IAuthenticationModule.PreAuthenticate(WebRequest, ICredentials) Method

Reference

Definition

Namespace:: System.Net

Assemblies:: netstandard.dll, System.Net.Requests.dll

Assembly:: System.Net.Requests.dll

Assembly:: System.dll

Assembly:: netstandard.dll

Important

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

public:
 System::Net::Authorization ^ PreAuthenticate(System::Net::WebRequest ^ request, System::Net::ICredentials ^ credentials);

public System.Net.Authorization? PreAuthenticate(System.Net.WebRequest request, System.Net.ICredentials credentials);

public System.Net.Authorization PreAuthenticate(System.Net.WebRequest request, System.Net.ICredentials credentials);

abstract member PreAuthenticate : System.Net.WebRequest * System.Net.ICredentials -> System.Net.Authorization

Public Function PreAuthenticate (request As WebRequest, credentials As ICredentials) As Authorization

Parameters

request: WebRequest

The WebRequest instance associated with the authentication request.

credentials: ICredentials

The credentials associated with the authentication request.

Returns

Authorization

An Authorization instance containing the authorization message for the request.

Examples

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

// The PreAuthenticate method specifies if 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 implemebtation.
// In this case it always returns null.
virtual Authorization^ PreAuthenticate( WebRequest^ request, ICredentials^ credentials )
{
   return nullptr;
}

// 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 Function PreAuthenticate(ByVal request As WebRequest, ByVal credentials As ICredentials) As Authorization _
    Implements IAuthenticationModule.PreAuthenticate

  Return Nothing
End Function 'PreAuthenticate

Remarks

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

Applies to

Produkt	Versioner
.NET	Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	2.0, 2.1

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