Using httpmoduler to implement a web program at the same time, only one user instance logs in

/ * Author: bull (cow Queensland light) QQ: 273352165 MSN: niukl@hotmail.com statement: free to use, please keep this information if you have any change, remember to tell me * /!

When I use the ASP.NET to develop a web site, sometimes it does not let the same user name to log in multiple times at the same time.

In order not to affect the original whole site, I chose to use HttpModuler to implement.

Let all Page first inherited from our own Page: BasePage class and implement IsigLogin interface. The relevant code is as follows:

public

Interface

IsingLogin

{String sigleuserloginid {get;} void sigleuserlogout ();

public

Class

Basepage: System.Web.ui.page, BNET.WEB.MODULERS.ISINGLOGIN

{Public BasePage () {// // Todo: Add Constructor Logic //} Protected Override Void OnLoad (Eventargs E) {Base.onLoad (E); IF (session ["UserID"] == NULL) {Response.write ("You haven't logged in"); Response.Redirect ("login.aspx");}}}}}}}}}} ISINGINEN Member #Region ISINGLOGIN Member Public String SigleUserLoginid {Get {IF (Session ["UserID"]! = Null) {RETURN session ["userid"]. TOSTRING ();} else Return "";}} public void sigleuserlogout () {session.abandon (); response.write ("You have already logged over elsewaters! ");} #Endregion}

Then add httpmoduler in Web.config:

<

SYSTEM

.web

>

<

Httpmodules

>

<

Add

Name

= "Singlelogin"

Type

= "BNET.WEB.MODULERS.SINGLOGINMODULER"

/>

Httpmodules

>

System.Web

>

The relevant SIGLOGINMODULER code is as follows:

Using

System;

Using

System.collections.Generic;

Using

System.data;

Using

System.configuration;

Using

System.Web;

Using

System.Web.ui;

Namespace

BNET.WEB.MODULERS

{/ ** ////