Missing guid when deserializing an object using JSON and C #

Question

I use the newtonsoft library to deserialize a slightly complex object and fall into a trap where the identifiers inside the MetaData object are not populated and all other values ​​look normal. All basic objects are derived from a class model that has basic properties such as Id. Does anyone have any suggestions as to what is going on here?

This is the JSON that I use for testing, the top level object is the page:

{ "CreatedOn": "2012-07-30T13:42:45+01:00", "CreatedBy": "33576D49-B799-4326-812C-D6A3C47B7035", "Name": "Icecream", "Metadata": [ { "CreatedOn": "2012-07-30T14:06:31+01:00", "ModifiedOn": "2012-07-30T14:06:31+01:00", "ModifiedBy": "53D947AC-0D7B-42C4-929E-DAFC25932784", "Name": "Colour", "Value": "Blue", "NodeReference": "834a2734-e807-4eb7-a242-c26d785681f3", "Scope": "Draft", "Id": "032488bd-158c-4064-93ec-44bd11c4e642", "CreatedBy": "53D947AC-0D7B-42C4-929E-DAFC25932784" }, { "CreatedOn": "2012-07-30T13:48:49+01:00", "ModifiedOn": "2012-07-30T14:23:20+01:00", "ModifiedBy": "10E0821E-1982-4C24-B9E1-35FAF9A547BB", "Name": "Topping", "Value": "Chocolate sprinkles", "NodeReference": "834a2734-e807-4eb7-a242-c26d785681f3", "Scope": "Live", "Id": "241afb40-0d83-4599-a05e-aec1a6cdef41", "CreatedBy": "CE1F79DE-9ECF-456F-8C17-D9B7E4B6FCA7" } ], "WikiResources": [ ], "FileResources": [ ], "Links": [ ], "Id": "834a2734-e807-4eb7-a242-c26d785681f3" } 

Here is the (simplified) version of my code:

 public abstract class Model { protected Guid? _id; public Guid? Id { get { return _id;} set { _id = value; IsDirty = true; } } private string _name; //eg page Heading public string Name { get { return _name; } set { _name = value; IsDirty = true; } } private DateTime _createdOn; public DateTime CreatedOn { get { return _createdOn; } set { _createdOn = value; IsDirty = true; } } private string _createdBy; public string CreatedBy { get { return _createdBy; } set { _createdBy = value; IsDirty = true; } } [JsonIgnore] public bool IsDirty { get; set; } [JsonIgnore] public bool IsNew { get; set; } private List<MetaDatum> _metadata; public List<MetaDatum> MetaData { get { return _metadata; } set { _metadata = value; } } } public class MetaDatum : Model, IModel { //other properties and methods omitted #region construction public MetaDatum() { IsNew = false; webservice = WebserviceManager.GetWebservice(); } //quick factory method for creating a name value pair public static MetaDatum Create(string name, string value, ScopeType scope) { MetaDatum md = new MetaDatum(); md.Name = name; md.CreatedOn = DateTime.Now; md.Scope = scope; md.Value = value.ToString(); md.IsNew = true; md.IsDirty = true; return md; } #endregion } public class Page : Model, IModel { //other properties and methods omitted public static Page Deserialize(string text) { if (text == "" || text == null) return null; dynamic serializedObj = JsonConvert.DeserializeObject(text); Page convertedObject = JsonConvert.DeserializeObject<Page>(text); return convertedObject; } } 

Answer 1

I have a job to get the identifiers manually after deserialization, setting it as a dynamic object and collapsing into it. But maybe there is a better way to do this in one go?

 int i = 0; dynamic serializedObj = JsonConvert.DeserializeObject(text); foreach (dynamic item in serializedObj.Metadata) { convertedObject.MetaData[i++].Id = Guid.Parse(item.Id.ToString()); } 

Answer 2

Confirm the type of data that you send to the header, I mean MediaTypeWithQualityHeaderValue (" text / plain ") <- since it can be an application / Json or text / json, this type can be changed. Serialization can be done.