Editare

Partajați prin

Login.OnLoggedIn(EventArgs) Method

  • Reference

Definition

Namespace:
System.Web.UI.WebControls
Assembly:
System.Web.dll

Raises the LoggedIn event after the user logs in to the Web site and has been authenticated.

protected:
 virtual void OnLoggedIn(EventArgs ^ e);
protected virtual void OnLoggedIn (EventArgs e);
abstract member OnLoggedIn : EventArgs -> unit
override this.OnLoggedIn : EventArgs -> unit
Protected Overridable Sub OnLoggedIn (e As EventArgs)

Parameters

e
EventArgs

A EventArgs that contains the event data.

Examples

The following code example uses the LoggedIn event to call a site-specific method that keeps a record of user logins.

<%@ 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 uses a site-specific method
// to record the current date and time when users are 
// authenticated at the site.

class CustomLogin : Login
{
    private void SiteSpecificUserLoggingMethod(string UserName)
    {
        // Insert code to record the current date and time
        // when this user was authenticated at the site.
    }
    
    override protected void OnLoggedIn(EventArgs e)
    {
        SiteSpecificUserLoggingMethod(UserName);
    }
}
    // 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 uses a site-specific method
    ' to record the current date and time when users are 
    ' authenticated at the site.
    Class CustomLogin
        Inherits Login
        
        Private Sub SiteSpecificUserLoggingMethod(ByVal UserName As String)
            ' Insert code to record the current date and time
            ' when this user was authenticated at the site.
        End Sub
        
        Overrides Protected Sub OnLoggedIn(ByVal e As EventArgs)
            SiteSpecificUserLoggingMethod(UserName)
        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>

Remarks

The OnLoggedIn method raises the LoggedIn event. Use the LoggedIn event to provide additional processing, such as accessing per-user data, after the user is authenticated.

Raising an event invokes the event handler through a delegate. For more information, see Handling and Raising Events.

The OnLoggedIn method also allows derived classes to handle the event without attaching a delegate. This is the preferred technique for handling the event in a derived class.

Notes to Inheritors

When overriding OnLoggedIn(EventArgs) in a derived class, be sure to call the base class's OnLoggedIn(EventArgs) method so that registered delegates receive the event.

Applies to

See also