如何从服务读取注册表?

我有一个.net服务在安装时刚刚开始失败(意味着它不会启动)。

注意 :这是64位服务

我最近所做的更改是检查.net框架版本,如Init函数调用中所示。

    public Service1()
    {
        InitializeComponent();

        CanHandleSessionChangeEvent = true; //can't be called after service start !

        Init();
    }

我在这里进行检查以查找.net框架版本:

    private void Init()
    {
        try{
            string version = GetVersion();
            // check version here
        }catch(Exception ex){
            // log the error
        }
    }

GetVersion返回运行服务的系统的.net版本: 注意:此代码来自MS网站

    private string GetVersion()
    {
        const string subkey = @"SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Full\";

        string retval = "0.0";

        using (RegistryKey ndpKey = RegistryKey.OpenBaseKey(RegistryHive.LocalMachine, RegistryView.Registry32).OpenSubKey(subkey))
        {
            if (ndpKey != null)
            {
                object obj = ndpKey.GetValue("Release");
                if( obj != null )
                {
                    retval = CheckFor45PlusVersion((int)obj);
                }                    
            }
        }

        Console.WriteLine(retval);
        return retval;
    }

这个函数只是做一些数字检查 注意:这来自一个MS网站

    private string CheckFor45PlusVersion(int releaseKey)
    {
        if (releaseKey >= 461808)
            return "4.7.2";
        if (releaseKey >= 461308)
            return "4.7.1";
        if (releaseKey >= 460798)
            return "4.7";
        if (releaseKey >= 394802)
            return "4.6.2";
        if (releaseKey >= 394254)
            return "4.6.1";
        if (releaseKey >= 393295)
            return "4.6";
        if (releaseKey >= 379893)
            return "4.5.2";
        if (releaseKey >= 378675)
            return "4.5.1";
        if (releaseKey >= 378389)
            return "4.5";

        // This code should never execute. A non-null release key should mean that 4.5 or later is installed.
        return "4.0";
    }

思考要点:

    using (RegistryKey ndpKey = RegistryKey.OpenBaseKey(RegistryHive.LocalMachine, RegistryView.Registry32)

事件查看器错误

这是我从EventViewer得到的唯一错误

Product: Service1 -- Error 1923. Service 'Service1' (Service1) could not be installed.  Verify that you have sufficient privileges to install system services.