AppDomain Clase

Definición

public ref class AppDomain sealed : MarshalByRefObject

public ref class AppDomain : MarshalByRefObject

public ref class AppDomain sealed : MarshalByRefObject, _AppDomain, System::Security::IEvidenceFactory

public sealed class AppDomain : MarshalByRefObject

public class AppDomain : MarshalByRefObject

[System.Runtime.InteropServices.ClassInterface(System.Runtime.InteropServices.ClassInterfaceType.None)]
public sealed class AppDomain : MarshalByRefObject, _AppDomain, System.Security.IEvidenceFactory

[System.Runtime.InteropServices.ClassInterface(System.Runtime.InteropServices.ClassInterfaceType.None)]
[System.Runtime.InteropServices.ComVisible(true)]
public sealed class AppDomain : MarshalByRefObject, _AppDomain, System.Security.IEvidenceFactory

[System.Runtime.InteropServices.ClassInterface(System.Runtime.InteropServices.ClassInterfaceType.None)]
[System.Runtime.InteropServices.ComVisible(true)]
public sealed class AppDomain : MarshalByRefObject

type AppDomain = class
    inherit MarshalByRefObject

[<System.Runtime.InteropServices.ClassInterface(System.Runtime.InteropServices.ClassInterfaceType.None)>]
type AppDomain = class
    inherit MarshalByRefObject
    interface _AppDomain
    interface IEvidenceFactory

[<System.Runtime.InteropServices.ClassInterface(System.Runtime.InteropServices.ClassInterfaceType.None)>]
[<System.Runtime.InteropServices.ComVisible(true)>]
type AppDomain = class
    inherit MarshalByRefObject
    interface _AppDomain
    interface IEvidenceFactory

[<System.Runtime.InteropServices.ClassInterface(System.Runtime.InteropServices.ClassInterfaceType.None)>]
[<System.Runtime.InteropServices.ComVisible(true)>]
type AppDomain = class
    inherit MarshalByRefObject

Public NotInheritable Class AppDomain
Inherits MarshalByRefObject

Public Class AppDomain
Inherits MarshalByRefObject

Public NotInheritable Class AppDomain
Inherits MarshalByRefObject
Implements _AppDomain, IEvidenceFactory

Herencia

Object

MarshalByRefObject

AppDomain

Atributos

ClassInterfaceAttribute ComVisibleAttribute

Implementaciones

_AppDomain IEvidenceFactory

Ejemplos

En este ejemplo se muestra cómo crear un nuevo , crear una instancia AppDomainde un tipo en ese nuevo AppDomainy comunicarse con el objeto de ese tipo. Además, en este ejemplo se muestra cómo descargar el AppDomain objeto que provoca la recolección de elementos no utilizados.

using namespace System;
using namespace System::Reflection;
using namespace System::Threading;
using namespace System::Security::Policy;

// Because this class is derived from MarshalByRefObject, a proxy 
// to a MarshalByRefType object can be returned across an AppDomain 
// boundary.
ref class MarshalByRefType : MarshalByRefObject
{
public:
    //  Call this method via a proxy.
    void SomeMethod(String^ callingDomainName)
    {
        // Get this AppDomain's settings and display some of them.
        AppDomainSetup^ ads = AppDomain::CurrentDomain->SetupInformation;
        Console::WriteLine("AppName={0}, AppBase={1}, ConfigFile={2}", 
            ads->ApplicationName, 
            ads->ApplicationBase, 
            ads->ConfigurationFile
        );

        // Display the name of the calling AppDomain and the name 
        // of the second domain.
        // NOTE: The application's thread has transitioned between 
        // AppDomains.
        Console::WriteLine("Calling from '{0}' to '{1}'.", 
            callingDomainName, 
            Thread::GetDomain()->FriendlyName
        );
    };
};

void main()
{
    // Get and display the friendly name of the default AppDomain.
    String^ callingDomainName = Thread::GetDomain()->FriendlyName;
    Console::WriteLine(callingDomainName);

    // Get and display the full name of the EXE assembly.
    String^ exeAssembly = Assembly::GetEntryAssembly()->FullName;
    Console::WriteLine(exeAssembly);

    // Construct and initialize settings for a second AppDomain.
    AppDomainSetup^ ads = gcnew AppDomainSetup();
    ads->ApplicationBase = AppDomain::CurrentDomain->BaseDirectory;

    ads->DisallowBindingRedirects = false;
    ads->DisallowCodeDownload = true;
    ads->ConfigurationFile = 
        AppDomain::CurrentDomain->SetupInformation->ConfigurationFile;

