Code:
/ FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / clr / src / BCL / Microsoft / Win32 / Registry.cs / 1 / Registry.cs
// ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== namespace Microsoft.Win32 { using System; using System.Runtime.InteropServices; using System.Runtime.Versioning; /** * Registry encapsulation. Contains members representing all top level system * keys. * * @security(checkClassLinking=on) */ //This class contains only static members and does not need to be serializable. [ComVisible(true)] public static class Registry { /** * Current User Key. * * This key should be used as the root for all user specific settings. */ [ResourceExposure(ResourceScope.Machine)] public static readonly RegistryKey CurrentUser = RegistryKey.GetBaseKey(RegistryKey.HKEY_CURRENT_USER); /** * Local Machine Key. * * This key should be used as the root for all machine specific settings. */ [ResourceExposure(ResourceScope.Machine)] public static readonly RegistryKey LocalMachine = RegistryKey.GetBaseKey(RegistryKey.HKEY_LOCAL_MACHINE); /** * Classes Root Key. * * This is the root key of class information. */ [ResourceExposure(ResourceScope.Machine)] public static readonly RegistryKey ClassesRoot = RegistryKey.GetBaseKey(RegistryKey.HKEY_CLASSES_ROOT); /** * Users Root Key. * * This is the root of users. */ [ResourceExposure(ResourceScope.Machine)] public static readonly RegistryKey Users = RegistryKey.GetBaseKey(RegistryKey.HKEY_USERS); /** * Performance Root Key. * * This is where dynamic performance data is stored on NT. * This does not exist on Win9X. */ [ResourceExposure(ResourceScope.Machine)] public static readonly RegistryKey PerformanceData = RegistryKey.GetBaseKey(RegistryKey.HKEY_PERFORMANCE_DATA); /** * Current Config Root Key. * * This is where current configuration information is stored. */ [ResourceExposure(ResourceScope.Machine)] public static readonly RegistryKey CurrentConfig = RegistryKey.GetBaseKey(RegistryKey.HKEY_CURRENT_CONFIG); /** * Dynamic Data Root Key. * * This is where dynamic performance data is stored on Win9X. * This does not exist on NT. */ [ResourceExposure(ResourceScope.Machine)] public static readonly RegistryKey DynData = RegistryKey.GetBaseKey(RegistryKey.HKEY_DYN_DATA); // // Following function will parse a keyName and returns the basekey for it. // It will also store the subkey name in the out parameter. // If the keyName is not valid, we will throw ArgumentException. // The return value shouldn't be null. // private static RegistryKey GetBaseKeyFromKeyName(string keyName, out string subKeyName) { if( keyName == null) { throw new ArgumentNullException("keyName"); } string basekeyName; int i = keyName.IndexOf('\\'); if( i != -1) { basekeyName = keyName.Substring(0, i).ToUpper(System.Globalization.CultureInfo.InvariantCulture); } else { basekeyName = keyName.ToUpper(System.Globalization.CultureInfo.InvariantCulture); } RegistryKey basekey = null; switch(basekeyName) { case "HKEY_CURRENT_USER": basekey = Registry.CurrentUser; break; case "HKEY_LOCAL_MACHINE": basekey = Registry.LocalMachine; break; case "HKEY_CLASSES_ROOT": basekey = Registry.ClassesRoot; break; case "HKEY_USERS": basekey = Registry.Users; break; case "HKEY_PERFORMANCE_DATA": basekey = Registry.PerformanceData; break; case "HKEY_CURRENT_CONFIG": basekey = Registry.CurrentConfig; break; case "HKEY_DYN_DATA": basekey = Registry.DynData; break; default: throw new ArgumentException(Environment.GetResourceString("Arg_RegInvalidKeyName", "keyName")); } if( i == -1 || i == keyName.Length) { subKeyName = string.Empty; } else { subKeyName = keyName.Substring(i + 1, keyName.Length - i - 1); } return basekey; } [ResourceExposure(ResourceScope.Machine)] [ResourceConsumption(ResourceScope.Machine)] public static object GetValue(string keyName, string valueName, object defaultValue ) { string subKeyName; RegistryKey basekey = GetBaseKeyFromKeyName(keyName, out subKeyName); BCLDebug.Assert(basekey != null, "basekey can't be null."); RegistryKey key = basekey.OpenSubKey(subKeyName); if(key == null) { // if the key doesn't exist, do nothing return null; } try { return key.GetValue(valueName, defaultValue); } finally { key.Close(); } } [ResourceExposure(ResourceScope.Machine)] [ResourceConsumption(ResourceScope.Machine)] public static void SetValue(string keyName, string valueName, object value ) { SetValue(keyName, valueName, value, RegistryValueKind.Unknown); } [ResourceExposure(ResourceScope.Machine)] [ResourceConsumption(ResourceScope.Machine)] public static void SetValue(string keyName, string valueName, object value, RegistryValueKind valueKind ) { string subKeyName; RegistryKey basekey = GetBaseKeyFromKeyName(keyName, out subKeyName); BCLDebug.Assert(basekey != null, "basekey can't be null!"); RegistryKey key = basekey.CreateSubKey(subKeyName); BCLDebug.Assert(key != null, "An exception should be thrown if failed!"); try { key.SetValue(valueName, value, valueKind); } finally { key.Close(); } } } }
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