Get the version information of an installed service?

I want to check programmatically that the latest version of my Windows Service is installed. I have:

var ctl = ServiceController.GetServices().Where(s => s.ServiceName == "MyService").开发者_StackOverflow社区FirstOrDefault();
if (ctl != null) {
  // now what?
}

I don't see anything on the ServiceController interface that will tell me the version number. How do I do it?

---

I am afraid there is no way other than getting the executable path from the registry as ServiceController does not provide that information.

Here is a sample I had created before:

private static string GetExecutablePathForService(string serviceName, RegistryView registryView, bool throwErrorIfNonExisting)
    {
        string registryPath = @"SYSTEM\CurrentControlSet\Services\" + serviceName;
        RegistryKey key = RegistryKey.OpenBaseKey(RegistryHive.LocalMachine, registryView).OpenSubKey(registryPath);
        if(key==null)
        {
            if (throwErrorIfNonExisting)
                throw new ArgumentException("Non-existent service: " + serviceName, "serviceName");
            else
                return null;
        }
        string value = key.GetValue("ImagePath").ToString();
        key.Close();
        if(value.StartsWith("\""))
        {
            value = Regex.Match(value, "\"([^\"]+)\"").Groups[1].Value;
        }

        return Environment.ExpandEnvironmentVariables(value);
    }

After getting the exe path, just use FileVersionInfo.GetVersionInfo(exePath) class to get the version.

---

If you own the service, you can put version information into the DisplayName, e.g. DisplayName="MyService 2017.06.28.1517". This allows you to find an existing installation of your service and parse the version information:

var ctl = ServiceController
    .GetServices()
    .FirstOrDefault(s => s.ServiceName == "MyService");
if (ctl != null) {
    // get version substring, you might have your own style.
    string substr = s.DisplayName.SubString("MyService".Length);
    Version installedVersion = new Version(substr);
    // do stuff, e.g. check if installed version is newer than current assembly.
}

This may be useful if you want to avoid the registry. The problem is, that service entries can go to different parts of the registry depending on the installation routine.

---

If you are talking about getting the current version of your service automatically from the assembly properties then you can set up a property such as below in your ServiceBase class.

public static string ServiceVersion { get; private set; }

Then in your OnStart method add the following...

ServiceVersion = typeof(Program).Assembly.GetName().Version.ToString();

Full Example

using System.Diagnostics;
using System.ServiceProcess;

public partial class VaultServerUtilities : ServiceBase
{

    public static string ServiceVersion { get; private set; }

    public VaultServerUtilities()
    {
        InitializeComponent();

        VSUEventLog = new EventLog();
        if (!EventLog.SourceExists("Vault Server Utilities"))
        {
            EventLog.CreateEventSource("Vault Server Utilities", "Service Log");
        }

        VSUEventLog.Source = "Vault Server Utilities";
        VSUEventLog.Log = "Service Log";

    }


    protected override void OnStart(string[] args)
    {

        ServiceVersion = typeof(Program).Assembly.GetName().Version.ToString();
        VSUEventLog.WriteEntry(string.Format("Vault Server Utilities v{0} has started successfully.", ServiceVersion));

    }

    protected override void OnStop()
    {
        VSUEventLog.WriteEntry(string.Format("Vault Server Utilities v{0} has be shutdown.", ServiceVersion));
    }
}

In the example above my event log displays the current version of my service...