註冊表項獲取值返回NULL

Question

爲什麼下面的代碼返回NULL爲shellValue？

 string shellValue; 
     RegistryKey shellKey = Registry.LocalMachine; 
     shellKey = shellKey.OpenSubKey(@"SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon", true); 
     shellValue = shellKey.GetValue("Shell") as string; 

我確實擁有管理員權限。

Answer 1

你實際上得到這個子項「HKEY_LOCAL_MACHINE \ SOFTWARE \ Wow6432Node \ Microsoft \ Windows NT \ CurrentVersion \ Winlogon \ Shell」。這是因爲有些鍵被WOW64重定向。檢查this欲知更多信息。

嘗試以下操作：

string shellValue; 
RegistryKey shellKey = RegistryKey.OpenBaseKey(Microsoft.Win32.RegistryHive.LocalMachine, RegistryView.Registry64);; 
shellKey = shellKey.OpenSubKey(@"SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon", true); 
shellValue = shellKey.GetValue("Shell") as string;