In this article I will explain with an example, how to read, write and remove (Delete) Cookies in ASP.Net MVC.
Note: For beginners in ASP.Net MVC, please refer my article ASP.Net MVC Hello World Tutorial with Sample Program example.
 
 

Controller

The Controller consists of the following Action methods.

Action method for handling GET operation

Inside this Action method, simply the View is returned.
 

Action method for writing Cookie

When the Write Cookie Button is clicked, an object of HttpCookie class is created and Name of the cookie is defined.
Then, the TextBox value is saved in the Cookie and Expiry of Cookie is also set.
Finally, the Cookie is added to the Response.Cookies collection and the page is redirected to itself.
 

Action method for reading Cookie

When the Read Cookie Button is clicked, the Cookie value is read from the Request.Cookies collection using its Key and saved into a TempDatampData object.
The value read from the Cookie is set in TempData object and the page is redirected to itself.
 

Action method for deleting Cookie

When the Remove Cookie Button is clicked, the Cookie value is read from the Request.Cookies collection using its Key and is removed or deleted.
Finally, the Cookie is updated back into the Response.Cookies collection and the page is redirected to itself.
public class HomeController : Controller
{
    // GET: Home
    public ActionResult Index()
    {
        return View();
    }
 
    [HttpPost]
    public ActionResult WriteCookie()
    {
        //Create a Cookie with a suitable Key.
        HttpCookie nameCookie = new HttpCookie("Name");
 
        //Set the Cookie value.
        nameCookie.Values["Name"] = Request.Form["name"];
 
        //Set the Expiry date.
        nameCookie.Expires = DateTime.Now.AddDays(30);
 
        //Add the Cookie to Browser.
        Response.Cookies.Add(nameCookie);
 
        return RedirectToAction("Index");
    }
 
    [HttpPost]
    public ActionResult ReadCookie()
    {
        //Fetch the Cookie using its Key.
        HttpCookie nameCookie = Request.Cookies["Name"];
 
        //If Cookie exists fetch its value.
        string name = nameCookie != null ? nameCookie.Value.Split('=')[1] : "undefined";
 
        TempData["Message"] = name;
 
        return RedirectToAction("Index");
    }
 
    [HttpPost]
    public ActionResult DeleteCookie()
    {
        //Fetch the Cookie using its Key.
        HttpCookie nameCookie = Request.Cookies["Name"];
 
        //Set the Expiry date to past date.
        nameCookie.Expires = DateTime.Now.AddDays(-1);
 
        //Update the Cookie in Browser.
        Response.Cookies.Add(nameCookie);
 
        return RedirectToAction("Index");
    }
}
 
 

View

HTML Markup

The View consists of an HTML Form which has been created using the Html.BeginForm method with the following parameters.
ActionName – Name of the Action. In this case is it set to NULL as the Action method name is set directly on the Submit Button using FormAction attribute.
ControllerName – Name of the Controller. In this case the name is Home.
FormMethod – It specifies the Form Method i.e. GET or POST. In this case it will be set to POST.
The Form consists of a TextBox and three Submit Buttons i.e. for Reading Cookie, Writing Cookie and Deleting Cookie.
Each Submit Button has been set with a FormAction attribute which specifies the Action method which will be called when the Submit button is clicked.
 

Submitting the Form

When the Read Cookie Button is clicked, the TempData object is checked for NULL if it is not NULL then the value of the TempDataata object is displayed using JavaScript Alert Message Box.
@{
    Layout = null;
}
 
<!DOCTYPE html>
 
<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>Index</title>
    <style type="text/css">
        body {
            font-family: Arial;
            font-size: 10pt;
        }
    </style>
</head>
<body>
    @using (Html.BeginForm(null, "Home", FormMethod.Post))
    {
        <span>Name:</span><input type="text" id="txtName" name="name" /><br /><br />
        <input type="submit" id="btnWrite" formaction="@Url.Action("WriteCookie")" value="Write Cookie" /> 
        <input type="submit" id="btnRead" formaction="@Url.Action("ReadCookie")" value="Read Cookie" /> 
        <input type="submit" id="btnDelete" formaction="@Url.Action("DeleteCookie")" value="Remove Cookie" /> 
    }
    @if (TempData["Message"] != null)
    {
        <script type="text/javascript">
            window.onload = function () {
                alert('@TempData["Message"]');
            };
        </script>
    }
</body>
</html>
 
 

Screenshot

ASP.Net MVC Cookies: Read, Write (Save) and Remove (Delete) Cookies in ASP.Net MVC
 
 

Demo

View Demo
 
 

Downloads

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