( 5000 );
    ReportIP();
    Console.WriteLine( "end." );
   }

   static void SwitchToDHCP()
   {
    ManagementBaseObject inPar = null;
    ManagementBaseObject outPar = null;
    ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration");
    ManagementObjectCollection moc = mc.GetInstances();
    foreach( ManagementObject mo in moc )
    {
     if( ! (bool) mo["IPEnabled"] )
      continue;

     inPar = mo.GetMethodParameters("EnableDHCP");
     outPar = mo.InvokeMethod( "EnableDHCP", inPar, null );
     break;
    }
   }

   static void SwitchToStatic()
   {
    ManagementBaseObject inPar = null;
    ManagementBaseObject outPar = null;
    ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration");
    ManagementObjectCollection moc = mc.GetInstances();
    foreach( ManagementObject mo in moc )
    {
     if( ! (bool) mo[ "IPEnabled" ] )
      continue;

     inPar = mo.GetMethodParameters( "EnableStatic" );
     inPar["IPAddress"] = new string[] { "192.168.1.1" };
     inPar["SubnetMask"] = new string[] { "255.255.255.0" };
     outPar = mo.InvokeMethod( "EnableStatic", inPar, null );
     break;
    }
   }

   static void ReportIP()
   {
    Console.WriteLine( "****** Current IP addresses:" );
    ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration");
    ManagementObjectCollection moc = mc.GetInstances();
    foreach( ManagementObject mo in moc )
    {
     if( ! (bool) mo[ "IPEnabled" ] )
      continue;

     Console.WriteLine( "{0}/n SVC: '{1}' MAC: [{2}]", (string) mo["Caption"],
      (string) mo["ServiceName"], (string) mo["MACAddress"] );

     string[] addresses = (string[]) mo[ "IPAddress" ];
     string[] subnets = (string[]) mo[ "IPSubnet" ];

     Console.WriteLine( " Addresses :" );
     foreach(string sad in addresses)
      Console.WriteLine( "/t'{0}'", sad );

     Console.WriteLine( " Subnets :" );
     foreach(string sub in subnets )
      Console.WriteLine( "/t'{0}'", sub );
    }
   }
}
}

8、 如何利用WMI远程重启远程计算机？
using System;
using System.Management;  
namespace WMI3
{
       /// <summary>
       /// Summary description for Class1.
       /// </summary>
       class Class1
       {
             static void Main(string[] args)
             {
                   Console.WriteLine("Computer details retrieved using Windows Management Instrumentation (WMI)");
                   Console.WriteLine("mailto:Written%&lt;st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="2" Month="1" Year="2002">2002/01/02%20By%20John%20O'[e-mail]");
                   Console.WriteLine("========================================
=================================");
                    //连接远程计算机
             ConnectionOptions co = new ConnectionOptions();
             co.Username = "john";
             co.Password = "john";
             System.Management.ManagementScope ms = new System.Management.ManagementScope("////192.168.1.2//root//cimv2", co);      
                   //查询远程计算机
            System.Management.ObjectQuery oq = new System.Management.ObjectQuery("SELECT * FROM Win32_OperatingSystem");
                  
            ManagementObjectSearcher query1 = new ManagementObjectSearcher(ms,oq);
            ManagementObjectCollection queryCollection1 = query1.Get();            
                   foreach( ManagementObject mo in queryCollection1 )
                   {
                         string[] ss={""};
                         mo.InvokeMethod("Reboot",ss);
                         Console.WriteLine(mo.ToString());
                   }
             }
       }
}  

9、利用WMI创建一个新的进程？

using System;
using System.Management;

// This sample demonstrates invoking a WMI method using parameter objects
public class InvokeMethod
{    
public static void Main()
{

   //Get the object on which the method will be invoked
   ManagementClass processClass = new ManagementClass("Win32_Process");

   //Get an input parameters object for this method
   ManagementBaseObject inParams = processClass.GetMethodParameters("Create");

   //Fill in input parameter values
   inParams["CommandLine"] = "calc.exe";

   //Execute the method
   ManagementBaseObject outParams = processClass.InvokeMethod ("Create", inParams, null);

   //Display results
   //Note: The return code of the method is provided in the "returnvalue" property of the outParams object
   Console.WriteLine("Creation of calculator process returned: " + outParams["returnvalue"]);
   Console.WriteLine("Process ID: " + outParams["processId"]);
}
}

10、 如何通过WMI终止一个进程？

using System;
using System.Management;

// This example demonstrates how to stop a system service.
class Sample_InvokeMethodOptions
{
     public static int Main(string[] args) {
         ManagementObject service =
             new ManagementObject("win32_service=/"winmgmt/"");
         InvokeMethodOptions options = new InvokeMethodOptions();
         options.Timeout = new TimeSpan(0,0,0,5);

         ManagementBaseObject outParams = service.InvokeMethod("StopService", null, options);

         Console.WriteLine("Return Status = " + outParams["Returnvalue"]);

         return 0;
     }
}

11、 如何用WMI 来获取远程机器的目录以及文件.比如如何列出一个目录下的所有文件,或者所有子目录;如何删除,舔加,更改文件?

using System;
using System.Management;

// This example demonstrates reading a property of a ManagementObject.

             class Sample_ManagementObject

             {

                 public static int Main(string[] args) {

                     ManagementObject disk = new ManagementObject(

                         "win32_logicaldisk.deviceid=/"c:/"");

                     disk.Get();

                     Console.WriteLine("Logical Disk Size = " + disk["Size"] + " bytes");

                     return 0;

                 }

             }

12、 参考资料
可以参考下列内容：

msdn WMI SDK:
us/wmisdk/wmi/wmi_start_page.asp http://msdn.microsoft.com/library/default.asp?url=/library/en-

WMI使用说明（csdn）:
http://www.csdn.net/develop/article/15/15346.shtm

WMI技术的应用 for .net（csdn）:
http://www.csdn.net/develop/article/16/16419.shtm

在.NET中轻松获取系统信息(1) －WMI篇（csdn）:
http://www.csdn.net/develop/article/15/15744.shtm

:)