    // Create the second AppDomain.
    AppDomain^ ad2 = AppDomain::CreateDomain("AD #2", 
        AppDomain::CurrentDomain->Evidence, ads);

    // Create an instance of MarshalbyRefType in the second AppDomain. 
    // A proxy to the object is returned.
    MarshalByRefType^ mbrt = 
        (MarshalByRefType^) ad2->CreateInstanceAndUnwrap(
            exeAssembly, 
            MarshalByRefType::typeid->FullName
        );

    // Call a method on the object via the proxy, passing the 
    // default AppDomain's friendly name in as a parameter.
    mbrt->SomeMethod(callingDomainName);

    // Unload the second AppDomain. This deletes its object and 
    // invalidates the proxy object.
    AppDomain::Unload(ad2);
    try
    {
        // Call the method again. Note that this time it fails 
        // because the second AppDomain was unloaded.
        mbrt->SomeMethod(callingDomainName);
        Console::WriteLine("Sucessful call.");
    }
    catch(AppDomainUnloadedException^)
    {
        Console::WriteLine("Failed call; this is expected.");
    }
}

/* This code produces output similar to the following: 

AppDomainX.exe
AppDomainX, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null
AppName=, AppBase=C:\AppDomain\bin, ConfigFile=C:\AppDomain\bin\AppDomainX.exe.config
Calling from 'AppDomainX.exe' to 'AD #2'.
Failed call; this is expected.
 */

using System;
using System.Reflection;
using System.Threading;

class Module1
{
    public static void Main()
    {
        // Get and display the friendly name of the default AppDomain.
        string callingDomainName = Thread.GetDomain().FriendlyName;
        Console.WriteLine(callingDomainName);

        // Get and display the full name of the EXE assembly.
        string exeAssembly = Assembly.GetEntryAssembly().FullName;
        Console.WriteLine(exeAssembly);

        // Construct and initialize settings for a second AppDomain.
        AppDomainSetup ads = new AppDomainSetup();
        ads.ApplicationBase = AppDomain.CurrentDomain.BaseDirectory;

        ads.DisallowBindingRedirects = false;
        ads.DisallowCodeDownload = true;
        ads.ConfigurationFile =
            AppDomain.CurrentDomain.SetupInformation.ConfigurationFile;

        // Create the second AppDomain.
        AppDomain ad2 = AppDomain.CreateDomain("AD #2", null, ads);

        // Create an instance of MarshalbyRefType in the second AppDomain.
        // A proxy to the object is returned.
        MarshalByRefType mbrt =
            (MarshalByRefType) ad2.CreateInstanceAndUnwrap(
                exeAssembly,
                typeof(MarshalByRefType).FullName
            );

        // Call a method on the object via the proxy, passing the
        // default AppDomain's friendly name in as a parameter.
        mbrt.SomeMethod(callingDomainName);

        // Unload the second AppDomain. This deletes its object and
        // invalidates the proxy object.
        AppDomain.Unload(ad2);
        try
        {
            // Call the method again. Note that this time it fails
            // because the second AppDomain was unloaded.
            mbrt.SomeMethod(callingDomainName);
            Console.WriteLine("Sucessful call.");
        }
        catch(AppDomainUnloadedException)
        {
            Console.WriteLine("Failed call; this is expected.");
        }
    }
}

// Because this class is derived from MarshalByRefObject, a proxy
// to a MarshalByRefType object can be returned across an AppDomain
// boundary.
public class MarshalByRefType : MarshalByRefObject
{
    //  Call this method via a proxy.
    public void SomeMethod(string callingDomainName)
    {
        // Get this AppDomain's settings and display some of them.
        AppDomainSetup ads = AppDomain.CurrentDomain.SetupInformation;
        Console.WriteLine("AppName={0}, AppBase={1}, ConfigFile={2}",
            ads.ApplicationName,
            ads.ApplicationBase,
            ads.ConfigurationFile
        );

        // Display the name of the calling AppDomain and the name
        // of the second domain.
        // NOTE: The application's thread has transitioned between
        // AppDomains.
        Console.WriteLine("Calling from '{0}' to '{1}'.",
            callingDomainName,
            Thread.GetDomain().FriendlyName
        );
    }
}

/* This code produces output similar to the following:

