CODEWITHSUNDEEP
c#jsonjson.netdeserialization
Alex
Alex

Reputation: 33

JSON.Net, JsonConvert.DeserializeObject - problems with deserialization

When I am trying to deserialize my JSON with JSON.Net it gives me invalid values for JSON arrays.

I have simple JSON:

[
{
    "PhaseName": "Start",
    "Advices": ["Lorem ipsum dolor",
    "Lorem ipsum dolor",
    "Lorem ipsum dolor"]
},
{
    "PhaseName": "In Progress",
    "Advices": ["Lorem ipsum dolor",
    "Lorem ipsum dolor",
    "Lorem ipsum dolor"]
},
{
    "PhaseName": "Finish",
    "Advices": ["Lorem ipsum dolor",
    "Lorem ipsum dolor",
    "Lorem ipsum dolor"]
}

]

And a correspondent class in my code:

public class Advices
{
    public string PhaseName { get; set; }
    public List<string> AdvicesList { get; set; }
}

And a veriable that represents an array of Advices objects:

public class MyAdvices
{
    private Advices[] MyAdvicesArrays;
....

So when I am trying to deserialize my JSON like that:

MyAdvicesArrays= JsonConvert.DeserializeObject<Advices[]>(sMyJSON));

JSON.Net populates "Phase Name" property of each object in my MyAdvicesArrays array with correct value but Advices array of each object is invalid: "Could not evaluate expression" if you check them in runtime. I don't get it. What I've done wrong?

Upvotes: 3

Views: 4991

Answers (3)

nick_w
nick_w

Reputation: 14938

All I did to get this working was to change the definition of the Advices class:

public class Advice
{
    public string PhaseName { get; set; }
    public List<string> Advices { get; set; }
}

I changed the class name to just Advice and AdvicesList property to Advices.

Upvotes: 0

andy
andy

Reputation: 8875

No, you're JSON is incorrect as is you Class.

First change your JSON to this:

{
    phases:[
        {
            "PhaseName": "Start",
            "Advices": ["Lorem ipsum dolor",
            "Lorem ipsum dolor",
            "Lorem ipsum dolor"]
        },
        {
            "PhaseName": "In Progress",
            "Advices": ["Lorem ipsum dolor",
            "Lorem ipsum dolor",
            "Lorem ipsum dolor"]
        },
        {
            "PhaseName": "Finish",
            "Advices": ["Lorem ipsum dolor",
            "Lorem ipsum dolor",
            "Lorem ipsum dolor"]
        }
    ]
}

Notice before you weren't declaring you JSON object correctly. Also you need a property for the array.

Now you'll need two classes:

public class AnythinYouWant{
    public List<Phase> Phases{get;set;}
}

public class Phase{
    public string PhaseName{get;set;}
    public List<string> Advices{get;set;}
}

Notice how the first class is for the top level JSON object. The name can be whatever you want. But any property needs to match the name.

Upvotes: 0

Asif Mushtaq
Asif Mushtaq

Reputation: 13150

Your json is not valid according to the entities.

In your type change AdvicesList to Advices. 

public List<string> AdvicesList { get; set; }

Change it to 

public List<string> Advices { get; set; }

Upvotes: 1

Related Questions