DOTNETVISHAL: Get Operating System Name, Service Pack and Architecture

Monday, 29 October 2012

Get Operating System Name, Service Pack and Architecture

Get Operating System Name, Service Pack and Architecture

Here is a method to get the operating system name, Service Pack and Architecture using WMI:

using System;
using System.Management;
using System.Text.RegularExpressions;
/// <summary>
/// Gets Operating System Name, Service Pack, and Architecture using WMI 

with the legacy methods as a fallback
/// </summary>
/// <returns>String containing the name of the operating system followed by

 its service pack (if any) and architecture</returns>
private string getOSInfo()
{
 ManagementObjectSearcher objMOS = new ManagementObjectSearcher 

("SELECT * FROM  Win32_OperatingSystem");

 //Variables to hold our return value
 string os = "";
 int OSArch = 0;

 try
 {
  foreach (ManagementObject objManagement in objMOS.Get())
  {
   // Get OS version from WMI - This also gives us the edition
   object osCaption = objManagement.GetPropertyValue("Caption");
   if (osCaption != null)
   {
    // Remove all non-alphanumeric characters so that only letters, 

numbers, and spaces are left.
    string osC = Regex.Replace(osCaption.ToString(),"[^A-Za-z0-9 ]","");
    //string osC = osCaption.ToString();
    // If the OS starts with "Microsoft," remove it.  We know that already
    if (osC.StartsWith("Microsoft"))
    {
     osC = osC.Substring(9);
    }
    // If the OS now starts with "Windows," again... useless.  Remove it.
    if (osC.Trim().StartsWith("Windows"))
    {
     osC = osC.Trim().Substring(7);
    }
    // Remove any remaining beginning or ending spaces.
    os = osC.Trim();
    // Only proceed if we actually have an OS version - service pack is 

useless without the OS version.
    if(!String.IsNullOrEmpty(os))
    {
     object osSP = null;
     try
     {
      // Get OS service pack from WMI
      osSP = objManagement.GetPropertyValue("ServicePackMajorVersion");
      if (osSP != null && osSP.ToString() != "0")
      {
       os += " Service Pack " + osSP.ToString();
      }
      else
      {
       // Service Pack not found.  Try built-in Environment class.
       os += getOSServicePackLegacy();
      }
     }
     catch (Exception)
     {
      // There was a problem getting the service pack from WMI.  

Try built-in Environment class.
      os += getOSServicePackLegacy();
     }
    }
    object osA = null;
    try
    {
     // Get OS architecture from WMI
     osA = objManagement.GetPropertyValue("OSArchitecture");
     if (osA != null)
     {
      string osAString = osA.ToString();
      // If "64" is anywhere in there, it's a 64-bit architectore.
      OSArch = (osAString.Contains("64") ? 64 : 32);
     }
    }
    catch (Exception)
    {
    }
   }
  }
 }
 catch (Exception)
 {
 }
 // If WMI couldn't tell us the OS, use our legacy method.
 // We won't get the exact OS edition, but something is better than nothing.
 if (os == "")
 {
  os = getOSLegacy();
 }
 // If WMI couldn't tell us the architecture, use our legacy method.
 if (OSArch == 0)
 {
  OSArch = getOSArchitectureLegacy();
 }
 return os + " " + OSArch.ToString() + "-bit";
}
/// <summary>
/// Gets Operating System Name using .Net's Environment class.
/// </summary>
/// <returns>String containing the name of the operating system followed

 by its service pack (if any)</returns>
private string getOSLegacy()
{
 //Get Operating system information.
 OperatingSystem os = Environment.OSVersion;
 //Get version information about the os.
 Version vs = os.Version;

 //Variable to hold our return value
 string operatingSystem = "";

 if (os.Platform == PlatformID.Win32Windows)
 {
  //This is a pre-NT version of Windows
  switch (vs.Minor)
  {
   case 0:
    operatingSystem = "95";
    break;
   case 10:
    if (vs.Revision.ToString() == "2222A")
     operatingSystem = "98SE";
    else
     operatingSystem = "98";
    break;
   case 90:
    operatingSystem = "Me";
    break;
   default:
    break;
  }
 }
 else if(os.Platform == PlatformID.Win32NT)
 {
  switch (vs.Major)
  {
   case 3:
    operatingSystem = "NT 3.51";
    break;
   case 4:
    operatingSystem = "NT 4.0";
    break;
   case 5:
    if (vs.Minor == 0)
    {
     operatingSystem = "2000";
    }
    else
    {
     operatingSystem = "XP";
    }
    break;
   case 6:
    if (vs.Minor == 0)
    {
     operatingSystem = "Vista";
    }
    else
    {
     operatingSystem = "7";
    }
    break;
   default:
    break;
  }
 }
 //Make sure we actually got something in our OS check
 //We don't want to just return " Service Pack 2"
 //That information is useless without the OS version.
 if(operatingSystem != "")
 {
  //Got something.  Let's see if there's a service pack installed.
  operatingSystem += getOSServicePackLegacy();
 }
 //Return the information we've gathered.
 return operatingSystem;
}
/// <summary>
/// Gets the installed Operating System Service Pack using .Net's Environment class.
/// </summary>
/// <returns>String containing the operating system's installed service pack (if any)</returns>
private string getOSServicePackLegacy()
{
 // Get service pack from Environment Class
 string sp = Environment.OSVersion.ServicePack;
 if (sp != null && sp.ToString() != "" && sp.ToString() != " ")
 {
  // If there's a service pack, return it with a space in front (for formatting)
  return " " + sp.ToString();
 }
 // No service pack.  Return an empty string
 return "";
}
/// <summary>
/// Gets Operating System Architecture.  This does not tell you if the program 
/// in running in 32- or 64-bit mode or if the CPU is 64-bit capable.  
/// It tells you whether the actual Operating System is 32- or 64-bit.
/// </summary>
/// <returns>Int containing 32 or 64 representing the number of bits 

///in the OS Architecture</returns>
private int getOSArchitectureLegacy()
{
 string pa = Environment.GetEnvironmentVariable("PROCESSOR_ARCHITECTURE");
 return ((String.IsNullOrEmpty(pa) || String.Compare(pa,0,"x86",0,3,true) 

 == 0) ? 32 : 64);
}