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  • ASP.NET Multithreading

    @HIMANSHU
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    While developing a project in ASP.NET there are situations where you need to make your task multi-threaded to run in the background or in the foreground.

    For ex : If your application is sending notification after each day you need to create a thread for that it will work in the background.

    Life Cycle of a thread:

    The Unstarted State : In this state start method will not be called but the instance of the thread will be built.

    The Ready State : In this state the thread will be ready for execution and waiting for CPU cycle.

    • The Not Runnable State : a thread is not runnable, when:

      • Sleep method has been called
      • Wait method has been called
      • Blocked by I/O operations
        • The Dead State : It is a situation when the thread has already completed execution or it has been aborted.

     

    <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="threaddemo._Default" %>



<html  >

   <head runat="server">
      <title>
         Untitled Page
      </title>
   </head>
   
   <body>
      <form id="form1" runat="server">
         <div>
            <h3>Thread Example</h3>
         </div>
         
         <asp:Label ID="lblmessage" runat="server" Text="Label">
         </asp:Label>
      </form>
   </body>
   
</html>

     

     

    using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;

using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;

using System.Xml.Linq;
using System.Threading;

namespace threaddemo
{
   public partial class _Default : System.Web.UI.Page
   {
      protected void Page_Load(object sender, EventArgs e)
      {
         ThreadStart childthreat = new ThreadStart(childthreadcall);
         Response.Write("Child Thread Started <br/>");
         Thread child = new Thread(childthreat);
         
         child.Start();
         
         Response.Write("Main sleeping  for 2 seconds.......<br/>");
         Thread.Sleep(2000);
         Response.Write("<br/>Main aborting child thread<br/>");
         
         child.Abort();
      }
      
      public void childthreadcall()
      {
         try{
            lblmessage.Text = "<br />Child thread started <br/>";
            lblmessage.Text += "Child Thread: Coiunting to 10";
            
            for( int i =0; i<10; i++)
            {
               Thread.Sleep(500);
               lblmessage.Text += "<br/> in Child thread </br>";
            }
            
            lblmessage.Text += "<br/> child thread finished";
            
         }catch(ThreadAbortException e){
         
            lblmessage.Text += "<br /> child thread - exception";
            
         }finally{
            lblmessage.Text += "<br /> child thread - unable to catch the  exception";
         }
      }
   }
}
    .net
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