AuthenticationService Class

Article
01/27/2012

[WCF RIA Services Version 1 Service Pack 2 is compatible with either .NET framework 4 or .NET Framework 4.5, and with either Silverlight 4 or Silverlight 5.]

Provides a base class for services that authenticate, load, and save the current user.

Inheritance Hierarchy

System.Object
System.ServiceModel.DomainServices.Client.ApplicationServices.AuthenticationService
System.ServiceModel.DomainServices.Client.ApplicationServices.WebAuthenticationService

Namespace: System.ServiceModel.DomainServices.Client.ApplicationServices
Assembly: System.ServiceModel.DomainServices.Client (in System.ServiceModel.DomainServices.Client.dll)

Syntax

'Declaration
Public MustInherit Class AuthenticationService _
    Implements INotifyPropertyChanged

'Usage
Dim instance As AuthenticationService

public abstract class AuthenticationService : INotifyPropertyChanged

public ref class AuthenticationService abstract : INotifyPropertyChanged

[<AbstractClassAttribute>]
type AuthenticationService =  
    class
        interface INotifyPropertyChanged
    end

public abstract class AuthenticationService implements INotifyPropertyChanged

The AuthenticationService type exposes the following members.

Constructors

	Name	Description
	AuthenticationService	Initializes a new instance of the AuthenticationService class.

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Properties

	Name	Description
	IsBusy	Gets a value indicating whether an asynchronous operation is in progress.
	IsLoadingUser	Gets a value indicating whether an asynchronous LoadUser operation is in progress.
	IsLoggingIn	Gets a value indicating whether an asynchronous Login operation is in progress.
	IsLoggingOut	Gets a value indicating whether an asynchronous Logout operation is in progress.
	IsSavingUser	Gets a value indicating whether an asynchronous SaveUser operation is in progress.
	SupportsCancellation	Gets a value indicating whether this authentication implementation supports cancellation.
	User	Gets a principal representing the authenticated user.

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Methods

	Name	Description
	BeginLoadUser	Begins an asynchronous LoadUser operation.
	BeginLogin	Begins an asynchronous Login operation.
	BeginLogout	Begins an asynchronous Logout operation.
	BeginSaveUser	Begins an asynchronous SaveUser operation.
	CancelLoadUser	Cancels an asynchronous LoadUser operation.
	CancelLogin	Cancels an asynchronous Login operation.
	CancelLogout	Cancels an asynchronous Logout operation.
	CancelSaveUser	Cancels an asynchronous SaveUser operation.
	CreateDefaultUser	Creates a default user.
	EndLoadUser	Ends an asynchronous LoadUser operation.
	EndLogin	Ends an asynchronous Login operation.
	EndLogout	Ends an asynchronous Logout operation.
	EndSaveUser	Ends an asynchronous SaveUser operation.
	Equals	(Inherited from Object.)
	Finalize	(Inherited from Object.)
	GetHashCode	(Inherited from Object.)
	GetType	(Inherited from Object.)
	LoadUser()	Asynchronously loads the authenticated user from the server.
	LoadUser(Action<LoadUserOperation>, Object)	Asynchronously loads the authenticated user from the server with specified callback method and user state.
	Login(LoginParameters)	Asynchronously authenticates and logs in to the server with the specified parameters.
	Login(String, String)	Asynchronously authenticates and logs in to the server with the specified user name and password.
	Login(LoginParameters, Action<LoginOperation>, Object)	Asynchronously authenticates and logs in to the server with the specified parameters, callback method, and user state.
	Logout(Boolean)	Asynchronously logs out an authenticated user from the server with the specified value indicating whether an exception is thrown for errors.
	Logout(Action<LogoutOperation>, Object)	Asynchronously logs out an authenticated user from the server with the specified callback method and user state.
	MemberwiseClone	(Inherited from Object.)
	OnPropertyChanged	Raises a PropertyChanged event.
	RaisePropertyChanged	Raises a PropertyChanged event for the specified property.
	SaveUser(Boolean)	Asynchronously saves the authenticated user to the server with the specified value indicating whether an exception is thrown for errors.
	SaveUser(Action<SaveUserOperation>, Object)	Asynchronously saves the authenticated user to the server with the specified callback method and user state.
	ToString	(Inherited from Object.)

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Events

	Name	Description
	LoggedIn	Occurs when a new user is successfully logged in.
	LoggedOut	Occurs when a user is successfully logged out.

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Explicit Interface Implementations

	Name	Description
	INotifyPropertyChanged.PropertyChanged	Occurs every time a property value changes.

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Remarks

This abstract base class exposes Login, Logout, LoadUser, and SaveUser as asynchronous operations. It also provides a number of properties that can be bound to, including IsBusy and User.

Implementations of this class will have a much different view by using several abstract template methods. These methods follow the asynchronous result pattern and are presented in Begin/End pairs for each operation. Optionally, cancel methods for each operation can also be implemented.

For a complete example of implementing an authentication service, see Walkthrough: Using Authentication Service with Silverlight Navigation Application.

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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