1.WMI简介
WMI是英文Windows Management Instrumentation的简写，通过使用WMI，我们可以获取本地或远程服务器的性能参数和进程运行情况，以及大部分硬件信息，但前提是运行的用户要有足够的权限，如administrator组用户等。这也是做负载均衡所需要且比较方便快捷的途径。
2.使用时首先添加System.Management.dll，然后引用
using System.Management;
3.定义远程访问
public class ManagementConnectPool
{
private static System.Management.ConnectionOptions Conn = new ConnectionOptions() ;
private static ManagementObjectSearcher mos = new ManagementObjectSearcher();
private string username = “”;
private string pwd = “”;
private string space=””;
private string server = “”;
public ManagementConnectPool(string mpusername,string mppwd , string mpspace ,string mpserver)
{
this.username = mpusername;
this.pwd = mppwd;
this.space = mpspace;
this.server = mpserver;
Conn.Username = mpusername;
Conn.Password = mppwd;
string scopestring =”\” + mpserver + mpspace;
System.Management.ManagementScope Ms = new ManagementScope(scopestring);
Ms.Connect();
mos.Scope = Ms;
}
public ManagementObjectCollection getQueryResult(string queryString)
{
ObjectQuery oq = new ObjectQuery();
oq.QueryString = queryString;
mos.Query = oq;
ManagementObjectCollection moc =mos.Get();
return moc;
}
}
4.获取CPU，内存，网络流量等信息
public class Monitor
{
private string username = “”;
private string pwd =””;
private string ip = “”;
ManagementConnectPool mcp;
WMSServerClass server;
public Monitor(string username,string pwd,string ip)…{
this.username = username;
this.pwd = pwd ;
this.ip = ip;
mcp = new ManagementConnectPool(username,pwd,”rootcimv2″,ip);
server = new WMSServerClass();
}
#region WMI方式获取网卡流量
private void getNetWorkFlow()
{
ManagementObjectCollection moc = mcp.getQueryResult(@”select * from Win32_NetworkAdapter where macaddress<>null and manufacturer<>’Microsoft'”);
string[] list = new string[moc.Count] ;
foreach(System.Management.ManagementObject mymac in moc)
{
string a = mymac[“Speed”].ToString();//null WMI未实现该属性
Console.WriteLine(a.ToString());
}
}
#endregion
#region WMI方式获取CPU信息
private void getCpuInfo()
{
ManagementObjectCollection moc = mcp.getQueryResult(“select * from Win32_Processor”);
string[] list = new string[moc.Count];
int i = 0;
foreach(ManagementObject mo in moc)
{
string total = mo.GetPropertyValue(“LoadPercentage”).ToString();
list[i]=total;
i++;
}
}
#endregion
#region WMI方式获取内存使用率
public string getMemoryUsage()
{
ManagementObjectCollection moc = mcp.getQueryResult(“select * from Win32_LogicalMemoryConfiguration”);
int totalm = 1; int avilablem = 1;
foreach(ManagementObject mo in moc)
{
string total = mo.GetPropertyValue(“TotalPhysicalMemory”).ToString();
totalm = int.Parse(total);
}
moc = mcp.getQueryResult(“select * from Win32_PerfRawData_PerfOS_Memory”);
foreach(ManagementObject mo in moc)
{
string avilable = mo.GetPropertyValue(“AvailableKBytes”).ToString();
avilablem = int.Parse(avilable);
}
int usedm = totalm – avilablem;
double memoryusage = (double)usedm * (double)100 / (double)totalm ;
return memoryusage.ToString();
}
#endregion
}
5.获取本地机器信息
#region 1.如何用WMI获得指定磁盘的容量
private string DriveType(string type)
{
string rtntype=””;
switch (type)
{
case “1”:
rtntype=”Not Type”;
break;
case “2”:
rtntype=”Floppy disk”;
break;
case “3”:
rtntype=”Hard disk”;
break;
case “4”:
rtntype=”Removable drive or network drive”;
break;
case “5”:
rtntype=”CD-ROM”;
break;
case “6”:
rtntype=”RAM disk”;
break;
default :
break;
}
return rtntype;
}
private void Button1_Click(object sender, System.EventArgs e)
{
SelectQuery query=new SelectQuery(“Select * From Win32_LogicalDisk”);
ManagementObjectSearcher searcher=new ManagementObjectSearcher(query);
foreach(ManagementBaseObject disk in searcher.Get())
{
Response.Write(disk[“Name”] +” “+DriveType(disk[“DriveType”].ToString()) + ” ” + disk[“VolumeName”]+”<br>”);
}
}
#endregion
#region 2.如何用WMI获得指定磁盘的容量
private void Button2_Click(object sender, System.EventArgs e)
{
ManagementObject disk = new ManagementObject(“win32_logicaldisk.deviceid=”c:””);
disk.Get();
Response.Write(“Logical Disk Size = ” + disk[“Size”] + ” bytes”);
}
#endregion
#region 3.如何列出机器中所有的共享资源
private void Button3_Click(object sender, System.EventArgs e)
{
ManagementObjectSearcher searcher = new ManagementObjectSearcher(“SELECT * FROM Win32_share”);
foreach (ManagementObject share in searcher.Get())
{
Response.Write(share.GetText(TextFormat.Mof));
}
}
#endregion
#region 4.怎样写程控制让系统中的某个文件夹共享或取消共享
private void Button4_Click(object sender, System.EventArgs e)
{
/**
//*首先，这需要以有相应权限的用户登录系统才行
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。
*/
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);
}
#endregion
#region 5.如何获得系统服务的运行状态
private void Button5_Click(object sender, System.EventArgs e)
{
string[] lvData = new string[4];
ManagementObjectSearcher searcher =new ManagementObjectSearcher(“SELECT * FROM Win32_Service”);
