C# 使用注册表

一、什么是注册表

        注册表是Microsoft Windows操作系统和其应用程序中的一个重要的层次型数据库,用于存储系统和应用程序的设置信息。由键(key,或称“项”)子键(subkey,子项值项(value)构成。一个键就是树状数据结构中的一个节点,而子键就是这个节点的子节点,子键也是键。一个值项则是一个键的一条属性,由名称(name)数据类型(datatype)以及数据(data)组成。一个键可以有一个或多个值,每个值的名称各不相同,如果一个值的名称为空,则该值为该键的默认值。

     (1)、注册表的数据类型主要有以下五种:

(2)、注册表有以下5个一级分支:

(3)、注册表的存储方式:

           Windows NT系列操作系统和Windows 9x系列的存储方式有很大区别。注册表被分成多个文件存储,称为Registry Hives,每一个文件被称为一个配置单元。在早期的Windows 3.x系列中,注册表仅包含一个reg.dat文件,所存放的内容后来演变为HKEY_CLASSES_ROOT分支。

Windows NT家族的配置单元文件:

         Windows 9x家族的配置单元文件:

 二、C#操作注册表

        我们可以使用外部加载windows操作系统自带的 Advapi32.dll 文件,实现注册表的操作。下面实例中,我们使用 .NET 平台自带的 Microsoft.Win32.Registry 类库,使用的时候添加如下引用:

  using Microsoft.Win32;
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        具体操作如下:

