Login.OnAuthenticate(AuthenticateEventArgs) Login.OnAuthenticate(AuthenticateEventArgs) Login.OnAuthenticate(AuthenticateEventArgs) Login.OnAuthenticate(AuthenticateEventArgs) Method

定义

引发 Authenticate 事件以验证用户身份。Raises the Authenticate event to authenticate the user.

protected:
 virtual void OnAuthenticate(System::Web::UI::WebControls::AuthenticateEventArgs ^ e);
protected virtual void OnAuthenticate (System.Web.UI.WebControls.AuthenticateEventArgs e);
abstract member OnAuthenticate : System.Web.UI.WebControls.AuthenticateEventArgs -> unit
override this.OnAuthenticate : System.Web.UI.WebControls.AuthenticateEventArgs -> unit
Protected Overridable Sub OnAuthenticate (e As AuthenticateEventArgs)

参数

示例

下面的代码示例使用Authenticate事件来调用特定于站点的自定义身份验证代码。The following code example uses the Authenticate event to call site-specific custom authentication code.

<%@ page language="C#"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
    // This custom login control overloads the OnAuthenticate method
    // to call a site-specific authentication method.    
    class CustomLogin : Login
    {
        private bool SiteSpecificAuthenticationMethod(string UserName, string Password)
        {
            // Insert code that implements a site-specific custom 
            // authentication method here.
            //
            // This example implementation always returns false.
            return false;
        }
        
        override protected void OnAuthenticate(AuthenticateEventArgs e)
        {
            bool Authenticated = false;
            Authenticated = SiteSpecificAuthenticationMethod(UserName, Password);

            e.Authenticated = Authenticated;
        }
    }
    
    // Add the custom login control to the page.
    void Page_Load(object sender, EventArgs e) 
    {
        CustomLogin loginControl = new CustomLogin();
        loginControl.ID = "loginControl";
        Placeholder1.Controls.Add(loginControl);
    }

</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
    <head runat="server">
    <title>ASP.NET Example</title>
</head>
<body>
        <form id="form1" runat="server">
            <asp:placeholder id="Placeholder1" runat="server"></asp:placeholder>
        </form>
    </body>
</html>
<%@ page language="VB" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
    ' This custom login control overloads the OnAuthenticate method
    ' to call a site-specific authentication method.
    Class CustomLogin
        Inherits Login
        
        Private Function SiteSpecificAuthenticationMethod(ByVal UserName As String, ByVal Password As String) As Boolean
            ' Insert code that implements a site-specific custom 
            ' authentication method here.
            '
            ' This example implementation always returns false.
            Return False
        End Function
    
        Overloads Sub OnAuthenticate(ByVal e As AuthenticateEventArgs)
            Dim Authenticated As Boolean
            Authenticated = SiteSpecificAuthenticationMethod(UserName, Password)

            e.Authenticated = Authenticated
        End Sub
    End Class
    
    ' Add the custom login control to the page.
    Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
        Dim loginControl As New CustomLogin

        loginControl.ID = "loginControl"

        PlaceHolder1.Controls.Add(loginControl)
    End Sub

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>ASP.NET Example</title>
</head>
<body>
<form id="form1" runat="server">
    <asp:placeholder id="PlaceHolder1" runat="server"></asp:placeholder>

</form>
</body>
</html>

注解

OnAuthenticate 方法引发 Authenticate 事件。The OnAuthenticate method raises the Authenticate event. Authenticate使用事件可实现自定义身份验证方案。Use the Authenticate event to implement a custom authentication scheme.

引发事件时,将通过委托调用事件处理程序。Raising an event invokes the event handler through a delegate. 有关详细信息, 请参阅处理和引发事件For more information, see Handling and Raising Events.

OnAuthenticate 方法还允许派生类对事件进行处理而不必附加委托。The OnAuthenticate method also allows derived classes to handle the event without attaching a delegate. 这是在派生类中处理事件的首选技术。This is the preferred technique for handling the event in a derived class.

继承者说明

在派生类中重写 OnAuthenticate(AuthenticateEventArgs) 时,一定要调用基类的 OnAuthenticate(AuthenticateEventArgs) 方法,以便已注册的委托对事件进行接收。When overriding OnAuthenticate(AuthenticateEventArgs) in a derived class, be sure to call the base class's OnAuthenticate(AuthenticateEventArgs) method so that registered delegates receive the event.

适用于

另请参阅