"ASP." Scheduled Task execution

Principle: Use the Global Application class Global.asax and System.Timers.Timer classes to process tasks on a timed basis.

Example:

The Global.asax class code is as follows:

usingSystem;usingSystem.Collections.Generic;usingSystem.IO;usingSystem.Linq;usingSystem.Net;usingSystem.Threading;usingsystem.timers;usingsystem.web;usingSystem.Web.Security;usingSystem.Web.SessionState;namespacetimingtask{/** * Principle: Global.asax can be an application or Session event handler in ASP. * We use Application_Start (Application start Event) and Application_End (Application End event).     * When the application starts, start a timer to execute the task Yourtask () method, * This method can write the logic code that needs to be called, can be single thread and multithreading.     * When the application ends, such as IIS's application pool recycling, let ASP. NET to access the current web address.      * There is a need to access an ASPX page so that you can reactivate the application. */     Public classGlobal:System.Web.HttpApplication {//code to run when the application starts        protected voidApplication_Start (Objectsender, EventArgs e) {            //TimerSystem.Timers.Timer MyTimer =NewSystem.Timers.Timer ( -); Mytimer.elapsed+=NewElapsedeventhandler (mytimer_elapsed); Mytimer.enabled=true; Mytimer.autoreset=true; }        Private voidMytimer_elapsed (Objectsource, Elapsedeventargs E) {            Try{runthetask (); }            Catch(Exception ex) {webform1.html=Ex.            Message; }        }        Private voidRunthetask () {//write the tasks you need to perform here.webform1.html = DateTime.Now.ToString ("YYYY-MM-DD HH:mm:ss") +": Autotask is working!"; }        //code to run when a new session is started        protected voidSession_Start (Objectsender, EventArgs e) {        }        protected voidApplication_BeginRequest (Objectsender, EventArgs e) {        }        protected voidApplication_AuthenticateRequest (Objectsender, EventArgs e) {        }        //code to run when an unhandled error occurs        protected voidApplication_Error (Objectsender, EventArgs e) {        }        //The code that runs at the end of the session.         protected voidSession_End (Objectsender, EventArgs e) {            //Note: Only the sessionstate mode in the Web. config file is set to//InProc, the Session_End event is not raised. If the session mode is set to StateServer//or SQL Server, the event is not raised        }        //code to run when the application shuts down        protected voidApplication_End (Objectsender, EventArgs e) {webform1.html= DateTime.Now.ToString ("YYYY-MM-DD HH:mm:ss") +": Application end!"; //The following code is critical to resolve an issue with automatic collection of IIS application poolsThread.Sleep ( +); //Set your web address here and you can point to any of your ASPX pages or even nonexistent pages to inspire Application_Start            stringURL ="WebForm1.aspx"; HttpWebRequest myHttpWebRequest=(HttpWebRequest) webrequest.create (URL); HttpWebResponse Myhttpwebresponse=(HttpWebResponse) myhttpwebrequest.getresponse (); Stream Receivestream= Myhttpwebresponse.getresponsestream ();//get write-back byte stream        }    }}

Then use the WebForm page to output the timing effect:

usingSystem;usingSystem.Collections.Generic;usingSystem.Linq;usingsystem.web;usingSystem.Web.UI;usingSystem.Web.UI.WebControls;namespacetimingtask{ Public Partial classWebForm1:System.Web.UI.Page { Public StaticString HTML =""; protected voidPage_Load (Objectsender, EventArgs e) {            if(!IsPostBack)            {Getdatabind (); }        }        Private voidGetdatabind () { for(inti =0; I <Ten; i++) {System.Threading.Thread.Sleep ( +); Response.Write (HTML+"<br/>"); }        }    }}

"ASP." Scheduled Task execution