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Thread: [RESOLVED] Get the version number of an installed program

  1. #1

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    PowerPoster MMock's Avatar
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    Resolved [RESOLVED] Get the version number of an installed program

    Good morning. I have a C# application in which I would like to get this same information that is displayed in Windows Settings Add/Remove program. Both these applications are my own, which I believe is relevant and makes it much more straightforward than the solution that is proposed here.

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  2. #2

    Thread Starter
    PowerPoster MMock's Avatar
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    Re: Get the version number of an installed program

    I am all set. Here is my code.
    Code:
            private void GetCMSAppVersionCurrentlyInstalled()
            {
                RegistryKey baseRegistryKey = Registry.LocalMachine;
    
                string subKey = "SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall";
    
                RegistryKey uninstallKey = baseRegistryKey.OpenSubKey(subKey);
    
                string[] allApplications = uninstallKey.GetSubKeyNames();
    
                //RegistryKey appKey = baseRegistryKey.OpenSubKey(subKey + "\\" + applicationSubKeyName);
                RegistryKey appKey;
                string appName;
                string appVersion;
                for (int i = 0; i < allApplications.Length; ++i)
                {
                    appKey = baseRegistryKey.OpenSubKey(subKey + "\\" + allApplications[i]);
                    appName = (string)appKey.GetValue("DisplayName");
                    if (appName == "CMS App")
                    {
                        appVersion = (string)appKey.GetValue("DisplayVersion");
                        if (appVersion == "3.0.0")
                            bbInstallCMSApp.Hint = "You have the latest version of CMS App.";
                        else
                            bbInstallCMSApp.Hint = "There is a new CMS App available to install.";
                        // To end the loop
                        i = allApplications.Length;
                    }
                }
            }
    There are 10 kinds of people in this world. Those who understand binary, and those who don't.

  3. #3
    coder. Lord Orwell's Avatar
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    Re: [RESOLVED] Get the version number of an installed program

    I believe you went way overkill on this. You can easily pull a file's version like this:
    System.Diagnostics.FileVersionInfo fvi = System.Diagnostics.FileVersionInfo.GetVersionInfo(path-to-file);
    string version = fvi.ProductVersion;

  4. #4

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    PowerPoster MMock's Avatar
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    Re: [RESOLVED] Get the version number of an installed program

    Quote Originally Posted by Lord Orwell View Post
    I believe you went way overkill on this. You can easily pull a file's version like this:
    System.Diagnostics.FileVersionInfo fvi = System.Diagnostics.FileVersionInfo.GetVersionInfo(path-to-file);
    string version = fvi.ProductVersion;
    How do I know what path-to-file is? The user has control over the destination folder when he installs.
    There are 10 kinds of people in this world. Those who understand binary, and those who don't.

  5. #5
    coder. Lord Orwell's Avatar
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    Re: [RESOLVED] Get the version number of an installed program

    Quote Originally Posted by MMock View Post
    How do I know what path-to-file is? The user has control over the destination folder when he installs.
    well that would complicate things. If you're just trying to read your own app, that's easier.

  6. #6

    Thread Starter
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    Re: [RESOLVED] Get the version number of an installed program

    No problem. It's resolved as in post #2.
    Thanks.
    There are 10 kinds of people in this world. Those who understand binary, and those who don't.

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