Create recent unique visitor number in ASP.NET using C#

To get the recent user number in ASP.Net using c# follow the below steps.

1. Add a Global.asax page, Global.asax is a page containg session level and application level events, this is also called an application file.
   
   Write the below code in to your Global.asax page
   
   <%@ Application Language="C#" %> 
   <script runat="server">
       public static int u_count = 0;
       void Application_Start(object sender, EventArgs e)
       {
           // Code that runs on application startup
           Application["user_Count"] = u_count; 
       }   
       void Application_End(object sender, EventArgs e)
       {
           //  Code that runs on application shutdown
       }       
       void Application_Error(object sender, EventArgs e)
       {
           // Code that runs when an unhandled error occurs 
       } 
       void Session_Start(object sender, EventArgs e)
       {
           // Code that runs when a new session is started
           u_count = Convert.ToInt32(Application["user_Count"]); Application["user_Count"] = u_count + 1; 
       } 
       void Session_End(object sender, EventArgs e)
       {
           // Code that runs when a session ends.
           // Note: The Session_End event is raised only when the sessionstate mode
           // is set to InProc in the Web.config file. If session mode is set to StateServer
           // or SQLServer, the event is not raised.         
       }
   </script>
   
   In above code “u_count “ ll start from zero but as it goes on the “user_count” and “u_count” ll increase one and ll hold the value “1”.
    
2. Write the below code in to code behind page or .cs file
    

   using System;

   using System.Collections.Generic;

   using System.Linq;

   using System.Web;

   using System.Web.UI;

   using System.Web.UI.WebControls;

   using System.Globalization; 

   public partial class Default2 : System.Web.UI.Page

   {

       protected void Page_Load(object sender, EventArgs e)

       {

           int a;

           a = Convert.ToInt32((Application["user_Count"]));

           Label1.Text = Convert.ToString(a);

           if (a < 10)

               Label1.Text = "000" + Label1.Text;

           else if (a < 100)

               Label1.Text = "00" + Label1.Text;

           else if (a < 1000)

               Label1.Text = "0" + Label1.Text;      
       }
   }

Output