How to Count number of times website visited and online users in asp.net using C# and VB.Net

Introduction: In this article i will explain with example How to count the number of times the website is visited by the visitors/users and the users currently online on the website.

Steps to Follow:

1.        First of all we need to add global.asax file.

2. Open the global.aspx file and write the code on the Application_Start, Session_Start and the Session_End event as:

void Application_Start(object sender, EventArgs e)

    {

        // Code that runs on application startup

        Application["SiteVisitedCounter"] = 0;

        //to check how many users have currently used our site

        Application["OnlineUserCounter"] = 0;

    }

   void Session_Start(object sender, EventArgs e)

    {

        // Code that runs when a new session is started

        Application.Lock();

        Application["SiteVisitedCounter"] = Convert.ToInt32(Application["SiteVisitedCounter"]) + 1;

        //to check how many users have currently opened our site write the following line

        Application["OnlineUserCounter"] = Convert.ToInt32(Application["OnlineUserCounter"]) + 1;

        Application.UnLock();

    }

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.

        Application.Lock();

        Application["OnlineUserCounter"] = Convert.ToInt32(Application["OnlineUserCounter"]) - 1;

        Application.UnLock();

    }

Design Section:

<div>

    <fieldset style ="width:220px;">

    <legend>Count site visited and Online users</legend>   

        <asp:Label ID="lblSiteVisited" runat="server" Text=""

            style="color: #FFFFFF; background-color: #3366FF"></asp:Label><br />

        <asp:Label ID="lblOnlineUsers" runat="server" Text=""

            style="color: #FFFFFF; background-color: #009933"></asp:Label><br />

       

        <asp:Button ID="btnClearSesson" runat="server" Text="Clear Session"

            onclick="btnClearSesson_Click" />

        </fieldset>

        </div>

C#.Net code

• In the code behind file(default.aspx.cs) write the code as:

protected void Page_Load(object sender, EventArgs e)

    {

        lblSiteVisited.Text = "No of times site visited=" + Application["SiteVisitedCounter"].ToString();       

        lblOnlineUsers.Text = "No of users online on the site=" + Application["OnlineUserCounter"].ToString();

    }

    protected void btnClearSesson_Click(object sender, EventArgs e)

    {

        Session.Abandon();

    }

VB.Net Code

Design the page same as described in the Source code section above but replace the line        <asp:Button ID="btnClearSesson" runat="server" Text="Clear Session"    onclick="btnClearSesson_Click" />

with

         <asp:Button ID="btnClearSesson" runat="server" Text="Clear Session" /> 

Then In the code behind file(default.aspx.vb) write the code as:

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

        lblSiteVisited.Text = "No of times site visited=" & Application("SiteVisitedCounter").ToString()

        lblOnlineUsers.Text = "No of users online on the site=" & Application("OnlineUserCounter").ToString()

    End Sub

Protected Sub btnClearSesson_Click(ByVal sender As Object, ByVal e As System.EventArgs) HandlesbtnClearSesson.Click

        Session.Abandon()

    End Sub