State Management

Question

Hi,

I am having a problem in understanding the below code.

it is a task regarding performiong crud operations with out using Data base  with help of collections.

 

i am not able to understand How  session is  having the values despite not assaigning values to session.

 

 

 

Thank you in advance 

 

class Employee

{

public int eid { get; set; }

public string name { get; set; }

public decimal salary { get; set; }

}

 

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

{

Employee obj = new Employee();

List<Employee> el = new List<Employee>();

protected void Page_Load(object sender, EventArgs e)

{

if(!Page.IsPostBack)

{

Session["emp"] = el;

}

el=(List<Employee>)Session["emp"];

}

protected void Button1_Click(object sender, EventArgs e)

{

obj.eid = int.Parse(TextBox1.Text);

obj.name = TextBox2.Text;

obj.salary = Convert.ToDecimal(TextBox3.Text);

el = (List<Employee>)Session["emp"];

el.Add(obj);

GridView1.DataSource = el.ToList();

GridView1.DataBind();

}

}