ViewState for state management

 v ViewState :-

I. It is used to store data value in a single webpage.

II. The ViewState cannot transfer the  data between one page to another page .

v How to create ViewState?

Sytanx:- ViewState[“var”]=Control;

Ex.- ViewState[“Email”]=Textbox1.text;

 

v How to access ViewState data value?

Syntax:-control=ViewState[“var”].Tostring();

Ex:-Label1.text=ViewState[“Email”].tostring();

 

Code:-using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

 

namespace WebApplication1

{

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

    {

        protected void Page_Load(object sender, EventArgs e)

        {

 

        }

 

        protected void Button1_Click(object sender, EventArgs e)

        {

            // create viewstate

            ViewState["msg"] = TextBox1.Text;

 

            TextBox1.Text = "";

        }

 

        protected void Button2_Click(object sender, EventArgs e)

        {

            //access the ViewState

 

            Label1.Text = ViewState["msg"].ToString();

        }

    }

}

 

v COOKIES:-

I. Cookies is used to store pieces of information .

II. There are two type of implementation by which cookies can be used.

a. Create Cookies.

b. Expires Cookies.

A. Create Cookies:-

Syntax:- Response.Cookies[“var”].value=control;

Ex- Response.Cookies[“msg”].value=textbox1.text;

 

B. Expires Cookies:-

Syntax:- Response.Cookies[“var”].Expires=Datetime.now.AddMinutes(1);

 

Ex.-Response.Cookies[“msg”].Expires=Datetime.now.AddMinutes(2);

 

n  How to access Cookies?

Syntax:- Control=Request.Cookies[“var”].value;

 

Ex- label1.text=Request.Cookies[“email”].value;