Windows Management Instrumentation (WMI) Tutorial PDF Print E-mail
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Monday, 09 March 2009
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WMI is one of those things you hear about but never take any notice until you look into a little bit and you realise the huge potential for monitoring your application.

This tutorial will let you interrgoate things such as the IIS Service and the MSSqlServer service. Note the potential with WMI is staggering - al you need is some thought about what you want to do with it.

Create a web application and call it WMI2 - just so you can cut and paste all of this code straight in.

Code behind Below 

Code behind Below
using System;
using System.ComponentModel;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Management;
namespace WMI2
{
/// /// Summary description for WebForm2./// public class WebForm2 : System.Web.UI.Page
{
protected System.Web.UI.WebControls.Label Label1;
protected System.Web.UI.WebControls.Button Button1;
protected System.Web.UI.WebControls.Button Button2;
protected System.Web.UI.WebControls.Button Button3;
protected System.Web.UI.WebControls.Button Button4;
protected System.Web.UI.WebControls.Button Button5;
protected System.Web.UI.WebControls.Button Button6;
protected System.ServiceProcess.ServiceController serviceController2;
protected System.Web.UI.WebControls.Button Button7;
protected System.Web.UI.WebControls.Label Label2;
protected System.Web.UI.WebControls.Button Button8;
protected System.Web.UI.WebControls.Button Button9;
protected System.ServiceProcess.ServiceController serviceController1;
private void Page_Load(object sender, System.EventArgs e)
{
string SQLstatus;
SQLstatus = serviceController1.Status.ToString();
Label1.Text =  SQLstatus.ToString();
}
#region Web Form Designer generated code
override protected void OnInit(EventArgs e)
{
//// CODEGEN: This call is required by the ASP.NET Web // Form Designer.

/// /// Required method for Designer support - do not modify

/// the contents of this method with the code editor./// private void InitializeComponent()
{    
this.serviceController1 = new System.ServiceProcess.ServiceController();
this.serviceController2 = new System.ServiceProcess.ServiceController();
this.Button5.Click += new System.EventHandler(this.Button5_Click);
this.Button1.Click += new System.EventHandler(this.Button1_Click);
this.Button2.Click += new System.EventHandler(this.Button2_Click);
this.Button3.Click += new System.EventHandler(this.Button3_Click);
this.Button4.Click += new System.EventHandler(this.Button4_Click);
this.Button6.Click += new System.EventHandler(this.Button6_Click);
// // serviceController1// this.serviceController1.MachineName = "gregor";
this.serviceController1.ServiceName = "MSSQLSERVER";
// // serviceController2// this.serviceController2.MachineName = "gregor";
this.serviceController2.ServiceName = "IISADMIN";
this.Button7.Click += new System.EventHandler(this.Button7_Click);
this.Button8.Click += new System.EventHandler(this.Button8_Click);
this.Button9.Click += new System.EventHandler(this.Button9_Click);
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
#region OperatingSystem
private void OperatingSystem()
{
//List a few operating System variales

//List is alomost endless of things you can query againstnewcatch(Exception ex)
{
Response.Write(ex.Message);
}
}            
#endregion
#region Start Sql Server Service Button
private void Button1_Click(object sender, System.EventArgs e)
{
//Start the Sql Server windows service

//only start it if its not currently runningif (serviceController1.Status.ToString() != "Running")
{
serviceController1.Start();
}
}
catch(Win32Exception myEx)
{
Response.Write (myEx.Message);
}
catch(Exception ex)
{
Response.Write(ex.Message);
}
}
#endregion
#region Stop Sql Server Service Button
private void Button2_Click(object sender, System.EventArgs e)
{    
//Stop the Sql Server windows serviceif (serviceController1.Status.ToString() != "Stopped")
{
serviceController1.Stop();
}
}
catch(Win32Exception myEx)
{
Response.Write (myEx.Message);
}
catch(Exception ex)
{
Response.Write(ex.Message);
}
}    
#endregion
#region StartedServices - Lists all Services which are running.
private void StartedServices()
{
//List all currently started windows servicesnew ManagementObjectSearcher

("SELECT * FROM Win32_Service WHERE Started = TRUE");
foreach (ManagementObject service in searcher.Get())
Response.Write("Service = " +
service["Caption"] + "
");
}
catch(Exception e)
{
Response.Write(e.Message);  
}
}
#endregion
#region StoppedServices - Lists all Services which arent running.
private void StoppedServices()
{
//List all currently stopped windows servicesnewcatch(Exception e)
{
Response.Write(e.Message);  
}
}
#endregion
#region Started Service Button
private void Button3_Click(object sender, System.EventArgs e)
{
//Lists all Services which are runningprivate void Button4_Click(object sender, System.EventArgs e)
{
//Lists all Services which arent runningprivate void Button5_Click(object sender, System.EventArgs e)
{
//Display a few Operating system valuesprivate void EventLog()
{
//List all currently started windows servicesnew ManagementObjectSearcher

