Registry.GetValue怎么了？ [英] What's wrong with Registry.GetValue?

问题描述

我试图获取注册表值：

var value = Registry.GetValue(@"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Cryptography", "MachineGuid", 0);

在Windows XP中一切正常，但在Windows 7中返回0。在 HKEY_LOCAL_MACHINE软件Microsoft\密码学使用regedit我看到 MachineGuid ，但是如果我运行

In Windows XP all ok, but in Windows 7 returns 0. In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Cryptography using regedit I see MachineGuid, but if I run

var keys = Registry.LocalMachine.OpenSubKey("SOFTWARE").OpenSubKey("Microsoft").OpenSubKey("Cryptography", RegistryKeyPermissionCheck.ReadSubTree).GetValueNames();

键。长度为0。

我做错了什么？

推荐答案

问题是，如果您将解决方案编译为x86，则问题是

The problem is that you probably are compiling the solution as x86, if you compile as x64 you can read the values.

尝试将以下代码编译为x86和x64：

Try the following code compiling as x86 and x64:

class Program
{
    static void Main(string[] args)
    {
        Console.WriteLine("MachineGUID:" + MachineGUID);

        Console.ReadKey();
    }

    public static string MachineGUID
    {
        get
        {
            Guid guidMachineGUID;
            if (Microsoft.Win32.Registry.LocalMachine.OpenSubKey("SOFTWARE\\Microsoft\\Cryptography") != null)
            {
                if (Microsoft.Win32.Registry.LocalMachine.OpenSubKey("SOFTWARE\\Microsoft\\Cryptography").GetValue("MachineGuid") != null)
                {
                    guidMachineGUID = new Guid(Microsoft.Win32.Registry.LocalMachine.OpenSubKey("SOFTWARE\\Microsoft\\Cryptography").GetValue("MachineGuid").ToString());
                    return guidMachineGUID.ToString();
                }
            }
            return null;
        }
    }
}

您可以阅读有关< a href = http://msdn.microsoft.com/en-us/library/aa384129.aspx>访问备用注册表视图。

您可以在此处一种在x86和x64中读取值的方法。

You can found in here a way of reading values in x86 and x64.

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