C#操作注册表

1.读取指定名称的注册表的值 
private string GetRegistData(string name) 
{ 
   string registData; 
   RegistryKey hkml = Registry.LocalMachine; 
   RegistryKey software = hkml.OpenSubKey("SOFTWARE",true); 
   RegistryKey aimdir = software.OpenSubKey("XXX",true); 
   registData = aimdir.GetValue(name).ToString(); 
   return registData; 
} 
以上是读取的注册表中HKEY_LOCAL_MACHINE/SOFTWARE目录下的XXX目录中名称为name的注册表值； 

2.向注册表中写数据 
private void WTRegedit(string name,string tovalue) 
{ 
   RegistryKey hklm = Registry.LocalMachine; 
   RegistryKey software = hklm.OpenSubKey("SOFTWARE",true); 
   RegistryKey aimdir = software.CreateSubKey("XXX"); 
   aimdir.SetValue(name,tovalue); 
} 
以上是在注册表中HKEY_LOCAL_MACHINE/SOFTWARE目录下新建XXX目录并在此目录下创建名称为name值为tovalue的注册表项； 

3.删除注册表中指定的注册表项 
private void DeleteRegist(string name) 
{ 
   string[] aimnames; 
   RegistryKey hkml = Registry.LocalMachine; 
   RegistryKey software = hkml.OpenSubKey("SOFTWARE",true); 
   RegistryKey aimdir = software.OpenSubKey("XXX",true); 
   aimnames = aimdir.GetSubKeyNames(); 
   foreach(string aimKey in aimnames) 
   { 
    if(aimKey == name) 
     aimdir.DeleteSubKeyTree(name); 
   } 
} 
以上是在注册表中HKEY_LOCAL_MACHINE/SOFTWARE目录下XXX目录中删除名称为name注册表项； 

4.判断指定注册表项是否存在 
private bool IsRegeditExit(string name) 
{ 
   bool _exit = false; 
   string[] subkeyNames; 
   RegistryKey hkml = Registry.LocalMachine; 
   RegistryKey software = hkml.OpenSubKey("SOFTWARE",true); 
   RegistryKey aimdir = software.OpenSubKey("XXX",true); 
   subkeyNames = aimdir.GetSubKeyNames(); 
   foreach(string keyName in subkeyNames) 
   { 
    if(keyName == name) 
    { 
       _exit = true; 
       return _exit; 
    } 
   } 
   return _exit; 
} 
以上是在注册表中HKEY_LOCAL_MACHINE/SOFTWARE目录下XXX目录中判断名称为name注册表项是否存在，这一方法在删除注册表时已经存在，在新建一注册表项时也应有相应判断；  

一个例子：

using Microsoft.Win32;

    using System.Diagnostics;

    private void Access_Registry()

    {

         // 在HKEY_LOCAL_MACHINE/Software下建立一新键，起名为MCBInc

            RegistryKey key = Registry.LocalMachine.OpenSubKey("Software", true);

         // 增加一个子键

            RegistryKey newkey = key.CreateSubKey("MCBInc");

    // 设置此子键的值

            newkey.SetValue("MCBInc", "NET Developer");

  // 从注册表的其他地方获取数据

  // 找出你的CPU

            RegistryKey pRegKey = Registry.LocalMachine;

            pRegKey = pRegKey.OpenSubKey("HARDWARE//DESCRIPTION//System//CentralProcessor//0");

            Object val = pRegKey.GetValue("VendorIdentifier");

            Debug.WriteLine("The central processor of this machine is:"+ val);

         // 删除键值

            RegistryKey delKey = Registry.LocalMachine.OpenSubKey("Software", true);

            delKey.DeleteSubKey("MCBInc");

    }

---

 1   加键   改值   
    
  Microsoft.Win32.RegistryKey   Key   =   Microsoft.Win32.Registry.CurrentUser.CreateSubKey(   @"Software\Microsoft\Internet   Explorer\Main");   
  Key.SetValue(   "Window   Title"   ,   value   );   
  Key.Close();   
    
  2   得键值   
    
    
  Microsoft.Win32.RegistryKey   Key   =   Microsoft.Win32.Registry.CurrentUser.CreateSubKey(   @"Software\Microsoft\Internet   Explorer\Main");   
  return   Key.GetValue(   "Window   Title"   ).ToString();   
    
  3   删键   
    
    
  Microsoft.Win32.RegistryKey   Key   =   Microsoft.Win32.Registry.LocalMachine.CreateSubKey(   @"SOFTWARE\Microsoft\Windows\CurrentVersion\Policies");   
  Key.DeleteSubKeyTree(   "Ratings"   );   
  Key.Close();