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");

 }