checking for .net framework 3.5

[lttan123]

How to detect whether the machine have .Net Framework 3.5 install
from framework 2.0

[MrMancunian]

You can see that in the Add/Remove Programs control panel...

Steven

[lttan123]

I mean doing it programatically from vb.net for example.

[MrMancunian]

I mean doing it programatically from vb.net for example.

I knew that, but you didn't ask for that...

A quick search on Google gave me this URL:

http://www.dotnetspide r.com/resources/20834-Check-Dot-Net-Version-Installed-PC.aspx

It's in C#, but easy enough to translate to VB.NET.

Steven

[bkreitman]

// A couple of quick methods to search the registry
// and check the "installed" status for each Framework on the system,

        public static ICollection<Version> GetInstalled_DotNet_Versions() {

            List<Version> installedVersions = new List<Version>();

            string componentsKeyName = @"SOFTWARE\Microsoft\NET Framework Setup\NDP";
            string version;
            int installedFlag;

            try {
                Microsoft.Win32.RegistryKey componentsKey = Microsoft.Win32.Registry.LocalMachine.OpenSubKey(componentsKeyName);
                string[] subkeys = componentsKey.GetSubKeyNames();

                foreach (string skey in subkeys) {
                    Microsoft.Win32.RegistryKey key = componentsKey.OpenSubKey(skey);

                    // Let's try to get any version information that's available 
                    version = (string)key.GetValue("Version");
                    installedFlag = (int)key.GetValue("Install");

                    if (installedFlag > 0)
                        installedVersions.Add(new Version(version));
                }
            }
            catch (Exception e) {
            }

            return installedVersions;
        }

        public static string GetMaxInstalled_DotNet_Version() {
            ICollection<Version> versions = GetInstalled_DotNet_Versions();
            Version maxVersion = new Version();
            foreach (Version v in versions) {
                if (v.CompareTo(maxVersion) > 0)
                    maxVersion = v;
            }
            return maxVersion.ToString();
        }