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Session in ASP.Net


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Session in ASP.Net

In this article, I’m trying to explain the concept of session in asp.net

As we all know, HTTP is a stateless protocol, it can't hold client information on a page. If the user inserts some information and move to the next page, that data will be lost and the user would not be able to retrieve that information. Session provides a facility to store information on server memory. It can support any type of object to store along with our own custom objects. For every client, session data is stored separately, which means session data is stored on a per client basis.

ASP.NET session state enables you to store and retrieve values for a user as the user navigates ASP.NET pages in a Web application. ASP.NET session state identifies requests from the same browser during a limited time window as a session, and provides a way to persist variable values for the duration of that session.

Advantages of Session:-

  1. It helps maintain user state and data all over the application.
  2. It is easy to implement and we can store any kind of object.
  3. Stores client data separately.
  4. Session is secure and transparent from the user.

Example:-

Step 1:-

Design the form as shown below:-

Session in ASP.Net

Step 2:-

Write the code in the webform1.aspx.cs

using System;

 

namespace SessionWebApplication

{

    public partial class WebForm1 : System.Web.UI.Page

    {

        protectedvoid Page_Load(objectsender, EventArgse)

        {

 

        }

 

        protectedvoid btnSave_Click(objectsender, EventArgse)

        {

            //storing data in Session variable name and city

            Session["Name"] =txtName.Text;

            Session["City"] =txtCity.Text;

 

            txtName.Text="";

            txtCity.Text="";

            lblMsg.Text="Data saved in session";

 

        }

    }

}

 

Step 3:-

Webform2.aspx

    <div>

        <asp:Label ID="lblName"runat="server"></asp:Label>

        <br/>

        <asp:Label ID="lblCity"runat="server"></asp:Label>

        <br/>

        <br/>

        <asp:HyperLink ID="HyperLink1" runat="server"NavigateUrl="~/WebForm1.aspx">Back</asp:HyperLink>

    </div>

 

 

 

 

Step 4:-

Write code in webform2.aspx.cs

using System;

 

namespace SessionWebApplication

{

    public partial class WebForm2 : System.Web.UI.Page

    {

        protectedvoid Page_Load(objectsender, EventArgse)

        {

            //retrieving data from session variable name and city

            lblName.Text="Hi "+Session["Name"].ToString();

            lblCity.Text="You live in "+Session["City"].ToString();

        }

    }

}

 

 

Step 5:-

Run the application

Session in ASP.Net

After filling values in the textboxes click on the save to session button

Session in ASP.Net

You will get a message that data saved in session and then click on Test Session

Session in ASP.Net

You will be redirect to webform2.aspx and get the message like this.

 


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