How to Count No of Visitors in ASP.NET Using C#?

Add a Global.asax file which interacts with the entire application. Global.asax is a page containg session level and application level events, this is also called an application file.

The sample code is given below:

Global.asax

<%@ Application Language="C#" %>

<script runat="server">

    public static int count = 0;

    void Application_Start(object sender, EventArgs e)

    {

        Application["Visitor"] = count;

        // Code that runs on application startup

    }

   

    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

        count = Convert.ToInt32(Application["Visitor"]);

        Application["Visitor"] = 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 “count “  start from 0 (zero)  but as it goes on the Application[“Visitor”] and “count” increase 1 (one) and hold the value 1 (one).

Default.aspx

 

Default.aspx.cs

(Write the below code in to code behind page or .cs file)

using System;

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;

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

{

    protected void Page_Load(object sender, EventArgs e)

    {

        int a;

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

        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: