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IAuthenticationModule.PreAuthenticate Method

Returns an instance of the Authorization class for an authentication request to a server.

Namespace: System.Net
Assembly: System (in system.dll)

Authorization PreAuthenticate (
	WebRequest request,
	ICredentials credentials
)
Authorization PreAuthenticate (
	WebRequest request, 
	ICredentials credentials
)
function PreAuthenticate (
	request : WebRequest, 
	credentials : ICredentials
) : Authorization

Parameters

request

The WebRequest instance associated with the authentication request.

credentials

The credentials associated with the authentication request.

Return Value

An Authorization instance containing the authorization message for the request.

When the CanPreAuthenticate property is true, the PreAuthenticate method will return an instance of the Authorization class containing an authentication message.

The following example shows how to use the PreAuthenticate method. For a complete example refer to the AuthenticationManager class.

// The PreAuthenticate method specifies whether the authentication implemented 
// by this class allows pre-authentication. 
// Even if you do not use it, this method must be implemented to obey to the rules 
// of interface implementation.
// In this case it always returns null. 
public Authorization PreAuthenticate(WebRequest request, ICredentials credentials) 
{                
  return null;
}

// The PreAuthenticate method specifies whether the authentication 
// implemented  by this class allows pre-authentication. 
// Even if you do not use it, this method must be implemented to 
// obey to the rules of interface implementation.
// In this case it always returns null. 
public Authorization PreAuthenticate(WebRequest request, 
    ICredentials credentials)
{
    return null;
} //PreAuthenticate

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

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