asp.net - ASP.net 中的全局 OnLoggedOut 事件？

Question

当用户从 ASP.net 网站注销时是否可以收到通知？

Note: A user can become logged out without visiting or clicking a "logout" link.

当用户注销时，我想获取清除一些 session 相关信息，并写入数据库。

Note: There is the LoginStatus.OnLoggedOut event. Problem is that that control doesn't exist on every page, nor does the user have to use a LoginStatus control in order to logout (e.g.when the login times out, or the user is logged out)

与 Global.asax 具有全局 session 停止通知的方式相同:

void Session_End(object sender, EventArgs e) 
{
}

我假设某处有“用户注销”通知:

void LoggedOut(object sender, EventArgs e)
{
}

奖励阅读

• FormsAuthentication.SignOut Method
• LoginStatus.OnLoggedOut Method

Answer 1

我不同意。有时您想知道用户何时注销。例如，我有一个应用程序需要扫描所有登录的用户，以查看管理层是否有“任何人在家”。有时，经理可能正在浏览网站，但并未实际登录。他们的 session 可能仍处于事件状态，因为经理最近已注销，但仍在网站上浏览，而软件需要知道这一点。

在本例中，我制作了 HttpRuntime.Cache 逻辑来捕获登录事件和数据，包括用户名和 IP 地址、用户名等。此方法在以下位置调用:

public static void Application_AuthenticateRequest(对象发送者，EventArgs e)

然后，我使用该数据执行逻辑，计算登录状态和其他有用的应用程序详细信息。

以下内容很快且未经测试，但如果您问此类问题，我相信您可以清理它:)。我希望它有帮助。

 public static void HandleUserLoginLogic()
    {
        string UserName = HttpContext.Current.User.Identity.Name.ToString();
        if (UserName != null)
        {
            // if the user has logged in but we have not performed logic, do it now
            if (HttpRuntime.Cache["Authenticated_" + UserName] == null)
            {
                // absolutely confirm the user has logged in
                if (UsrMan.IsUserLoggedIn())
                {
                    // SETUP MY RUNTIME VARIABLES NOW
                    HttpRuntime.Cache["AuthenticatedIPAddress_" + System.Web.HttpContext.Current.Request.UserHostAddress] = UserName;
                    HttpRuntime.Cache["Authenticated_" + UserName] = true;
                    String[] roles = UsrMan.GetRolesForUser(UserName);
                    // handle roles for this user for future application uses in the future.
                    foreach (string role in roles)
                    {
                        // handle first time condition
                        if (HttpRuntime.Cache["AuthenticatedUserInRole_" + role] != null)
                        {
                            StringCollection scUserRole = (StringCollection)HttpRuntime.Cache["AuthenticatedUserInRole_" + role];
                            if (!scUserRole.Contains(UserName))
                            {
                                scUserRole.Add(UserName);
                                HttpRuntime.Cache["AuthenticatedUserInRole_" + role] = scUserRole;
                            }
                        }
                        // handle standard condition
                        else
                        {
                            StringCollection scUserRole = new StringCollection();
                            scUserRole.Add(UserName);
                            HttpRuntime.Cache["AuthenticatedUserInRole_" + role] = scUserRole;
                        }
                    }
                }
            }
        }

        // HANDLE LOGGED OUT CONDITION
        if ((HttpRuntime.Cache["AuthenticatedIPAddress_" + System.Web.HttpContext.Current.Request.UserHostAddress] != null) && (UserName == null))
        {
            string OldUserName = HttpRuntime.Cache["AuthenticatedIPAddress_" + System.Web.HttpContext.Current.Request.UserHostAddress].ToString();
            HttpRuntime.Cache["Authenticated_" + OldUserName] = null;
            String[] roles = UsrMan.GetRolesForUser(UserName);
            foreach (string role in roles)
            {
                StringCollection scUserRole = (StringCollection)HttpRuntime.Cache["AuthenticatedUserInRole_" + role];
                scUserRole.Remove(UserName);
                if (scUserRole.Count > 0)
                    HttpRuntime.Cache["AuthenticatedUserInRole_" + role] = scUserRole;
                else
                    HttpRuntime.Cache["AuthenticatedUserInRole_" + role] = null;
            }
        }
    }
    public static bool IsUserLoggedIn()
    {
        bool result = false;
        if (HttpContext.Current.User != null &&
      HttpContext.Current.User.Identity != null
          && HttpContext.Current.User.Identity.IsAuthenticated)
        { result = true; }
        return result;
    }