AppDomainX.exe
AppDomainX, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null
AppName=, AppBase=C:\AppDomain\bin, ConfigFile=C:\AppDomain\bin\AppDomainX.exe.config
Calling from 'AppDomainX.exe' to 'AD #2'.
Failed call; this is expected.
 */

open System
open System.Reflection
open System.Threading

// Because this class is derived from MarshalByRefObject, a proxy
// to a MarshalByRefType object can be returned across an AppDomain
// boundary.
type MarshalByRefType() =
    inherit MarshalByRefObject()
    
    //  Call this method via a proxy.
    member _.SomeMethod(callingDomainName) =
        // Get this AppDomain's settings and display some of them.
        let ads = AppDomain.CurrentDomain.SetupInformation
        printfn $"AppName={ads.ApplicationName}, AppBase={ads.ApplicationBase}, ConfigFile={ads.ConfigurationFile}"

        // Display the name of the calling AppDomain and the name
        // of the second domain.
        // NOTE: The application's thread has transitioned between
        // AppDomains.
        printfn $"Calling from '{callingDomainName}' to '{Thread.GetDomain().FriendlyName}'."

// Get and display the friendly name of the default AppDomain.
let callingDomainName = Thread.GetDomain().FriendlyName
printfn $"{callingDomainName}"

// Get and display the full name of the EXE assembly.
let exeAssembly = Assembly.GetEntryAssembly().FullName
printfn $"{exeAssembly}"

// Construct and initialize settings for a second AppDomain.
let ads = AppDomainSetup()
ads.ApplicationBase <- AppDomain.CurrentDomain.BaseDirectory

ads.DisallowBindingRedirects <- false
ads.DisallowCodeDownload <- true
ads.ConfigurationFile <-
    AppDomain.CurrentDomain.SetupInformation.ConfigurationFile

// Create the second AppDomain.
let ad2 = AppDomain.CreateDomain("AD #2", null, ads)

// Create an instance of MarshalbyRefType in the second AppDomain.
// A proxy to the object is returned.
let mbrt =
    ad2.CreateInstanceAndUnwrap(
        exeAssembly,
        typeof<MarshalByRefType>.FullName) :?> MarshalByRefType

// Call a method on the object via the proxy, passing the
// default AppDomain's friendly name in as a parameter.
mbrt.SomeMethod callingDomainName

// Unload the second AppDomain. This deletes its object and
// invalidates the proxy object.
AppDomain.Unload ad2
try
    // Call the method again. Note that this time it fails
    // because the second AppDomain was unloaded.
    mbrt.SomeMethod callingDomainName
    printfn "Sucessful call."
with :? AppDomainUnloadedException ->
    printfn "Failed call this is expected."

(* This code produces output similar to the following:

AppDomainX.exe
AppDomainX, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null
AppName=, AppBase=C:\AppDomain\bin, ConfigFile=C:\AppDomain\bin\AppDomainX.exe.config
Calling from 'AppDomainX.exe' to 'AD #2'.
Failed call this is expected.
 *)

Imports System.Reflection
Imports System.Threading

Module Module1
    Sub Main()

        ' Get and display the friendly name of the default AppDomain.
        Dim callingDomainName As String = Thread.GetDomain().FriendlyName
        Console.WriteLine(callingDomainName)

        ' Get and display the full name of the EXE assembly.
        Dim exeAssembly As String = [Assembly].GetEntryAssembly().FullName
        Console.WriteLine(exeAssembly)

        ' Construct and initialize settings for a second AppDomain.
        Dim ads As New AppDomainSetup()
        ads.ApplicationBase = AppDomain.CurrentDomain.BaseDirectory
        ads.DisallowBindingRedirects = False
        ads.DisallowCodeDownload = True
        ads.ConfigurationFile = _
            AppDomain.CurrentDomain.SetupInformation.ConfigurationFile

        ' Create the second AppDomain.
        Dim ad2 As AppDomain = AppDomain.CreateDomain("AD #2", Nothing, ads)

        ' Create an instance of MarshalbyRefType in the second AppDomain. 
        ' A proxy to the object is returned.
        Dim mbrt As MarshalByRefType = CType( _
            ad2.CreateInstanceAndUnwrap(exeAssembly, _
                 GetType(MarshalByRefType).FullName), MarshalByRefType)

        ' Call a method on the object via the proxy, passing the default 
        ' AppDomain's friendly name in as a parameter.
        mbrt.SomeMethod(callingDomainName)

