I noticed that I would get different results when deserializing objects different ways. I must have missed something but couldn't figure out what.
Here is the json:
{
"content_version": "1",
"date_created": "2020-10-06T13:52:15.288Z",
"date_updated": "2020-10-06T13:54:24.325Z",
"content": {
"EN": {
"name_full": {
"text": "Test"
},
"name_short": {
"text": "TEST"
}
}
},
"tools": {
"car": true,
"truck": true,
"fleet": {
"use": true,
"languages": [
{
"fileName": "file1.json",
"name": {
"text": "English"
}
}
]
}
}
}
The following are the classes that I generated using a tool:
public class Root
{
public string content_version { get; set; }
public DateTime date_created { get; set; }
public DateTime date_updated { get; set; }
public ContentRootObject content { get; set; }
public Tools tools { get; set; }
}
public class ContentRootObject
{
[JsonProperty(PropertyName = "content")]
public Dictionary<string, ContentItem> DataItems { get; set; }
}
public class ContentItem
{
public NameFull name_full { get; set; }
public NameShort name_short { get; set; }
}
public class Tools
{
public bool car { get; set; }
public bool truck { get; set; }
public Fleet fleet { get; set; }
}
public class NameFull
{
public string text { get; set; }
}
public class NameShort
{
public string text { get; set; }
}
public class EN
{
public NameFull name_full { get; set; }
public NameShort name_short { get; set; }
}
public class Name
{
public string text { get; set; }
}
public class Language
{
public string fileName { get; set; }
public Name name { get; set; }
}
public class Fleet
{
public bool use { get; set; }
public List<Language> languages { get; set; }
}
and here is the code that I tried for deserializing :
var objTool = Newtonsoft.Json.JsonConvert.DeserializeObject<Tools>(json);
var objRoot = Newtonsoft.Json.JsonConvert.DeserializeObject<Root>(json);
var objContent = Newtonsoft.Json.JsonConvert.DeserializeObject<ContentRootObject>(json)
and here is what I got for each of the objects:
objTool: 'fleet' was returned as null in 'tools'
objRoot: the DataItems of 'content' was null.
objContent: got an error saying "Unexpected character encountered while parsing value: {. Path 'content.EN', line 1, position 146."
Although I can just deserialize the whole thing, I only need objTool and objContent and I was wondering what I did wrong in the above code? Thanks!
The issue is that the class that you have as a wrapper for the dictionary is not represented in the JSON. It'll deserialize the dictionary if you change the root object to this:
public class Root
{
public string content_version { get; set; }
public DateTime date_created { get; set; }
public DateTime date_updated { get; set; }
public Dictionary<string, ContentItem> content { get; set; }
public Tools tools { get; set; }
}
Related
i am trying to get the "definitions" inside the "senses" array how ever there's an object reference error. I created a class and i can only get the values up to "results" array only e.g(id,language,text and word) but i cant access the "lexicalEntries","entries" and "senses" arrays and there values because of the error.
This is my JSON
"id":"bird",
"metadata":{
"operation":"retrieve",
"provider":"Oxford University Press",
"schema":"RetrieveEntry"
},
"results":[
{
"id":"bird",
"language":"en-gb",
"lexicalEntries":[
{
"entries":[
{
"senses":[
{
"definitions":[
"a warm-blooded egg-laying vertebrate animal distinguished by the possession of feathers, wings, a beak, and typically by being able to fly."
],
"id":"m_en_gbus0097360.006",
"subsenses":[]
},
{
"definitions":[
"a person of a specified kind or character"
],
"id":"m_en_gbus0097360.014"
},
{
"definitions":[
"a young woman or a girlfriend."
