Deserialize JSON string into a C# complex class object

Question

If the class consists of simple JSON-compatible types, MyClass obj = JsonConvert.DeserializeObject<MyClass>(JSONtext); does the job quite nicely. If MyClass contains enum or struct properties, the DeserializeObject<> method returns null. I'm currently iterating through the JSON response deserialized into a JObject, assigning values to the inner class created, and returning it. Is there a better way to deserialize the JSON string into an heterogeneous class object?

class MyClass
{
    public Int32 wishlistID;
    public Basket currentBasket; //struct
    public List<Int32> items;
    public dStatus _dStatus; //enum
}

Edit: turns out that, for some reason, all Basket's properties had the private modifier; of course they couldn't be accessed and result to be therefore null. Switching it to public did the trick.

Amir Popovich · Accepted Answer · 2015-01-25 11:59:11Z

6

Your members have to be public in order for this to work.

This doesn't work:

public class MyClass
{
    Int32 a;
    string b; //struct
}

string json = "{ a: 7, b:'abc' }";
MyClass cc = JsonConvert.DeserializeObject<MyClass>(json);

This does work:

public class MyClass
{
    public Int32 a;
    public string b; //struct
}

string json = "{ a: 7, b:'abc' }";
MyClass cc = JsonConvert.DeserializeObject<MyClass>(json);

Edit:

So after we got through that public stuff you claim that structs\enums don't pass.
Here's and example that they do:

public class MyClass
{
    public Int32 a;
    public test b;
    public eMyEnum c;
}

public struct test
{
    public string str;
}

public enum eMyEnum
{
    A = 0,
    B
}

string json = "{ a: 7, b: {str:'str'}, c: 'B' }";
MyClass cc = JsonConvert.DeserializeObject<MyClass>(json);

edited Jan 25, 2015 at 11:59

answered Jan 25, 2015 at 11:09

Amir Popovich

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4 Comments

Johnny Bueti Over a year ago

Edited, forgot to put the public modifiers, thanks!

Johnny Bueti Over a year ago

As for the b property though, if it was to be a Basket struct, the method would still return null.

Amir Popovich Over a year ago

@ShinyPhoenix - I've edited and added an example that structs\enums work. Please provide some more info so we can spot your bug.

Johnny Bueti Over a year ago

Argh, they do indeed! For some reason - can't realize what I was thinking at the time I wrote the code - all the struct's properties were private! Switching them to public did the trick. Thank you!

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