AuthenticationService.Authenticating Evento

public:
 static event EventHandler<System::Web::ApplicationServices::AuthenticatingEventArgs ^> ^ Authenticating;

public static event EventHandler<System.Web.ApplicationServices.AuthenticatingEventArgs> Authenticating;

member this.Authenticating : EventHandler<System.Web.ApplicationServices.AuthenticatingEventArgs> 

Public Shared Custom Event Authenticating As EventHandler(Of AuthenticatingEventArgs) 

Tipo de Evento

Exemplos

O exemplo seguinte mostra como associar um gestor de eventos para o Authenticating evento no Application_Start método do ficheiro Global.asax.

void Application_Start(object sender, EventArgs e) 
{
    System.Web.ApplicationServices.AuthenticationService.Authenticating += 
        new EventHandler<System.Web.ApplicationServices.AuthenticatingEventArgs>(AuthenticationService_Authenticating);

}

Sub Application_Start(ByVal sender As Object, ByVal e As EventArgs)
    AddHandler System.Web.ApplicationServices.AuthenticationService.Authenticating, _
      AddressOf Me.AuthenticationService_Authenticating
End Sub

O exemplo seguinte mostra um gestor de eventos para o Authenticating evento no ficheiro Global.asax. O gestor de eventos lê dois valores de autenticação da CustomCredential propriedade e passa-os juntamente com o nome de utilizador e a palavra-passe para uma classe de autenticação personalizada chamada StudentAuthentication.

void AuthenticationService_Authenticating(object sender, System.Web.ApplicationServices.AuthenticatingEventArgs e)
{
    string studentid = String.Empty;
    string answer = String.Empty;

    string[] credentials =
        e.CustomCredential.Split(new char[] { ',' });
    if (credentials.Length > 0)
    {
        studentid = credentials[0];
        if (credentials.Length > 1)
        {
            answer = credentials[1];
        }
    }

    try
    {
        e.Authenticated =
            StudentAuthentication.ValidateStudentCredentials
            (e.UserName, e.Password, studentid, answer);
    }
    catch (ArgumentNullException ex)
    {
        e.Authenticated = false;
    }

    e.AuthenticationIsComplete = true;
}

Sub AuthenticationService_Authenticating _
   (ByVal sender As Object, _
    ByVal e As System.Web.ApplicationServices.AuthenticatingEventArgs)
    Dim studentid As String = String.Empty
    Dim answer As String = String.Empty

    Dim credentials As String() = _
         e.CustomCredential.Split(New Char() {","c})
    If (credentials.Length > 0) Then
        studentid = credentials(0)
        If (credentials.Length > 1) Then
            answer = credentials(1)
        End If
    End If

    Try
        e.Authenticated = _
            StudentAuthentication.ValidateStudentCredentials _
            (e.Username, e.Password, studentid, answer)
    Catch ex As ArgumentNullException
        e.Authenticated = False
    End Try
    

    e.AuthenticationIsComplete = True
End Sub

Observações

O Authenticating evento é ativado quando as credenciais dos utilizadores estão a ser validadas. Crie um gestor de eventos para o Authenticating evento para personalizar a forma como as credenciais dos utilizadores são validadas.

Ver também

• AuthenticatingEventArgs
• Windows Communication Foundation Visão Geral do Serviço de Autenticação