Cookie Example
In this example simply a cookie is used to store a user name, later used to retrieve and display in textbox.
Create a new web form
Copy the code below an past in file with .aspx extension
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="Cookie_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Label ID="Label_result" runat="server"></asp:Label>
<br />
</div>
<p>
<asp:Label ID="Label2" runat="server" Text="Name: "></asp:Label>
<asp:TextBox ID="TextBox_name" runat="server"></asp:TextBox>
<asp:Button ID="Button_create_cookie" runat="server"
onclick="Button_create_cookie_Click" Text="Create Cookie" />
</p>
</form>
</body>
</html>
Copy the following code in file with extension .aspx.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class Cookie_Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
HttpCookie cookie = Request.Cookies["Preferences"];
if (cookie == null)
{
Label_result.Text = "<b>Unknown Customer.</b><br /><br />";
}
else
{
Label_result.Text = "<b>Cookie Created.</b><br /><br />";
Label_result.Text += "welcome: " + cookie["Name"];
}
}
protected void Button_create_cookie_Click(object sender, EventArgs e)
{
// Check for a cookie, and only create a new one if
// one doesn't already exist.
HttpCookie cookie= Request.Cookies["Preferences"];
if (cookie == null)
{
cookie= new HttpCookie("Preferences");
}
cookie["Name"] = TextBox_name.Text;
cookie.Expires = DateTime.Now.AddYears(1);
Response.Cookies.Add(cookie);
Label_result.Text = "<b>Cookie Created.</b><br /><br />";
Label_result.Text += "New Customer: " + cookie["Name"];
}
}
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