how do I detect user operating system

Question

I have the following code to obtain user details:

HttpBrowserCapabilities bc = HttpContext.Current.Request.Browser;
string UserAgent = HttpContext.Current.Re         


        

Answer 1

The VB.NET answer: I include it only because it might be easier to read and understand.

Public Function GetOS() As String
    Dim MyAgent As String = Current.Request.UserAgent
    If MyAgent.IndexOf("Windows NT 10.0") >= 0 Then
        Return "Windows 10"
    ElseIf MyAgent.IndexOf("Windows NT 6.3") >= 0 Then
        Return "Windows 8.1"
    ElseIf MyAgent.IndexOf("Windows NT 6.2") >= 0 Then
        Return "Windows 8"
    ElseIf MyAgent.IndexOf("Windows NT 6.1") >= 0 Then
        Return "Windows 7"
    ElseIf MyAgent.IndexOf("Windows NT 6.0") >= 0 Then
        Return "Windows Vista"
    ElseIf MyAgent.IndexOf("Windows NT 5.2") >= 0 Then
        Return "Windows Server 2003"
    ElseIf MyAgent.IndexOf("Windows NT 5.1") >= 0 Then
        Return "Windows XP"
    ElseIf MyAgent.IndexOf("Windows NT 5.01") >= 0 Then
        Return "Windows 2000 (SP1)"
    ElseIf MyAgent.IndexOf("Windows NT 5.0") >= 0 Then
        Return "Windows 2000"
    ElseIf MyAgent.IndexOf("Windows NT 4.5") >= 0 Then
        Return "Windows NT 4.5"
    ElseIf MyAgent.IndexOf("Windows NT 4.0") >= 0 Then
        Return "Windows NT 4.0"
    ElseIf MyAgent.IndexOf("Win 9x 4.90") >= 0 Then
        Return "Windows ME"
    ElseIf MyAgent.IndexOf("Windows 98") >= 0 Then
        Return "Windows 98"
    ElseIf MyAgent.IndexOf("Windows 95") >= 0 Then
        Return "Windows 95"
    ElseIf MyAgent.IndexOf("Windows CE") >= 0 Then
        Return "Windows CE"
    ElseIf (MyAgent.Contains("iPad")) Then
        Return String.Format("iPad OS {0}", GetMobileVersion(MyAgent, "OS"))
    ElseIf (MyAgent.Contains("iPhone")) Then
        Return String.Format("iPhone OS {0}", GetMobileVersion(MyAgent, "OS"))
    ElseIf (MyAgent.Contains("Linux") AndAlso MyAgent.Contains("KFAPWI")) Then
        Return "Kindle Fire"
    ElseIf (MyAgent.Contains("RIM Tablet") OrElse (MyAgent.Contains("BB") AndAlso MyAgent.Contains("Mobile"))) Then
        Return "Black Berry"
    ElseIf (MyAgent.Contains("Windows Phone")) Then
        Return String.Format("Windows Phone {0}", GetMobileVersion(MyAgent, "Windows Phone"))
    ElseIf (MyAgent.Contains("Mac OS")) Then
        Return "Mac OS"
    ElseIf MyAgent.IndexOf("ANDROID") >= 0 Then
        Return String.Format("Android {0}", GetMobileVersion(MyAgent, "ANDROID"))
    Else
        Return "OS is unknown."
    End If
End Function

Private Function GetMobileVersion(userAgent As String, device As String) As String
    Dim ReturnValue As String = String.Empty
    Dim RawVersion As String = userAgent.Substring(userAgent.IndexOf(device) + device.Length).TrimStart()
    For Each character As Char In RawVersion
        If IsNumeric(character) Then
            ReturnValue &= character
        ElseIf (character = "." OrElse character = "_") Then
            ReturnValue &= "."
        Else
            Exit For
        End If
    Next
    Return ReturnValue
End Function

Answer 2

John the VB function is nice but the line for Windows 10 does not work because you have "WINDOWS" in uppercase.

It should be same as others i.e.

If MyAgent.IndexOf("Windows NT 10.0") >= 0 Then
        Return "Windows 10"

Answer 3

Use the version number after "Windows NT". Windows 7 has 6.1 as version number.

