Binding ( Mapping ) Json in c# class

Question

I have below Json :-

{
    "EventMessageUId": "ef51b5a3-32b2-e611-baf9-fc3fdb446bd2",

    "Message": [{
        "StoryID": 1,
        "StoryDesc": "xyzzzz"
    }],
    "ProjectUId": "00100000-0000-0000-0000-000000000000",
    "ProjectId": 1,
    "CreatedByUser": "system",
    "CreatedByApp": "myWizard-Fortress",
    "CreatedOn": "2016-11-24T10:44:39.473"
}

I have made binding classes as :-

public class Requirements
    {
        public string EventMessageUId { get; set; }
        public int ProjectId { get; set; }
        public string CreatedByUser { get; set; }
        public string CreatedByApp { get; set; }        
        public string CreatedOn { get; set; }
        Message obj = new Message();
    }

    public class Message
    {
        public string StoryID { get; set; }
        public string StoryDesc { get; set; }
    }

I am mapping it as below :-

Requirements objRequirement = JsonObject.ToObject<Requirements>();

But when I see through HOver :-

As we can see in the Image :-

Message obj = new Message();

Obj is becoming Null

How can I map it in the correct way ?

Edit 1 :

I changed my class to :-

 public class Requirements
    {     
        public string EventMessageUId { get; set; }
        public int ProjectId { get; set; }
        public string CreatedByUser { get; set; }
        public string CreatedByApp { get; set; }        
        public string CreatedOn { get; set; }
        public Message Requirement { get; set; }        
    }

Same problem :-

unicorn2 · Accepted Answer · 2016-12-20 08:15:06Z

2

Just change your class so that there is a message property. In your class it is called obj. The message property should also be public so that it can be set.

public class Requirements
{
    public string EventMessageUId { get; set; }
    public int ProjectId { get; set; }
    public string CreatedByUser { get; set; }
    public string CreatedByApp { get; set; }        
    public string CreatedOn { get; set; }
    public Message message { get; set; }
}

public class Message
{
    public string StoryID { get; set; }
    public string StoryDesc { get; set; }
}

edited Dec 20, 2016 at 8:15

answered Dec 20, 2016 at 8:09

unicorn2

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4 Comments

C Sharper Over a year ago

please see me Edit 1

unicorn2 Over a year ago

Just change this line: public Message Requirement { get; set; } to public Message Message { get; set; }

unicorn2 Over a year ago

The name in your JSON and C# should be the same: "Message"

unicorn2 Over a year ago

@CSharper Rajshekar Reddy is correct your json object seems to have a list or array of messages. Meaning multiple Messages. try: public List<Message> Message {get; set;}

Mahdi · Accepted Answer · 2016-12-20 08:21:31Z

1

Modify your first class as follows:

public Message[] Message { get; set; }

answered Dec 20, 2016 at 8:21

Mahdi

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1 Comment

unicorn2 Over a year ago

You are correct, looking at the JSON Message is an array: "Message": [{ "StoryID": 1, "StoryDesc": "xyzzzz" }], If you look at the [{}]

FBO · Accepted Answer · 2016-12-20 08:21:55Z

I see 3 possible issues :

In your Json you reffer the Message object by the name Message, in your class definition, its name is obj
In your Json, the Message object is set as an array
Your Message object is not settable

{
    "EventMessageUId": "ef51b5a3-32b2-e611-baf9-fc3fdb446bd2",

    "Message": {
        "StoryID": 1,
        "StoryDesc": "xyzzzz"
    },
    "ProjectUId": "00100000-0000-0000-0000-000000000000",
    "ProjectId": 1,
    "CreatedByUser": "system",
    "CreatedByApp": "myWizard-Fortress",
    "CreatedOn": "2016-11-24T10:44:39.473"
}

public class Requirements
{
    public string EventMessageUId { get; set; }
    public int ProjectId { get; set; }
    public string CreatedByUser { get; set; }
    public string CreatedByApp { get; set; }        
    public string CreatedOn { get; set; }

    private Message _Message = new Message();
    public Message Message  { get { return this._Message ; } set { this._Message = value; } }

}
public class Message
{
   public string StoryID { get; set; }
   public string StoryDesc { get; set; }
}

Rajshekar Reddy · Accepted Answer · 2016-12-20 08:40:26Z

You need a property named Message which is an Collection (use List) in your Requirements class. Remove the Message obj = new Message();

Add this to your class

public List<Message> Message {get; set;}

So your class definition must look like.

public class Requirements
{
    public string EventMessageUId { get; set; }
    public int ProjectId { get; set; }
    public string CreatedByUser { get; set; }
    public string CreatedByApp { get; set; }        
    public string CreatedOn { get; set; }
    public List<Message> Message {get; set;}  //add this
}

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