Registry.ClassesRoot Field

Definition

Définit les types (ou classes) de documents ainsi que les propriétés associées à ces types.Defines the types (or classes) of documents and the properties associated with those types. Ce champ lit la clé de base HKEY_CLASSES_ROOT du Registre Windows.This field reads the Windows registry base key HKEY_CLASSES_ROOT.

public: static initonly Microsoft::Win32::RegistryKey ^ ClassesRoot;
public static readonly Microsoft.Win32.RegistryKey ClassesRoot;
 staticval mutable ClassesRoot : Microsoft.Win32.RegistryKey
Public Shared ReadOnly ClassesRoot As RegistryKey 

Field Value

RegistryKey

Examples

L’exemple suivant montre comment récupérer les sous-clés de cette clé et imprime leurs noms à l’écran.The following example demonstrates how to retrieve the subkeys of this key, and prints their names to the screen. Utilisez la méthode OpenSubKey pour créer une instance de la sous-clé particulière qui vous intéresse.Use the OpenSubKey method to create an instance of the particular subkey of interest. Vous pouvez ensuite utiliser d’autres opérations dans RegistryKey pour manipuler cette clé.You can then use other operations in RegistryKey to manipulate that key.

using namespace System;
using namespace Microsoft::Win32;
void PrintKeys( RegistryKey ^ rkey )
{
   
   // Retrieve all the subkeys for the specified key.
   array<String^>^names = rkey->GetSubKeyNames();
   int icount = 0;
   Console::WriteLine( "Subkeys of {0}", rkey->Name );
   Console::WriteLine( "-----------------------------------------------" );
   
   // Print the contents of the array to the console.
   System::Collections::IEnumerator^ enum0 = names->GetEnumerator();
   while ( enum0->MoveNext() )
   {
      String^ s = safe_cast<String^>(enum0->Current);
      Console::WriteLine( s );
      
      // The following code puts a limit on the number
      // of keys displayed.  Comment it out to print the
      // complete list.
      icount++;
      if ( icount >= 10 )
            break;
   }
}

int main()
{
   
   // Create a RegistryKey, which will access the HKEY_CLASSES_ROOT
   // key in the registry of this machine.
   RegistryKey ^ rk = Registry::ClassesRoot;
   
   // Print out the keys.
   PrintKeys( rk );
}

using System;
using Microsoft.Win32;

class Reg {
    public static void Main() {

        // Create a RegistryKey, which will access the HKEY_CLASSES_ROOT
        // key in the registry of this machine.
        RegistryKey rk = Registry.ClassesRoot;

        // Print out the keys.
        PrintKeys(rk);
    }

    static void PrintKeys(RegistryKey rkey) {

        // Retrieve all the subkeys for the specified key.
        String [] names = rkey.GetSubKeyNames();

        int icount = 0;

        Console.WriteLine("Subkeys of " + rkey.Name);
        Console.WriteLine("-----------------------------------------------");

        // Print the contents of the array to the console.
        foreach (String s in names) {
            Console.WriteLine(s);

            // The following code puts a limit on the number
            // of keys displayed.  Comment it out to print the
            // complete list.
            icount++;
            if (icount >= 10)
                break;
        }
    }
}
Imports Microsoft.Win32

Class Reg
    
    Public Shared Sub Main()
        
        ' Create a RegistryKey, which will access the HKEY_CLASSES_ROOT
        ' key in the registry of this machine.
        Dim rk As RegistryKey = Registry.ClassesRoot
        
        ' Print out the keys.
        PrintKeys(rk)
    End Sub    
    
    Shared Sub PrintKeys(rkey As RegistryKey)
        
        ' Retrieve all the subkeys for the specified key.
        Dim names As String() = rkey.GetSubKeyNames()
        
        Dim icount As Integer = 0
        
        Console.WriteLine("Subkeys of " & rkey.Name)
        Console.WriteLine("-----------------------------------------------")
        
        ' Print the contents of the array to the console.
        Dim s As String
        For Each s In  names
            Console.WriteLine(s)
            
            ' The following code puts a limit on the number
            ' of keys displayed.  Comment it out to print the
            ' complete list.
            icount += 1            
            If icount >= 10 Then
                Exit For
            End If
        Next s
    End Sub
End Class

Remarks

Les applications conventionnelles et les applications OLE utilisent des données stockées sous cette clé.Both conventional applications and OLE applications use data that is stored under this key. Cette clé fournit également une compatibilité descendante avec la base de données d’inscription de Windows 3,1 en stockant des informations pour la prise en charge de DDE et OLE.This key also provides backward compatibility with the Windows 3.1 registration database by storing information for DDE and OLE support. Les visionneuses de fichiers et les extensions d’interface utilisateur stockent leurs identificateurs de classe OLE dans cette clé, et les serveurs de traitement sont inscrits dans cette clé.File viewers and user interface extensions store their OLE class identifiers in this key, and processing servers are registered in this key.

Applies to