ERROR: Parsing Cookie Using Json.net

Question

I am getting error while parsing cookie created using jquery in asp.net.It throws error at line 3: Unexpected character encountered while parsing value: %. Path '', line 0, position 0.

HttpCookie MyCookie = Request.Cookies["cart"];
Response.Write(MyCookie.Value.ToString());            
var myobjects = JsonConvert.DeserializeObject<CookieCart>(MyCookie.Value.ToString());

Sample Cookie Value:

[
  {
    "id": 1,
    "thumbnail": "/cocosamples/images/cocopeat/branded/430041-0014_1_t.jpg",
    "title": "cocopeat",
    "url": "product.html",
    "price": "$ 250.00",
    "qty": 3
  }
]

CookieCart Class

public int ID { get; set; }
public string Thumbnail { get; set; }
public string Title { get; set; }
public string Url { get; set; }
public string Price { get; set; }
public int Qty { get; set; }

MyCookie Value:

%5B%7B%22id%22%3A1%2C%22thumbnail%22%3A%22http%3A%2F%2Flocalhost%3A52781%2FASVOnline%2Ftheme%2Fimages%2Fwomen%2Fskirt%2F430041-0014_1_t.jpg%22%2C%22title%22%3A%22Inceptos%20orci%20hac%20libero%22%2C%22url%22%3A%22product.html%22%2C%22price%22%3A%22%24%20250.00%22%2C%22qty%22%3A10%7D%5D

Cookie cart

when i try to read the same cookie value using JavaScriptSerializer i got error Invalid JSON primitive: . — padma2129
– padma2129, Commented Mar 27, 2014 at 18:36

Habib · Accepted Answer · 2014-03-27 19:14:43Z

3

Your cookie value is encoded. Use Server.UrlDecode. Also your JSON is returning multiple CookieCart items since it is an array having []. You need to de-serialize your object to either List<CookieCart> or CookieCart[] like:

var myobjects = JsonConvert.DeserializeObject<List<CookieCart>>
                             (Server.UrlDecode(MyCookie.Value.ToString()));

and then to get a single object:

CookieCart singleItem = myobjects.FirstOrDefault();

edited Mar 27, 2014 at 19:14

answered Mar 27, 2014 at 18:42

Habib

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4 Comments

padma2129 Over a year ago

Now i am getting the following error... Cannot deserialize the current JSON array (e.g. [1,2,3]) into type 'CookieCart' because the type requires a JSON object (e.g. {"name":"value"}) to deserialize correctly. To fix this error either change the JSON to a JSON object (e.g. {"name":"value"}) or change the deserialized type to an array or a type that implements a collection interface (e.g. ICollection, IList) like List<T> that can be deserialized from a JSON array. JsonArrayAttribute can also be added to the type to force it to deserialize from a JSON array. Path '', line 1, position 1.

padma2129 Over a year ago

Cannot deserialize the current JSON array (e.g. [1,2,3]) into type 'CookieCart' because the type requires a JSON object (e.g. {"name":"value"}) to deserialize correctly.

Habib Over a year ago

@padmaCybonyx, Fixed that in my answer. You are basically getting a collection of CookieCart. Check the updated code.

padma2129 Over a year ago

good catch...u saved me a day... had been trying from afternoon using various methods.

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