foreach (ManagementObject mo in searcher.Get())
{
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();
Response.Write(lvData[0]+lvData[1]+lvData[2]+lvData[3]);
}
}
#endregion
#region 6.通过WMI修改IP，而实现不用重新启动
private void Button6_Click(object sender, System.EventArgs e)
{
ReportIP();
// SwitchToDHCP();
SwitchToprivate();
Thread.Sleep( 5000 );
ReportIP();
Response.Write( “end.” );
}
private 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;
}
}
private void SwitchToprivate()
{
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( “Enableprivate” );
inPar[“IPAddress”] = new string[]{ “192.168.1.1” };
inPar[“SubnetMask”] = new string[]{ “255.255.255.0” };
outPar = mo.InvokeMethod( “Enableprivate”, inPar, null );
break;
}
}
private void ReportIP()
{
Response.Write( “****** Current IP addresses:” );
ManagementClass mc = new ManagementClass(“Win32_NetworkAdapterConfiguration”);
ManagementObjectCollection moc = mc.GetInstances();
foreach( ManagementObject mo in moc )
{
if( ! (bool) mo[ “IPEnabled” ] )
continue;
string str=”{0} SVC: ‘{1}’ MAC: [{2}]”;
str= string.Format(mo[“Caption”].ToString(), mo[“ServiceName”].ToString(),mo[“MACAddress”].ToString());
Response.Write(str);
string[] addresses = (string[]) mo[ “IPAddress” ];
string[] subnets = (string[]) mo[ “IPSubnet” ];
Response.Write( ” Addresses :” );
foreach(string sad in addresses)
Response.Write(sad+”<br>”);
Response.Write( ” Subnets :” );
foreach(string sub in subnets )
Response.Write(sub+”<br>”);
}
}
#endregion
#region 7.如何利用WMI远程重启远程计算机
private void Button7_Click(object sender, System.EventArgs e)
{
Response.Write(“Computer details retrieved using Windows Management Instrumentation (WMI)”);
Response.Write(“mailto:singlepine@hotmail.com”);
Response.Write(“=========================================================================”);
//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(“\192.168.1.2rootcimv2”, 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);
Response.Write(mo.ToString());
}
}
#endregion
#region 8.利用WMI创建一个新的进程
private void Button8_Click(object sender, System.EventArgs e)
{
//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
Response.Write(“Creation of calculator process returned: ” + outParams[“returnvalue”]);
Response.Write(“Process ID: ” + outParams[“processId”]);
}
#endregion
#region 9.如何通过WMI终止一个进程
private void Button9_Click(object sender, System.EventArgs e)
{
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);
Response.Write(“Return Status = ” + outParams[“Returnvalue”]);
}
#endregion
#region 10.如何用WMI 来获取远程机器的目录以及文件
private void Button10_Click(object sender, System.EventArgs e)
{
ManagementObject disk = new ManagementObject(
“win32_logicaldisk.deviceid=”c:””);
disk.Get();
Response.Write(“Logical Disk Size = ” + disk[“Size”] + ” bytes”);
}
#endregion
#region 11.网卡的MAC地址
private void Button11_Click(object sender, System.EventArgs e)
{
ManagementClass mc = new ManagementClass(“Win32_NetworkAdapterConfiguration”);
ManagementObjectCollection moc = mc.GetInstances();
foreach(ManagementObject mo in moc)
{
if((bool)mo[“IPEnabled”] == true)
Response.Write(“MAC address”+mo[“MacAddress”].ToString()+”<br>”);
mo.Dispose();
}
}
#endregion
#region 12.CPU的系列号
private void Button12_Click(object sender, System.EventArgs e)
{
string cpuInfo = “”;//cpu序列号
ManagementClass cimobject = new ManagementClass(“Win32_Processor”);
ManagementObjectCollection moc = cimobject.GetInstances();
foreach(ManagementObject mo in moc)
{
cpuInfo = mo.Properties[“ProcessorId”].Value.ToString();
Response.Write(cpuInfo);
}
}
#endregion
#region 13.主板的系列号
private void Button13_Click(object sender, System.EventArgs e)
{
ManagementObjectSearcher searcher=new ManagementObjectSearcher(“SELECT * FROM Win32_BaseBoard”);
foreach(ManagementObject share in searcher.Get())
{
Response.Write(“主板制造商:” + share[“Manufacturer”].ToString()) ;
Response.Write(“型号:” +share[“Product”].ToString()) ;
Response.Write(“序列号:”+share[“SerialNumber”].ToString()) ;
}
}
#endregion
#region 14.获取硬盘ID
private void Button14_Click(object sender, System.EventArgs e)
{
String HDid;
ManagementClass cimobject = new ManagementClass(“Win32_DiskDrive”);
ManagementObjectCollection moc = cimobject.GetInstances();
foreach(ManagementObject mo in moc)
{
HDid = (string)mo.Properties[“Model”].Value;
Response.Write(HDid);
}
}
#endregion
#region 15.获取本机的用户列表
private void Button15_Click(object sender, System.EventArgs e)
{
SelectQuery query = new SelectQuery(“SELECT * FROM Win32_UserAccount”);
ManagementObjectSearcher searcher = new ManagementObjectSearcher(query);
foreach(ManagementObject os in searcher.Get())
{
Response.Write(os[“Name”]);
}
}
#endregion
}
通过上面介绍的方法，可以很轻松的获取远程或本地机器的性能，进程和硬件信息等。另外：WMI也可以通过使用Vbscript等脚本调用。
说明：其中部分资源来自网友小山的blog。但不够详细说明WMI在服务器性能方面的能力！