Question

Using .NET’s DataContractJsonSerializer, I am trying to deserialize a JSON object into a class I defined.
However, the object I’m deserializing has more fields than I need.
Is there a way to make it only deserialize the fields I specified in my corresponding class?
I’m trying to avoid this SerializationException:

The data contract type ‘xxx’ cannot be deserialized because the required data member ‘yyy’ was not found.

Answer 1

This is how I fix most of my JSON errors in .NET. I use JSON.NET instead of the built-in one.

http://json.codeplex.com/

Here’s a quick example shamelessly taken from their docs:

Product product = new Product();

product.Name = "Apple";
product.Expiry = new DateTime(2008, 12, 28);
product.Price = 3.99M;
product.Sizes = new string[] { "Small", "Medium", "Large" };

string output = JsonConvert.SerializeObject(product);
//{
//  "Name": "Apple",
//  "Expiry": "\/Date(1230375600000+1300)\/",
//  "Price": 3.99,
//  "Sizes": [
//    "Small",
//    "Medium",
//    "Large"
//  ]
//}

Product deserializedProduct = JsonConvert.DeserializeObject<Product>(output);

Good luck.