("SELECT * FROM Win32_NTLogEvent");
foreach (ManagementObject service in searcher.Get())
{
Response.Write("Service = " + service.Path.Path + "
");
Response.Write("Service = " + 
service.Path.RelativePath.ToString() + "
");
}
}
catch(Exception e)
{
Response.Write(e.Message);  
}
}
#endregion
private void Button6_Click(object sender, System.EventArgs e)
{
EventLog();
}
private void Button7_Click(object sender, System.EventArgs e)
{
string IISStatus;
IISStatus = serviceController2.Status.ToString();
Label2.Text = IISStatus;
}
private void Button8_Click(object sender, System.EventArgs e)
{
//Start the IIS Admin Service//only start it if its not currently runningif 

(serviceController2.Status.ToString() != "Running")
{
serviceController2.Start();
}
}
catch(Win32Exception myEx)
{
Response.Write (myEx.Message);
}
catch(Exception ex)
{
Response.Write(ex.Message);
}
}
private void Button9_Click(object sender, System.EventArgs e)
{
//Stop the Sql Server windows serviceif (serviceController2.Status.ToString() != "Stopped")
{
serviceController2.Stop();
}
}
catch(Win32Exception myEx)
{
Response.Write (myEx.Message);
}
catch(Exception ex)
{
Response.Write(ex.Message);
}
}
}
}
InitializeComponent();
base.OnInit(e);
}
try
{
ManagementObjectSearcher query1 = 
ManagementObjectSearcher("SELECT * FROM Win32_OperatingSystem") ;
ManagementObjectCollection queryCollection1 = query1.Get();
foreach( ManagementObject mo in queryCollection1 ) 
{
Response.Write("Name : " + mo["name"].ToString());
Response.Write("
"); 
Response.Write("Version : " + mo["version"].ToString());
Response.Write("
");
Response.Write("Manufacturer : " + 
mo["Manufacturer"].ToString());
Response.Write("
");
Response.Write("Computer Name : " 
+ mo["csname"].ToString());
Response.Write("
");
Response.Write("Windows Directory : " +
mo["WindowsDirectory"].ToString());
Response.Write("
");
}   
}
try
{
try
{
try
{
ManagementObjectSearcher searcher = 
try
{
ManagementObjectSearcher searcher = 
ManagementObjectSearcher("SELECT * FROM Win32_Service WHERE Started = False");
foreach (ManagementObject service in searcher.Get())
Response.Write("Service = " + 
service["Caption"] + "
");
}
StartedServices();
}
#endregion
#region Stopped Service Button
StoppedServices(); 
}
#endregion
#region Operating System Button
OperatingSystem();
}
#endregion
#region EventLog
try
{
ManagementObjectSearcher searcher = 
try
{
try
{

HTML Page code also below:

<%@ Page language="c#" Codebehind="WebForm1.aspx.cs" AutoEventWireup="false"
    Inherits="WMI2.WebForm2" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
<HEAD>
    <title>WebForm1</title>
    <meta name="GENERATOR" Content="Microsoft Visual Studio 7.0">
    <meta name="CODE_LANGUAGE" Content="C#">
    <meta name="vs_defaultClientScript" content="JavaScript">
    <meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
</HEAD>
<body MS_POSITIONING="GridLayout">
<form id="Form1" method="post" runat="server">
    <TABLE id="Table1" style="Z-INDEX: 101; LEFT: 8px; POSITION: absolute; TOP: 8px"
                    cellSpacing="1" cellPadding="1" width="100%" border="0">
        <TR>
            <TD align="right">
                SQL Server Status:
                <asp:Label id="Label1" runat="server"
                        Width="188px"></asp:Label></TD>
        </TR>
        <TR>
            <TD align="right">
                <asp:Button id="Button5" runat="server"
                Text="Display some Operating System details"></asp:Button></TD>
        </TR>
        <TR>
            <TD align="right">
                <asp:Button id="Button1" runat="server"
                    Text="Start SQL Server"></asp:Button></TD>
        </TR>
        <TR>
            <TD align="right">
                <asp:Button id="Button2" runat="server"
                    Text="Stop Sql Server"></asp:Button></TD>
        </TR>
        <TR>
            <TD align="right">
                <asp:Button id="Button3" runat="server"
                    Text="List all running services"></asp:Button></TD>
        </TR>
        <TR>
            <TD align="right">
                <asp:Button id="Button4" runat="server"
                    Text="List all stopped services"></asp:Button></TD>
        </TR>
        <TR>
            <TD align="right">
                <asp:Button id="Button6" runat="server"
                    Text="Event Log Stuff"></asp:Button></TD>
        </TR>
        <TR>
            <TD align="right">
                <asp:Label id="Label2" runat="server"></asp:Label>
                <asp:Button id="Button7" runat="server"
                    Text="IIS Admin"></asp:Button></TD>
        </TR>
        <TR>
            <TD align="right">
                <asp:Button id="Button8" runat="server"
                    Text="Restart IIS"></asp:Button></TD>
        </TR>
        <TR>
            <TD align="right">
                <asp:Button id="Button9" runat="server"
                    Text="Stop IIS"></asp:Button></TD>
        </TR>
    </TABLE>
</form>
</body>
</HTML>

Last Updated ( Monday, 09 March 2009 )
 
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