C # registry operations

C # provides two primary registry-related classes:

RegistryAndRegistryKey,These two classes belongMicrosoft. Win32Namespace

 

The Registry class contains five public static fields, representing the five basic primary keys respectively:

Registry. ClassesRoot

Registry. CurrentUser

Registry. LocalMachine

Registry. Users

Registry. Current Config

These five classes correspond to the five pre-defined primary keys in the second-level directory of the Registry respectively.

 

RegistryKey class provides methods for registry operations

CreateSubKey // create a subkey

OpenSubKey // open a subkey

DeleteKey // delete a subkey

DeleteKeyTree // delete a key and all its keys

GetValue // obtain the key value

SetValue // set the key value

 

 

Example of creating a child key and setting a key value:

 

Code

 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); 

} 

 

 

Example of deleting a key value:

 

Code

 private void DeleteRegist(string name) 

{ 

   string[] aimnames; 

   RegistryKey hkml = Registry.LocalMachine; 

   RegistryKey software = hkml.OpenSubKey("SOFTWARE",true); 

   aimnames = software.GetSubKeyNames(); 

   foreach(string aimKey in aimnames) 

   { 

      if(aimKey == name) 

        aimdir.DeleteSubKeyTree(name); 

   } 

} 

 

 

When it comes to deleting a key value, you must pay attention to another issue: system permissions! Deleting a key directly triggers an unauthorized operation.

This involves another class.RegistrySecurity, It belongsSystem. Security. AccessControlNamespace

RegistrySecurityThe object specifies the access permission for the registry key and how to audit access attempts. The access permission for the registry key is embodied in rules, each access rule is composed of oneRegistryAccessRuleObject Representation. Each audit rule is composed of oneRegistryAuditRuleObject Representation

To copy access control security from one registry key to another, useRegistryKey. GetAccessControlMethodRegistrySecurityObject, and then useRegistryKey. SetAccessControlMethod or an acceptanceRegistrySecurityThe constructor of the object specifies the rule to the second registry key.

Sample Code:

 

Code

 RegistrySecurity rsy = new Registr