IAuthenticationModule.PreAuthenticate(WebRequest, ICredentials) 方法

定義

命名空間:

System.Net

組件:

System.Net.Requests.dll

傳回驗證要求的 Authorization 類別的執行個體至伺服器。

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

參數

request

WebRequest

與驗證要求相關的 WebRequest 執行個體。

credentials

ICredentials

與驗證要求相關的認證。

傳回

Authorization

Authorization 執行個體，含有要求的授權訊息。

範例

下列範例會示範如何使用 PreAuthenticate 方法。 如需完整的範例，請參閱 類別 AuthenticationManager 。

// 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

備註

CanPreAuthenticate當 屬性為 true時，PreAuthenticate方法會傳回類別的實例，Authorization其中包含驗證訊息。