How to detect IIS version using C#?

Question

How to detect IIS version using C#?

Update: I meant from a winapp (actually the scenario is developing a custom installer that wants to check the version of the installed IIS to call the appropriate api's)

Answer 1

Found the answer here: link text The fileVersion method dosesn't work on Windows 2008, the inetserv exe is somewhere else I guess.

public Version GetIisVersion()
{
    using (RegistryKey componentsKey = Registry.LocalMachine.OpenSubKey(@"Software\Microsoft\InetStp", false))
    {
        if (componentsKey != null)
        {
            int majorVersion = (int)componentsKey.GetValue("MajorVersion", -1);
            int minorVersion = (int)componentsKey.GetValue("MinorVersion", -1);

            if (majorVersion != -1 && minorVersion != -1)
            {
                return new Version(majorVersion, minorVersion);
            }
        }

        return new Version(0, 0);
    }
}

I tested it, it works perfectly on Windows XP, 7 and 2008

Answer 2

You can get this information from the SERVER_SOFTWARE variable. It will return the following:

Microsoft-IIS/5.0 (Windows 2000)
Microsoft-IIS/5.1 (Windows XP)
Microsoft-IIS/6.0 (Windows 2003 Server)

etc.

If you're using ASP.NET, you can get this string via

Request.ServerVariables["SERVER_SOFTWARE"];

EDIT: It seems that you will have to query the registry to get this information. Take a look at this page to see how.

Answer 3

This is how i do it.

FileVersionInfo verinfo = FileVersionInfo.GetVersionInfo(System.Environment.SystemDirectory + @"\inetsrv\inetinfo.exe");

//Tip... look at verinfo.MajorVersion.

Answer 4

U can find it in the registry.

Up to IIS version 6 you can find it here:

HKLM\SYSTEM\CurrentControlSet\Services\W3SVC\Parameters

Since version 7 here:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\InetStp

MajorVersion MinorVersion