如何使用 C# 代码检测系统上是否安装了“.Net Framework 4.6.1 Hotfix”？

Question

有时人们安装了 .net Framework 4.6.1 而我的应用程序无法在他们的环境中正常工作，除非他们还安装了 .Net Framework 4.6.1 修补程序。所以我必须在每个客户端的机器上明确地解决这个问题。并编写一个程序来执行此检查以帮助支持人员。

这里是检测客户端机器上是否安装了 4.6.1 或更高版本但没有检查 4.6.1 修补程序的示例代码。注意：64 位操作系统是先决条件。

    private static bool CheckIfVCInstalledOrNot()
    {
        bool vcInstalled = true;
        try
        {
            if (!Utilities.RedistributablePackage.IsInstalled(Utilities.RedistributablePackageVersion.VC2015to2019x64))
            {
                if (!Utilities.RedistributablePackage.IsInstalled(Utilities.RedistributablePackageVersion.VC2017x64))
                {
                    if (!Utilities.RedistributablePackage.IsInstalled(Utilities.RedistributablePackageVersion.VC2015x64))
                    {
                        if (!Utilities.RedistributablePackage.IsInstalled(Utilities.RedistributablePackageVersion.VC2013x64))
                        {
                            vcInstalled = false;
                        }
                    }
                }
            }
        }
        catch (Exception ex)
        {
            Utilities.Logging.ErrorLog(ex);
        }
        return vcInstalled;
    }

public enum RedistributablePackageVersion
{
    VC2013x64,
    VC2015x64,
    VC2017x64,
    VC2015to2019x64
};

public static class RedistributablePackage
{
    /// <summary>
    /// Check if a Microsoft Redistributable Package is installed.
    /// </summary>
    /// <param name="redistributableVersion">The package version to detect.</param>
    /// <returns><c>true</c> if the package is installed, otherwise <c>false</c></returns>
    public static bool IsInstalled(RedistributablePackageVersion redistributableVersion)
    {
        try
        {
            switch (redistributableVersion)
            {
                case RedistributablePackageVersion.VC2015to2019x64:
                    var parametersVc2015to2019x64 = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Microsoft\DevDiv\VC\Servicing.0\RuntimeMinimum", false);
                    if (parametersVc2015to2019x64 == null) return false;
                    var vc2015to2019x64Version = parametersVc2015to2019x64.GetValue("Version");
                    if (((string)vc2015to2019x64Version).StartsWith("14"))
                    {
                        return true;
                    }
                    break;
                case RedistributablePackageVersion.VC2017x64:
                    var paths2017x64 = new List<string>
                    {
                        @"Installer\Dependencies\,,amd64,14.0,bundle",
                        @"Installer\Dependencies\VC,redist.x64,amd64,14.16,bundle" //changed in 14.16.x
                    };
                    foreach (var path in paths2017x64)
                    {
                        var parametersVc2017x64 = Registry.ClassesRoot.OpenSubKey(path, false);
                        if (parametersVc2017x64 == null) continue;
                        var vc2017x64Version = parametersVc2017x64.GetValue("Version");
                        if (vc2017x64Version == null) return false;
                        if (((string)vc2017x64Version).StartsWith("14"))
                        {
                            return true;
                        }
                    }
                    break;
                case RedistributablePackageVersion.VC2015x64:
                    var parametersVc2015x64 = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Classes\Installer\Dependencies\{d992c12e-cab2-426f-bde3-fb8c53950b0d}", false);
                    if (parametersVc2015x64 == null) return false;
                    var vc2015x64Version = parametersVc2015x64.GetValue("Version");
                    if (((string)vc2015x64Version).StartsWith("14"))
                    {
                        return true;
                    }
                    break;
                case RedistributablePackageVersion.VC2013x64:
                    var parametersVc2013x64 = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Classes\Installer\Dependencies\{050d4fc8-5d48-4b8f-8972-47c82c46020f}", false);
                    if (parametersVc2013x64 == null) return false;
                    var vc2013x64Version = parametersVc2013x64.GetValue("Version");
                    if (((string)vc2013x64Version).StartsWith("12"))
                    {
                        return true;
                    }
                    break;
            }
            return false;
        }
        catch (Exception)
        {
            return false;
        }
    }
}

Answer 1

您需要找到修补程序的注册表 DWORD 值并查询该值的注册表。

现在，如果您需要 hotfix 3154529，您可以看到注册表值为“394297”。

因此，您可以从这个 Table 中看出 .net framework 4.6.1 的值大于或等于 393295，带有修补程序的 4.6.1 应为 394297 或更大（较新的修补程序或已应用服务包）。

如何使用 C# 代码检测系统上是否安装了“.Net Framework 4.6.1 Hotfix”？

How to detect whether “.Net Framework 4.6.1 Hotfix” is installed on System or not using C# Code?

.net

c#

system-administration