AuthenticationService.Authenticating Event
.NET Framework (current version)
Occurs when user credentials are being validated.
Assembly: System.Web.Extensions (in System.Web.Extensions.dll)
The Authenticating event is raised when user credentials are being validated. Create an event handler for the Authenticating event to customize how user credentials are validated.
The following example shows how to bind an event handler for the Authenticating event in the Application_Start method of the Global.asax file.
Sub Application_Start(ByVal sender As Object, ByVal e As EventArgs) AddHandler System.Web.ApplicationServices.AuthenticationService.Authenticating, _ AddressOf Me.AuthenticationService_Authenticating End Sub
The following example shows an event handler for the Authenticating event in the Global.asax file. The event handler reads two authentication values from the CustomCredential property and passes them together with the user name and password to a custom authentication class named StudentAuthentication.
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
.NET Framework
Available since 3.5
Available since 3.5
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