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:-

Step 2:-

Write the code in the webform1.aspx.cs

using System;   namespace SessionWebApplication {     public partial class WebForm1 : System.Web.UI.Page     {         protected void Page_Load(object sender, EventArgs e)         {           }           protected void btnSave_Click(object sender, EventArgs e)         {             //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     {         protected void Page_Load(object sender, EventArgs e)         {             //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

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

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

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