Asked  11 Months ago    Answers:  5   Viewed   18 times

I am trying to fetch Windows version with C# on my Windows 10 machine.

I always get those values (with C#C++):

Major: 6

Minor: 2

Which is Windows 8 OS, accordingly to MSDN

C# code:

var major = OperatingSystem.Version.Major
var minor  = OperatingSystem.Version.Minor

C++ code

void print_os_info()
{
    //http://stackoverflow.com/questions/1963992/check-windows-version
    OSVERSIONINFOW info;
    ZeroMemory(&info, sizeof(OSVERSIONINFOW));
    info.dwOSVersionInfoSize = sizeof(OSVERSIONINFOW);

    LPOSVERSIONINFOW lp_info = &info;
    GetVersionEx(lp_info);

    printf("Windows version: %u.%un", info.dwMajorVersion, info.dwMinorVersion);
}

Windows 10 suppose to be with those:

Major: 10

Minor: 0*

  • (When I am taking a dump file from running process I can see that the OS version of that file is set to 10.0)

built by: 10.0.10586.0 (th2_release.151029-1700)

What am I missing here?

 Answers

3

As the accepted answer is only for C#, here is a solution for C++.

It uses the RtlGetVersion in the ntdll.dll that uses the same structure as GetVersionEx (name is different, but the elements are the same) and gives you the correct version. As this function is normally used for driver development, the function is declared in the DDK and not in the SDK. So I used a dynamic solution to call the function. Please be aware that the ntdll.dll is loaded and released in every call. So if you need the function more often, keep the library loaded.

The structure pOSversion is pointing to must be initialized like for GetVersionEx.

BOOL GetTrueWindowsVersion(OSVERSIONINFOEX* pOSversion)
{
   // Function pointer to driver function
   NTSTATUS (WINAPI *pRtlGetVersion)(
      PRTL_OSVERSIONINFOW lpVersionInformation) = NULL;

   // load the System-DLL
   HINSTANCE hNTdllDll = LoadLibrary("ntdll.dll");

   // successfully loaded?
   if (hNTdllDll != NULL)
   {
      // get the function pointer to RtlGetVersion
      pRtlGetVersion = (NTSTATUS (WINAPI *)(PRTL_OSVERSIONINFOW))
            GetProcAddress (hNTdllDll, "RtlGetVersion");

      // if successfull then read the function
      if (pRtlGetVersion != NULL)
         pRtlGetVersion((PRTL_OSVERSIONINFOW)pOSversion);

      // free the library
      FreeLibrary(hNTdllDll);
   } // if (hNTdllDll != NULL)

   // if function failed, use fallback to old version
   if (pRtlGetVersion == NULL)
      GetVersionEx((OSVERSIONINFO*)pOSversion);

   // always true ...
   return (TRUE);
} // GetTrueWindowsVersion
Thursday, July 22, 2021
 
Exoon
 
5

Detecting browser's details:

var nVer = navigator.appVersion;
var nAgt = navigator.userAgent;
var browserName  = navigator.appName;
var fullVersion  = ''+parseFloat(navigator.appVersion); 
var majorVersion = parseInt(navigator.appVersion,10);
var nameOffset,verOffset,ix;

// In Opera, the true version is after "Opera" or after "Version"
if ((verOffset=nAgt.indexOf("Opera"))!=-1) {
 browserName = "Opera";
 fullVersion = nAgt.substring(verOffset+6);
 if ((verOffset=nAgt.indexOf("Version"))!=-1) 
   fullVersion = nAgt.substring(verOffset+8);
}
// In MSIE, the true version is after "MSIE" in userAgent
else if ((verOffset=nAgt.indexOf("MSIE"))!=-1) {
 browserName = "Microsoft Internet Explorer";
 fullVersion = nAgt.substring(verOffset+5);
}
// In Chrome, the true version is after "Chrome" 
else if ((verOffset=nAgt.indexOf("Chrome"))!=-1) {
 browserName = "Chrome";
 fullVersion = nAgt.substring(verOffset+7);
}
// In Safari, the true version is after "Safari" or after "Version" 
else if ((verOffset=nAgt.indexOf("Safari"))!=-1) {
 browserName = "Safari";
 fullVersion = nAgt.substring(verOffset+7);
 if ((verOffset=nAgt.indexOf("Version"))!=-1) 
   fullVersion = nAgt.substring(verOffset+8);
}
// In Firefox, the true version is after "Firefox" 
else if ((verOffset=nAgt.indexOf("Firefox"))!=-1) {
 browserName = "Firefox";
 fullVersion = nAgt.substring(verOffset+8);
}
// In most other browsers, "name/version" is at the end of userAgent 
else if ( (nameOffset=nAgt.lastIndexOf(' ')+1) < 
          (verOffset=nAgt.lastIndexOf('/')) ) 
{
 browserName = nAgt.substring(nameOffset,verOffset);
 fullVersion = nAgt.substring(verOffset+1);
 if (browserName.toLowerCase()==browserName.toUpperCase()) {
  browserName = navigator.appName;
 }
}
// trim the fullVersion string at semicolon/space if present
if ((ix=fullVersion.indexOf(";"))!=-1)
   fullVersion=fullVersion.substring(0,ix);
if ((ix=fullVersion.indexOf(" "))!=-1)
   fullVersion=fullVersion.substring(0,ix);

