JavaScriptSerializer.Deserialize array

Question

I'm having trouble deserializing an array in .NET MVC3, any help would be appreciated.

Here's the code snippet:

using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)
using (StreamReader reader = new StreamReader(response.GetResponseStream())) {
    JavaScriptSerializer jsSerializer = new JavaScriptSerializer();
    string jsonData = reader.ReadToEnd();
    result = (BigCommerceOrderProducts)jsSerializer.Deserialize<BigCommerceOrderProducts>(jsonData);
}

Here's the subset of the data string returned by JSON as jsonData. I've remove extra fields.

"[
{\"id\":33,\"order_id\":230025,...},
{\"id\":34,\"order_id\":230025,...}
]"

Here are the objects:

[Serializable]
public class BigCommerceOrderProducts {
    public List<BigCommerceOrderProduct> Data { get; set; }
}

[Serializable]
public class BigCommerceOrderProduct {
    public int Id { get; set; }
    public int Order_id { get; set; }
    ...
}

I'm getting this error:

"Type 'Pxo.Models.BigCommerce.BigCommerceOrderProducts' is not supported for deserialization of an array.

Any ideas?

is your json string wrapped in a .NET object? have a look here: stackoverflow.com/questions/402996/… — JoJa
– JoJa, Commented Jan 27, 2012 at 13:21

L.B · Accepted Answer · 2012-01-27 13:26:04Z

56

You should deserialize your json string to type List<BigCommerceOrderProduct>. No need for BigCommerceOrderProducts class

var myobj = jsSerializer.Deserialize<List<BigCommerceOrderProduct>>(jsonData);

answered Jan 27, 2012 at 13:26

L.B

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1 Comment

netwire Over a year ago

Thanks, that makes sense now. Let me try again and report back.

Chris Gessler · Accepted Answer · 2012-01-27 13:37:19Z

1

This little proggy works fine for me. Could be something unexpected in the response stream.

The json output is: {"Data":[{"Id":33,"Order_id":230025},{"Id":34,"Order_id":230025}]}

    JavaScriptSerializer jsSerializer = new JavaScriptSerializer(); 

    BigCommerceOrderProducts a = new BigCommerceOrderProducts();
    a.Data = new List<BigCommerceOrderProduct>();
    BigCommerceOrderProduct b = new BigCommerceOrderProduct();
    b.Id = 33;
    b.Order_id = 230025;

    a.Data.Add(b);

    b = new BigCommerceOrderProduct();
    b.Id = 34;
    b.Order_id = 230025;

    a.Data.Add(b);

    string x = jsSerializer.Serialize(a);
    Console.WriteLine(x);

    a = jsSerializer.Deserialize<BigCommerceOrderProducts>(x);

    Console.WriteLine(a.Data[0].Order_id);

    Console.ReadLine();

answered Jan 27, 2012 at 13:37

Chris Gessler

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3 Comments

L.B Over a year ago

Chris, "[ {\"id\":33,\"order_id\":230025,...}, {\"id\":34,\"order_id\":230025,...} ]" is an array, on the other hand {"Data":[{"Id":33,"Order_id":230025},{"Id":34,"Order_id":230025}]} is an object containing an array. Two different things.

Chris Gessler Over a year ago

Yes, I know the difference. Either the OP left off the "Data": part or the OP is attempting to deserialize an array to List<>. So either the json returned in the response is incorrect, or the OP needs to deserialize to BigCommerceOrderProduct[] instead.

L.B Over a year ago

See my answer, response is correct and can be deserialized to List. (I never post a code before running on my machine or I mark it as UNTESTED)

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