But don't rely too much on that, user agent string is non standard. For example look this list, you'll see that someone is using Internet Explorer with Windows 9.0!

Answer 4

There's no accurate way of doing so as all the information you get from user request's headers which can easily be changed by user and can contain just anything.

If you're OK with reading probably inaccurate information then you may want to check this SO answer to similar question

Answer 5

All In One Class

  public class OS
        {
            public string os_name { get; set; }
            public string os_version { get; set; }

            public OS()
            {
                var ua = HttpContext.Current.Request.UserAgent;
                if (ua.Contains("Android"))
                {
                    this.os_name = "Android";
                    SetVersion(ua, "Android");
                    return;
                }

                if (ua.Contains("iPhone"))
                {
                    this.os_name = "iPhone";
                    SetVersion(ua, "OS");
                    return;
                }

                if (ua.Contains("iPad"))
                {
                    this.os_name = "iPad";
                    SetVersion(ua, "OS");
                    return;
                }

                if (ua.Contains("Mac OS"))
                {
                    this.os_name = "Mac OS";
                    return;
                }

                if (ua.Contains("Windows NT 10"))
                {
                    this.os_name = "Windows";
                    this.os_version = "10";
                    return;
                }

                if (ua.Contains("Windows NT 6.3"))
                {
                    this.os_name = "Windows";
                    this.os_version = "8.1";
                    return;
                }

                if (ua.Contains("Windows NT 6.2"))
                {
                    this.os_name = "Windows";
                    this.os_version = "8";
                    return;
                }


                if (ua.Contains("Windows NT 6.1"))
                {
                    this.os_name = "Windows";
                    this.os_version = "7";
                    return;
                }

                if (ua.Contains("Windows NT 6.0"))
                {
                    this.os_name = "Windows";
                    this.os_version = "Vista";
                    return;
                }

                if (ua.Contains("Windows NT 5.1") || ua.Contains("Windows NT 5.2"))

                {
                    this.os_name = "Windows";
                    this.os_version = "XP";
                    return;
                }

                if (ua.Contains("Windows NT 5"))
                {
                    this.os_name = "Windows";
                    this.os_version = "2000";
                    return;
                }

                if (ua.Contains("Windows NT 4"))
                {
                    this.os_name = "Windows";
                    this.os_version = "NT4";
                    return;
                }

                if (ua.Contains("Win 9x 4.90"))
                {
                    this.os_name = "Windows";
                    this.os_version = "Me";
                    return;
                }

                if (ua.Contains("Windows 98"))
                {
                    this.os_name = "Windows";
                    this.os_version = "98";
                    return;
                }

                if (ua.Contains("Windows 95"))
                {
                    this.os_name = "Windows";
                    this.os_version = "95";
                    return;
                }


                if (ua.Contains("Windows Phone"))
                {
                    this.os_name = "Windows Phone";
                    SetVersion(ua, "Windows Phone");
                    return;
                }

                if (ua.Contains("Linux") && ua.Contains("KFAPWI"))
                {
                    this.os_name = "Kindle Fire";
                    return;
                }

                if (ua.Contains("RIM Tablet") || (ua.Contains("BB") && ua.Contains("Mobile")))
                {
                    this.os_name = "Black Berry";
                    return;
                }

                //fallback to basic platform:
                this.os_name = request.Browser.Platform + (ua.Contains("Mobile") ? " Mobile " : "");
            }

            private void SetVersion(string userAgent, string device)
            {
                var temp = userAgent.Substring(userAgent.IndexOf(device) + device.Length).TrimStart();
                var version = string.Empty;

                foreach (var character in temp)
                {
                    var validCharacter = false;
                    int test = 0;

                    if (Int32.TryParse(character.ToString(), out test))
                    {
                        version += character;
                        validCharacter = true;
                    }

                    if (character == '.' || character == '_')
                    {
                        version += '.';
                        validCharacter = true;
                    }

                    if (validCharacter == false)
                        break;
                }
                this.os_version = version;
            }
        }

Usage

var os = new OS();
os.os_name; // here is os name
os.os_version; // here is os vers