        ' Unload the second AppDomain. This deletes its object and 
        ' invalidates the proxy object.
        AppDomain.Unload(ad2)
        Try
            ' Call the method again. Note that this time it fails because 
            ' the second AppDomain was unloaded.
            mbrt.SomeMethod(callingDomainName)
            Console.WriteLine("Sucessful call.")
        Catch e As AppDomainUnloadedException
            Console.WriteLine("Failed call; this is expected.")
        End Try

    End Sub
End Module

' Because this class is derived from MarshalByRefObject, a proxy 
' to a MarshalByRefType object can be returned across an AppDomain 
' boundary.
Public Class MarshalByRefType
    Inherits MarshalByRefObject

    '  Call this method via a proxy.
    Public Sub SomeMethod(ByVal callingDomainName As String)

        ' Get this AppDomain's settings and display some of them.
        Dim ads As AppDomainSetup = AppDomain.CurrentDomain.SetupInformation
        Console.WriteLine("AppName={0}, AppBase={1}, ConfigFile={2}", _
            ads.ApplicationName, ads.ApplicationBase, ads.ConfigurationFile)

        ' Display the name of the calling AppDomain and the name 
        ' of the second domain.
        ' NOTE: The application's thread has transitioned between 
        ' AppDomains.
        Console.WriteLine("Calling from '{0}' to '{1}'.", _
            callingDomainName, Thread.GetDomain().FriendlyName)
    End Sub
End Class

'This code produces output similar to the following:
' 
' AppDomainX.exe
' AppDomainX, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null
' AppName=, AppBase=C:\AppDomain\bin, ConfigFile=C:\AppDomain\bin\AppDomainX.exe.config
' Calling from 'AppDomainX.exe' to 'AD #2'.
' Failed call; this is expected.

Comentarios

Los dominios de aplicación, representados por AppDomain objetos, ayudan a proporcionar aislamiento, descarga y límites de seguridad para ejecutar código administrado.

• Use dominios de aplicación para aislar las tareas que podrían reducir un proceso. Si el estado de AppDomain que ejecuta una tarea se vuelve inestable, AppDomain se puede descargar sin afectar al proceso. Esto es importante cuando un proceso debe ejecutarse durante largos períodos sin reiniciarse. También puede usar dominios de aplicación para aislar las tareas que no deben compartir datos.

• Si un ensamblado se carga en el dominio de aplicación predeterminado, no se puede descargar de la memoria mientras se ejecuta el proceso. Sin embargo, si abre un segundo dominio de aplicación para cargar y ejecutar el ensamblado, el ensamblado se descarga cuando se descarga ese dominio de aplicación. Use esta técnica para minimizar el conjunto de trabajo de procesos de larga duración que ocasionalmente usan archivos DLL grandes.

Varios dominios de aplicación se pueden ejecutar en un único proceso; sin embargo, no hay una correlación uno a uno entre los dominios de aplicación y los subprocesos. Varios subprocesos pueden pertenecer a un único dominio de aplicación y, mientras que un subproceso determinado no se limita a un dominio de aplicación único, en un momento dado, un subproceso se ejecuta en un único dominio de aplicación.

Los dominios de aplicación se crean mediante el CreateDomain método . AppDomain Las instancias se usan para cargar y ejecutar ensamblados (Assembly). AppDomain Cuando ya no está en uso, se puede descargar.

La AppDomain clase implementa un conjunto de eventos que permiten a las aplicaciones responder cuando se carga un ensamblado, cuando se descarga un dominio de aplicación o cuando se produce una excepción no controlada.

Para obtener más información sobre el uso de dominios de aplicación, consulte Dominios de aplicación.

Esta clase implementa las MarshalByRefObjectinterfaces , _AppDomainy IEvidenceFactory .

Nunca debe crear un contenedor remoto para un AppDomain objeto . Si lo hace, podría publicar una referencia remota a ese AppDomain, exponiendo métodos como CreateInstance el acceso remoto y destruyendo eficazmente la seguridad de acceso al código para ese AppDomain. Los clientes malintencionados que se conectan al remoto AppDomain podrían obtener acceso a cualquier recurso al que tiene AppDomain acceso el propio . No cree contenedores remotos para ningún tipo que extienda MarshalByRefObject y que implemente métodos que podrían usar clientes malintencionados para omitir el sistema de seguridad.

Propiedades

Métodos

Eventos

Implementaciones de interfaz explícitas

Se aplica a

Consulte también

• Cómo: Configurar un dominio de aplicación
• Cómo: Crear un dominio de aplicación
• Procedimiento para cargar ensamblados en un dominio de aplicación
• Procedimiento para descargar un dominio de aplicación