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ASP.NET Session

In ASP.NET session is a state that is used to store and retrieve values of a user.

It helps to identify requests from the same browser during a time period (session). It is used to store value for the particular time session. By default, ASP.NET session state is enabled for all ASP.NET applications.

Each created session is stored in SessionStateItemCollection object. We can get current session value by using Session property of Page object. Let's see an example, how to create an access session in asp.net application.

ASP.NET Session Example

In the following example, we are creating a session and storing user email. This example contains the following files.

// Default.aspx

<%@ Page Title="Home Page" Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs"
Inherits="SessionExample._Default" %>
<head>
    <style type="text/css">
        .auto-style1 {
            width: 100%;
        }
        .auto-style2 {
            width: 105px;
        }
    </style>
</head>
<form id="form1" runat="server">
    <p>Provide Following Details</p>
    <table class="auto-style1">
        <tr>
            <td class="auto-style2">Email</td>
            <td>
                <asp:TextBox ID="email" runat="server" TextMode="Email"></asp:TextBox>
            </td>
        </tr>
        <tr>
            <td class="auto-style2">Password</td>
            <td>
                <asp:TextBox ID="password" runat="server" TextMode="Password"></asp:TextBox>
            </td>
        </tr>
        <tr>
            <td class="auto-style2"> </td>
            <td>
                <asp:Button ID="login" runat="server" Text="Login" OnClick="login_Click" />
            </td>
        </tr>
    </table>
    <br />
    <asp:Label ID="Label3" runat="server"></asp:Label>
    <br />
    <asp:Label ID="Label4" runat="server"></asp:Label>
</form>

Code

// Default.aspx.cs

using System;
using System.Web.UI;
namespace SessionExample
{
    public partial class _Default : Page
    {
        protected void login_Click(object sender, EventArgs e)
        {
            if (password.Text=="qwe123")
            {
                // Storing email to Session variable
                Session["email"] = email.Text;
            }
            // Checking Session variable is not empty
            if (Session["email"] != null)
            {
                // Displaying stored email
                Label3.Text = "This email is stored to the session.";
                Label4.Text = Session["email"].ToString();
            }
        }
    }
}

Output:

This application will store user email to the session when user login.

It will show stored session value, user email.

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