majorVersion = parseInt(''+fullVersion,10);
if (isNaN(majorVersion)) {
 fullVersion  = ''+parseFloat(navigator.appVersion); 
 majorVersion = parseInt(navigator.appVersion,10);
}

document.write(''
 +'Browser name  = '+browserName+'<br>'
 +'Full version  = '+fullVersion+'<br>'
 +'Major version = '+majorVersion+'<br>'
 +'navigator.appName = '+navigator.appName+'<br>'
 +'navigator.userAgent = '+navigator.userAgent+'<br>'
)

Source JavaScript: browser name.
See JSFiddle to detect Browser Details.

Detecting OS:

// This script sets OSName variable as follows:
// "Windows"    for all versions of Windows
// "MacOS"      for all versions of Macintosh OS
// "Linux"      for all versions of Linux
// "UNIX"       for all other UNIX flavors 
// "Unknown OS" indicates failure to detect the OS

var OSName="Unknown OS";
if (navigator.appVersion.indexOf("Win")!=-1) OSName="Windows";
if (navigator.appVersion.indexOf("Mac")!=-1) OSName="MacOS";
if (navigator.appVersion.indexOf("X11")!=-1) OSName="UNIX";
if (navigator.appVersion.indexOf("Linux")!=-1) OSName="Linux";

document.write('Your OS: '+OSName);

source JavaScript: OS detection.
See JSFiddle to detect OS Details.

    var nVer = navigator.appVersion;
    var nAgt = navigator.userAgent;
    var browserName  = navigator.appName;
    var fullVersion  = ''+parseFloat(navigator.appVersion); 
    var majorVersion = parseInt(navigator.appVersion,10);
    var nameOffset,verOffset,ix;
    
    // In Opera, the true version is after "Opera" or after "Version"
    if ((verOffset=nAgt.indexOf("Opera"))!=-1) {
     browserName = "Opera";
     fullVersion = nAgt.substring(verOffset+6);
     if ((verOffset=nAgt.indexOf("Version"))!=-1) 
       fullVersion = nAgt.substring(verOffset+8);
    }
    // In MSIE, the true version is after "MSIE" in userAgent
    else if ((verOffset=nAgt.indexOf("MSIE"))!=-1) {
     browserName = "Microsoft Internet Explorer";
     fullVersion = nAgt.substring(verOffset+5);
    }
    // In Chrome, the true version is after "Chrome" 
    else if ((verOffset=nAgt.indexOf("Chrome"))!=-1) {
     browserName = "Chrome";
     fullVersion = nAgt.substring(verOffset+7);
    }
    // In Safari, the true version is after "Safari" or after "Version" 
    else if ((verOffset=nAgt.indexOf("Safari"))!=-1) {
     browserName = "Safari";
     fullVersion = nAgt.substring(verOffset+7);
     if ((verOffset=nAgt.indexOf("Version"))!=-1) 
       fullVersion = nAgt.substring(verOffset+8);
    }
    // In Firefox, the true version is after "Firefox" 
    else if ((verOffset=nAgt.indexOf("Firefox"))!=-1) {
     browserName = "Firefox";
     fullVersion = nAgt.substring(verOffset+8);
    }
    // In most other browsers, "name/version" is at the end of userAgent 
    else if ( (nameOffset=nAgt.lastIndexOf(' ')+1) < 
              (verOffset=nAgt.lastIndexOf('/')) ) 
    {
     browserName = nAgt.substring(nameOffset,verOffset);
     fullVersion = nAgt.substring(verOffset+1);
     if (browserName.toLowerCase()==browserName.toUpperCase()) {
      browserName = navigator.appName;
     }
    }
    // trim the fullVersion string at semicolon/space if present
    if ((ix=fullVersion.indexOf(";"))!=-1)
       fullVersion=fullVersion.substring(0,ix);
    if ((ix=fullVersion.indexOf(" "))!=-1)
       fullVersion=fullVersion.substring(0,ix);
    
    majorVersion = parseInt(''+fullVersion,10);
    if (isNaN(majorVersion)) {
     fullVersion  = ''+parseFloat(navigator.appVersion); 
     majorVersion = parseInt(navigator.appVersion,10);
    }
    
    document.write(''
     +'Browser name  = '+browserName+'<br>'
     +'Full version  = '+fullVersion+'<br>'
     +'Major version = '+majorVersion+'<br>'
     +'navigator.appName = '+navigator.appName+'<br>'
     +'navigator.userAgent = '+navigator.userAgent+'<br>'
    )

