Cookies in ASP.NET (2024)

Cookies.zip

Type of Cookies

Persist Cookie - A cookie that doesn't have expired timeis called a Persist Cookie
Non-Persist Cookie - A cookie which has expired time is called a Non-Persist Cookie

How to create a cookie?

It is really easy to create a cookie in asp.net with the help of a Response object or HttpCookie.

Example 1

HttpCookieuserInfo=newHttpCookie("userInfo");userInfo["UserName"]="Annathurai";userInfo["UserColor"]="Black";userInfo.Expires.Add(newTimeSpan(0,1,0));Response.Cookies.Add(userInfo);

Example 2

Response.Cookies["userName"].Value="Annathurai";Response.Cookies["userColor"].Value="Black";

How to retrieve from cookie?

It is an easy way to retrieve cookie value from cookies with the help of Request object.

Example 1

stringUser_Name=string.Empty;stringUser_Color=string.Empty;User_Name=Request.Cookies["userName"].Value;User_Color=Request.Cookies["userColor"].Value;

Example 2

stringUser_name=string.Empty;stringUser_color=string.Empty;HttpCookiereqCookies=Request.Cookies["userInfo"];if(reqCookies!=null){User_name=reqCookies["UserName"].ToString();User_color=reqCookies["UserColor"].ToString();}

When we make a request from the client to web server, the web server processes the request and gives a lot of information with big pockets, which will have Header information, Metadata, cookies, etc., Then respose object can do all the things with browser.

Cookie's common property

Domain => This is used to associate cookies to domain.
Secure => We can enable secure cookie to set true(HTTPs).
Value => We can manipulate individual cookie.
Values => We can manipulate cookies with key/value pair.
Expires => This is used to set expire date for the cookies.

Advantages of Cookie

It has clear text so the user can read it.
We can store user preference information on the client machine.
It is an easy way to maintain.
Fast accessing.

Disadvantages of Cookie

If the user clears the cookie information, we can't get it back.
No security.
Each request will have cookie information with page.

How to clear the cookie information?

We can clear cookie information from client machine on cookie folder
To set expires to cookie object
```
userInfo.Expires=DateTime.Now.AddHours(1);
```
It will clear the cookie within one hour.

FAQs

How to set cookies in ASP.NET C#? ›

How to create a cookie?

HttpCookie userInfo = new HttpCookie("userInfo"); userInfo["UserName"] = "Annathurai"; userInfo["UserColor"] = "Black"; userInfo. Expires. ...
Response. Cookies["userName"]. ...
string User_Name = string. Empty; string User_Color = string. ...
string User_name = string. Empty; string User_color = string.

Nov 17, 2023

Does ASP.NET session use cookies? ›

asp file, ASP begins a new session using the same cookie. The only time a user receives a new SessionID cookie is when the server administrator restarts the server, thus clearing the SessionID settings stored in memory, or the user restarts the Web browser.

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What are cookies and types of cookies in C#? ›

What are cookies in C#?

Cookies are small units of information that follow all request processes and web pages as they travel between Web browsers and servers.
1). Persistent cookies.
2).Non-persistent cookies.

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What are cookies? ›

Cookies are small pieces of text sent to your browser by a website you visit. They help that website remember information about your visit, which can both make it easier to visit the site again and make the site more useful to you.

What is the difference between a cookie and a session? ›

The key difference between sessions and cookies is that sessions are saved on the server side while cookies are saved on the client side. Cookies are small text files used to store user information on the user's computer. Sessions are used to store user information on the user's server side.

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What are AspNetCore cookies? ›

AspNetCore. Cookies: Purpose: to store an authenticated user's details. Once a user logs in, ASP.Net Core encrypts this data and stores it in the cookie. The client passes this cookie back with each request.

What is cookies in asp net MVC? ›

A cookie is a text file stored in the computer's browser, which allows you to store and retrieve information on the client side. A web page instructs the browser to store information upon an initial visit, and when the user returns to the website the cookie is added to the HTTP header.

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What is the difference between session and cookies in .NET core? ›

Session is a server side object, which transfer or access data between page call. Cookies is a object which is client side/client machine which store some text information of browser and server.

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What is the difference between ASP.NET cookies and viewstate? ›

cookies are stored in client system and controlled by server side. View State are stored and controlled by server side.

How does ASP.NET handle error? ›

You can handle default errors and HTTP errors by adding a customErrors section to the Web. config file. The customErrors section allows you to specify a default page that users will be redirected to when an error occurs. It also allows you to specify individual pages for specific status code errors.

How to use cookies in classic ASP? ›

Creating an ASP cookie is exactly the same process as creating an ASP Session. Once again, you must create a key/value pair where the key will be the name of our "created cookie". The created cookie will store the value which contains the actual data.

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What is cookie with example? ›

Cookies are small files of information that a web server generates and sends to a web browser. Web browsers store the cookies they receive for a predetermined period of time, or for the length of a user's session on a website. They attach the relevant cookies to any future requests the user makes of the web server.

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How are cookies sent in HTTP? ›

Whenever the browser sends a request to a server, it also sends any cookies that are relevant to that server. Cookies are transmitted using header fields in the HTTP protocol.

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How to store data in cookies? ›

Create a Cookie with JavaScript

JavaScript can create, read, and delete cookies with the document.cookie property. With JavaScript, a cookie can be created like this: document.cookie = "username=John Doe"; You can also add an expiry date (in UTC time).

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How to Set-Cookie in HTTP response C#? ›

Now we set the cookie in the Web API handler

using System;
using System. Collections. Generic;
using System. Linq;
using System. Net. Http;
using System. Net. Http. Headers;
using System. Web;
namespace HTTPco*kies. Handlers.
{

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Jan 20, 2021

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How to check cookie is set or not in C#? ›

Anyway, to see if a cookie exists, you can check Cookies. Get(string) . However, if you use this method on the Response object and the cookie doesn't exist, then that cookie will be created.

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How to secure cookies in C#? ›

If you are creating cookies manually, you can mark them secure in C# too: Response. Cookies. Add( new HttpCookie("key", "value") { Secure = true, });

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How to Set-Cookie expiration in C#? ›

C# Code

protected void WriteCookie(object sender, EventArgs e)
{
//Create a Cookie with a suitable Key.
HttpCookie nameCookie = new HttpCookie("Name");
//Set the Cookie value.
nameCookie. Values["Name"] = txtName. Text;
//Set the Expiry date.
nameCookie. Expires = DateTime. Now. AddDays(30);

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Jan 7, 2019

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