  1  public static class RegistryUtil
  2     {
  3         #region 创建注册表
  4         /// <summary>
  5         /// 创建注册表项
  6         /// </summary>
  7         /// <param name="keyPath"></param>
  8         /// <param name="parentKey"></param>
  9         /// <returns></returns>
 10         public static RegistryKey CreateRegistryKey(string keyPath, RegistryKey parentKey)
 11         {
 12             return parentKey?.CreateSubKey(keyPath);
 13         }
 14 
 15 
 16         /// <summary>
 17         /// 创建<see cref="Registry.LocalMachine">注册表项目
 18         /// </summary>
 19         /// <param name="keyPath"></param>
 20         /// <returns></returns>
 21         public static RegistryKey CreateRegistryLocalMachine64Key(string keyPath)
 22         {
 23             return Registry.LocalMachine.CreateSubKey(keyPath);
 24         }
 25 
 26         /// <summary>
 27         /// 创建<see cref="Registry.ClassesRoot">注册表项目
 28         /// </summary>
 29         /// <param name="keyPath"></param>
 30         /// <returns></returns>
 31         public static RegistryKey CreateRegistryClassesRootKey(string keyPath)
 32         {
 33             return Registry.ClassesRoot.CreateSubKey(keyPath);
 34         }
 35 
 36         /// <summary>
 37         /// 创建<see cref="Registry.CurrentConfig">注册表项目
 38         /// </summary>
 39         /// <param name="keyPath"></param>
 40         /// <returns></returns>
 41         public static RegistryKey CreateRegistryCurrentConfigKey(string keyPath)
 42         {
 43             return Registry.CurrentConfig.CreateSubKey(keyPath);
 44         }
 45 
 46         /// <summary>
 47         /// 创建<see cref="Registry.CurrentUser">注册表项目
 48         /// </summary>
 49         /// <param name="keyPath"></param>
 50         /// <returns></returns>
 51         public static RegistryKey CreateRegistryCurrentUserKey(string keyPath)
 52         {
 53             return Registry.CurrentUser.CreateSubKey(keyPath);
 54         }
 55 
 56         /// <summary>
 57         /// 创建<see cref="Registry.PerformanceData">注册表项目
 58         /// </summary>
 59         /// <param name="keyPath"></param>
 60         /// <returns></returns>
 61         public static RegistryKey CreateRegistryPerformanceDataKey(string keyPath)
 62         {
 63             return Registry.PerformanceData.CreateSubKey(keyPath);
 64         }
 65 
 66         /// <summary>
 67         /// 创建<see cref="Registry.Users">注册表项目
 68         /// </summary>
 69         /// <param name="keyPath"></param>
 70         /// <returns></returns>
 71         public static RegistryKey CreateRegistryUsersKey(string keyPath)
 72         {
 73             return Registry.Users.CreateSubKey(keyPath);
 74         }
 75         #endregion
 76 
 77 
 78         #region 打开注册表
 79         /// <summary>
 80         /// 打开 <see cref="RegistryView.Registry64"/><see cref="RegistryHive.LocalMachine"/>
 81         /// </summary>
 82         /// <returns></returns>
 83         public static RegistryKey OpenLocalMachine64Key()
 84         {
 85             return RegistryKey.OpenBaseKey(Microsoft.Win32.RegistryHive.LocalMachine, RegistryView.Registry64);
 86         }
 87 
 88         /// <summary>
 89         /// 打开 <see cref="RegistryView.Registry32"/><see cref="RegistryHive.LocalMachine"/>
 90         /// </summary>
 91         /// <returns></returns>
 92         public static RegistryKey OpenLocalMachine32Key()
 93         {
 94             return RegistryKey.OpenBaseKey(Microsoft.Win32.RegistryHive.LocalMachine, RegistryView.Registry32);
 95         }
 96 
 97         /// <summary>
 98         /// 打开 <see cref="RegistryView.Registry64"/><see cref="RegistryHive.CurrentUser"/>
 99         /// </summary>
100         /// <returns></returns>
101         public static RegistryKey OpenCurrentUser64Key()
102         {
103             return RegistryKey.OpenBaseKey(Microsoft.Win32.RegistryHive.CurrentUser, RegistryView.Registry64);
104         }
105 
106         /// <summary>
107         /// 打开 <see cref="RegistryView.Registry32"/><see cref="RegistryHive.LocalMachine"/>
108         /// </summary>
109         /// <returns></returns>
110         public static RegistryKey OpenCurrentUser32Key()
111         {
112             return RegistryKey.OpenBaseKey(Microsoft.Win32.RegistryHive.CurrentUser, RegistryView.Registry32);
113         }
114 
115         /// <summary>
116         /// 打开注册表键
117         /// </summary>
118         /// <param name="rootKey"></param>
119         /// <param name="keyPath"></param>
120         /// <returns></returns>
121         public static RegistryKey OpenKey(this RegistryKey rootKey, string keyPath)
122         {
123             return rootKey.OpenSubKey(keyPath, true);
124         }
125         #endregion
126 
127 
128         /// <summary>
129         /// 读取注册表值
130         /// </summary>
131         /// <param name="key"></param>
132         /// <param name="name"></param>
133         /// <returns></returns>
134         public static string ReadRegistryValue(this RegistryKey key, string name)
135         {
136             return key?.GetValue(name)?.ToString();
137         }
138 
139         /// <summary>
140         /// 写入注册表值
141         /// </summary>
142         /// <param name="key"></param>
143         /// <param name="name"></param>
144         /// <param name="value"></param>
145         public static void WriteRegistryValue(this RegistryKey key, string name, string value)
146         {
147             key.SetValue(name, value);
148         }
149 
150         /// <summary>
151         /// 删除注册值
152         /// </summary>
153         /// <param name="key"></param>
154         /// <param name="name"></param>
155         public static void DeleteRegistryValue(this RegistryKey key, string name)
156         {
157             key.DeleteValue(name);
158         }
159     }
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      调试代码如下:

 1   static void Main(string[] args)
 2         {
 3             // 写入注册表
 4             string path = @"SoftwareTestChar";
 5             var key = RegistryUtil.CreateRegistryLocalMachine64Key(path);
 6             key.WriteRegistryValue("Name", "Dwayne");
 7             key.WriteRegistryValue("Age", "18");
 8 
 9             // 读取注册表
10             var regKey = RegistryUtil.OpenLocalMachine64Key().OpenKey(path);
11             var name   = regKey.ReadRegistryValue("Name");
12             var age    = regKey.ReadRegistryValue("Age");
13             Console.WriteLine($"Name={name},Age={age}");
14 
15             Console.WriteLine("Hello World!");
16         }
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原文地址:https://www.cnblogs.com/dongweian/p/14144065.html