    // This script sets OSName variable as follows:
    // "Windows"    for all versions of Windows
    // "MacOS"      for all versions of Macintosh OS
    // "Linux"      for all versions of Linux
    // "UNIX"       for all other UNIX flavors 
    // "Unknown OS" indicates failure to detect the OS
    
    var OSName="Unknown OS";
    if (navigator.appVersion.indexOf("Win")!=-1) OSName="Windows";
    if (navigator.appVersion.indexOf("Mac")!=-1) OSName="MacOS";
    if (navigator.appVersion.indexOf("X11")!=-1) OSName="UNIX";
    if (navigator.appVersion.indexOf("Linux")!=-1) OSName="Linux";
    
    document.write('Your OS: '+OSName);
Tuesday, June 1, 2021
 
5

howto net os version

VB:

Public Function GetOSVersion() As String
    Select Case Environment.OSVersion.Platform
        Case PlatformID.Win32S
            Return "Win 3.1"
        Case PlatformID.Win32Windows
            Select Case Environment.OSVersion.Version.Minor
                Case 0
                    Return "Win95"
                Case 10
                    Return "Win98"
                Case 90
                    Return "WinME"
                Case Else
                    Return "Unknown"
            End Select
        Case PlatformID.Win32NT
            Select Case Environment.OSVersion.Version.Major
                Case 3
                    Return "NT 3.51"
                Case 4
                    Return "NT 4.0"
                Case 5
                    Select Case _
                        Environment.OSVersion.Version.Minor
                        Case 0
                            Return "Win2000"
                        Case 1
                            Return "WinXP"
                        Case 2
                            Return "Win2003"
                    End Select
                Case 6
                    Select Case _
                        Environment.OSVersion.Version.Minor
                        Case 0
                            Return "Vista/Win2008Server"
                        Case 1
                            Return "Win7/Win2008Server R2"
                        Case 2
                            Return "Win8/Win2012Server"
                        Case 3
                            Return "Win8.1/Win2012Server R2"
                    End Select
                Case 10  //this will only show up if the application has a manifest file allowing W10, otherwise a 6.2 version will be used
                  Return "Windows 10"
                Case Else
                    Return "Unknown"
            End Select
        Case PlatformID.WinCE
            Return "Win CE"
    End Select
End Function

C#

public string GetOSVersion()
{
  switch (Environment.OSVersion.Platform) {
    case PlatformID.Win32S:
      return "Win 3.1";
    case PlatformID.Win32Windows:
      switch (Environment.OSVersion.Version.Minor) {
        case 0:
          return "Win95";
        case 10:
          return "Win98";
        case 90:
          return "WinME";
      }
      break;

    case PlatformID.Win32NT:
      switch (Environment.OSVersion.Version.Major) {
        case 3:
          return "NT 3.51";
        case 4:
          return "NT 4.0";
        case 5:
          switch (Environment.OSVersion.Version.Minor) {
            case 0:
              return "Win2000";
            case 1:
              return "WinXP";
            case 2:
              return "Win2003";
          }
          break;

        case 6:
          switch(Environment.OSVersion.Version.Minor) {
            case 0:
              return "Vista/Win2008Server";
            case 1:
              return "Win7/Win2008Server R2";
            case 2:
              return "Win8/Win2012Server";
            case 3:
              return "Win8.1/Win2012Server R2";
          }
          break;
        case 10:  //this will only show up if the application has a manifest file allowing W10, otherwise a 6.2 version will be used
          return "Windows 10";
      }
      break;

    case PlatformID.WinCE:
      return "Win CE";
  }

  return "Unknown";
}
Wednesday, July 28, 2021
 
1

There is a RUBY_PATCHLEVEL constant as well. So you can get your version string as

"#{RUBY_VERSION}-p#{RUBY_PATCHLEVEL}"
Friday, September 24, 2021
 
1

The easiest way to distinguish between 32bit and 64bit is through environmental variable PROCESSOR_ARCHITECTURE.

string value = Environment.GetEnvironmentVariable("PROCESSOR_ARCHITECTURE");

if you run this code on 32bit Windows, value will be either "x86" or empty. On 64bit Windows I assume it will be set to anything but "x86". Kind of messy but so far it works on all versions of Windows where you can execute .NET program.

You can also use more modern WMI to query practically all information about operating system you can imagine but this will only work on Windows 2000 or newer. If you can live with that, check this blog post for some examples.

Tuesday, November 9, 2021
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