C# custom json serialization

Question

This class

class X{
    public string a{get;set}
    public string b{get;set}
}

is serialized like

{..., inst:{a:"value", b:"value"}, ...}

I need object of my class to be serialized like this:

{..., inst: x, ...}

Where x is a+b How can I customize JSON serialization process from my class?

Most people finding this Q&A will want to customize the Newtonsoft JSON serialization process, outputting valid JSON that is different than a serialization of all public properties. (OP's output does not appear to be valid JSON, because value x isn't quoted - in that case, can't use this technique.) Simple changes, such as hiding an attribute, can be done using JSON Serialization Attributes. More complex changes require writing custom JsonConverter per class. — ToolmakerSteve
– ToolmakerSteve, Commented Oct 1, 2019 at 9:42

Pwaddles · Accepted Answer · 2011-10-02 10:05:02Z

2

Checkout Newton-softs JSON serializer. Its pretty sweet.

Have you tried making a and b private, and then have something like

public string x { get { return a + b; } }

answered Oct 2, 2011 at 10:05

Pwaddles

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2 Comments

FLCL Over a year ago

Great idea about sum-property, but I deserialize this object from database first so I need these field to be public. So I will use Newton library, unfortunately there is no solutions from the box.

Jonas Høgh Over a year ago

Consider using dedicated classes for your persistence model and viewmodel (or whatever it is you're serializing to Json). I find this is the easiest way to avoid problems like these. If the mapping between models becomes too complex, consider using automapper to manage it.

Davan Etelamaki · Accepted Answer · 2013-01-31 19:36:13Z

1

Try it like this

class X{
    public string a{private get;set;}
    public string b{private get;set;}
    public string x {get{ return a + b; }}
}

Having a private get removes it from serialization but still allows it to be set. The other option is to do it like this.

class X{
    public string a{set;}
    public string b{set;}
    public string x {get{ return a + b; }}
}

answered Jan 31, 2013 at 19:36

Davan Etelamaki

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