How to detect IIS version using C#?

Question

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)

Server-side or client side (e.g. calling an IIS web from a winforms app) ? I guess you mean server-side. — splattne
– splattne, Commented Jan 15, 2009 at 11:58
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) should wrote it in the main question..(sorry).. — Amr Elsehemy
– Amr Elsehemy, Commented Jan 15, 2009 at 12:11

Jeff LaFay · Accepted Answer · 2014-04-10 13:53:25Z

37

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

edited Apr 10, 2014 at 13:53

Jeff LaFay

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answered Nov 9, 2009 at 9:23

ErTelis

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1 Comment

Sudhanshu Mishra Over a year ago

Works with Windows 2003 Server as well!

Igal Tabachnik · Accepted Answer · 2009-01-15 12:20:29Z

29

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.

edited Jan 15, 2009 at 12:20

answered Jan 15, 2009 at 11:17

Igal Tabachnik

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1 Comment

julealgon Over a year ago

Can you elaborate on how to get this information outside of a request context? Say I need to fetch this during application startup. Are these server variables available elsewhere, or is there a separate mechanism that can be queried then? For instance, on .NET Framework, this is available even outside of requests: HttpRuntime.IISVersion Property

Jesper Palm · Accepted Answer · 2009-01-15 12:26:53Z

11

This is how i do it.

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

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

answered Jan 15, 2009 at 12:26

Jesper Palm

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2 Comments

Ignacio Soler Garcia Over a year ago

This is throwing a FileNotFoundException on Windows2008R2 (even when the file is there). Looks like a file permission issue.

Berend Engelbrecht Over a year ago

The file is not found by a 32 bits process on a 64 bits server because inetsrc\inetinfo.exe does not exist in the SysWOW64 directory. The registry method of jlafay works in all cases because the registry value is present in both the 32 bits and 64 bits sections of HKLM.

Xn0vv3r · Accepted Answer · 2009-01-15 11:20:37Z

7

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

answered Jan 15, 2009 at 11:20

Xn0vv3r

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1 Comment

Stefan Steiger Over a year ago

IIS 7 also has an entry in HKLM\SYSTEM\CurrentControlSet\Services\W3SVC\Parameters, at least on Windows7 32 bit. (Major version 7, minor version 5). But this key appears not to be availalbe on Windows Server 2008 (IIS7) anymore.

gkrogers · Accepted Answer · 2009-01-15 11:27:53Z

4

Use System.Web.HttpRequest.ServerVariables("SERVER_SOFTWARE"). The return value is a string in the format name/version.

answered Jan 15, 2009 at 11:27

gkrogers

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Comments

Robert · Accepted Answer · 2014-08-04 15:47:02Z

4

In .NET 4.5

HttpRuntime.IISVersion

edited Aug 4, 2014 at 15:47

Robert

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answered Aug 4, 2014 at 15:28

h0ckey09

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2 Comments

h0ckey09 Over a year ago

Self-explanatory... How to detect IIS version using C#? Use httpRuntime.IISVersion.

Beofett Over a year ago

As I understand the question, the OP is looking for IIS version when running the installer. HttpRuntime.IISVersion will return null if the application running is not hosted by IIS, so this answer doesn't appear to help the OP.

0x49D1 · Accepted Answer · 2009-01-15 11:23:10Z

3

It is usually presented in http header of response, as i know.

answered Jan 15, 2009 at 11:23

0x49D1

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Mahmut EFE · Accepted Answer · 2013-04-08 08:32:38Z

3

You can use below code

public static bool IisInstalled()
        {
            try
            {
                using (RegistryKey iisKey = Registry.LocalMachine.OpenSubKey(@"Software\Microsoft\InetStp"))
                {
                    return (int)iisKey.GetValue("MajorVersion") >= 6;
                }
            }
            catch
            {
                return false;
            }
        }

fore more information visit : http://www.java2s.com/Code/CSharp/Windows/IIShelperisIISInstalledIISstateIISversion.htm

answered Apr 8, 2013 at 8:32

Mahmut EFE

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mas_oz2k1 · Accepted Answer · 2011-12-22 02:59:36Z

2

For installer with custom actions: In your custom action view, you can pass data to your customer installer class via the "CustomActionData" attribute in the properties for the custom action as follows: /iisv="[IISVERSION]"

Check:

http://johnbarshinger.wordpress.com/2006/10/27/how-to-modify-the-vs2005-installer-to-set-the-asp-net-version-and-create-application-pools/

answered Dec 22, 2011 at 2:59

mas_oz2k1

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Community · Accepted Answer · 2017-05-23 12:33:27Z

0

I would just check the version of the OS: xp has IIS 5.1, Server 2003 has IIS 6 and vista/Server 2008 has IIS 7.

Here's how to check the version of the OS.

edited May 23, 2017 at 12:33

CommunityBot

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answered Aug 18, 2009 at 8:30

Lodewijk

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Ironicnet · Accepted Answer · 2009-01-15 11:22:49Z

-2

Check the X-Powered-By header: http://www.http-stats.com/X-Powered-By

There you can find the possibly values...

answered Jan 15, 2009 at 11:22

Ironicnet

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