],
"id":"m_en_gbus0097360.016"
}
]
}
],
"language":"en-gb",
"lexicalCategory":{
"id":"noun",
"text":"Noun"
},
"text":"bird"
}
],
"type":"headword",
"word":"bird"
}
],
"word":"bird"
}
this is my class
class WordDefinition
{
public RootObject rootObject { get; set; }
public Metadata metadata { get; set; }
public List<Result> results { get; set; }
public List<LexicalEntry> lexicalEntries { get; set; }
public List<Entry> entries { get; set; }
public List<Sens> senses { get; set; }
public List<Subsens> subsenses { get; set; }
public LexicalCategory lexicalCategory { get; set; }
public class Metadata
{
public string operation { get; set; }
public string provider { get; set; }
public string schema { get; set; }
}
public class Subsens
{
public List<string> definitions { get; set; }
public string id { get; set; }
}
public class Sens
{
public List<string> definitions { get; set; }
public string id { get; set; }
public List<Subsens> subsenses { get; set; }
}
public class Entry
{
public List<Sens> senses { get; set; }
}
public class LexicalCategory
{
public string id { get; set; }
public string text { get; set; }
}
public class LexicalEntry
{
public List<Entry> entries { get; set; }
public string language { get; set; }
public LexicalCategory lexicalCategory { get; set; }
public string text { get; set; }
}
public class Result
{
public string id { get; set; }
public string language { get; set; }
public List<LexicalEntry> lexicalEntries { get; set; }
public string type { get; set; }
public string word { get; set; }
}
public class RootObject
{
public string id { get; set; }
public Metadata metadata { get; set; }
public List<Result> results { get; set; }
public string word { get; set; }
}
}
and
var test = JsonConvert.DeserializeObject<WordDefinition>(jsonResponse);
foreach(var testing in test.senses)
{
MessageBox.Show(testing.definitions[0].ToString());
}
I expect the output must be results.definitions[0]. but there's an error:
Object reference not set to an instance of an object error
...in json
There are a few things going on here.
1) The JSON isn't valid, it should start with an { character, e.g.:
{
"id": "bird",
"metadata": {
"operation": "retrieve",
"provider": "Oxford University Press",
"schema": "RetrieveEntry"
},
"results": [
{
"id": "bird",
"language": "en-gb",
"lexicalEntries": [
{
"entries": [
{
"senses": [
{
"definitions": [
"a warm-blooded egg-laying vertebrate animal distinguished by the possession of feathers, wings, a beak, and typically by being able to fly."
],
"id": "m_en_gbus0097360.006",
"subsenses": []
},
{
"definitions": [
"a person of a specified kind or character"
],
"id": "m_en_gbus0097360.014"
},
{
"definitions": [
"a young woman or a girlfriend."
],
"id": "m_en_gbus0097360.016"
}
]
}
],
"language": "en-gb",
"lexicalCategory": {
"id": "noun",
"text": "Noun"
},
"text": "bird"
}
],
"type": "headword",
"word": "bird"
}
],
"word": "bird"
}
2) The collections should be initialized in the class definitions, e.g.:
class WordDefinition
{
public RootObject rootObject { get; set; }
public Metadata metadata { get; set; }
public List<Result> results { get; set; } = new List<Result>();
public List<LexicalEntry> lexicalEntries { get; set; } = new List<LexicalEntry>();
public List<Entry> entries { get; set; } = new List<Entry>();
public List<Sens> senses { get; set; } = new List<Sens>();
public List<Subsens> subsenses { get; set; } = new List<Subsens>();
public LexicalCategory lexicalCategory { get; set; }
public class Metadata
{
public string operation { get; set; }
public string provider { get; set; }
public string schema { get; set; }
}
public class Subsens
{
public List<string> definitions { get; set; } = new List<string>();
public string id { get; set; }
}
public class Sens
{
public List<string> definitions { get; set; } = new List<string>();
public string id { get; set; }
public List<Subsens> subsenses { get; set; } = new List<Subsens>();
}
public class Entry
{
public List<Sens> senses { get; set; } = new List<Sens>();
}
public class LexicalCategory
{
public string id { get; set; }
public string text { get; set; }
}
public class LexicalEntry
{
public List<Entry> entries { get; set; } = new List<Entry>();
public string language { get; set; }
public LexicalCategory lexicalCategory { get; set; }
public string text { get; set; }
}
public class Result
{
public string id { get; set; }
public string language { get; set; }
public List<LexicalEntry> lexicalEntries { get; set; } = new List<LexicalEntry>();
public string type { get; set; }
public string word { get; set; }
}
public class RootObject
{
public string id { get; set; }
public Metadata metadata { get; set; }
public List<Result> results { get; set; } = new List<Result>();
public string word { get; set; }
}
}
And 3) The JSON doesn't have a senses element at the root level. Maybe you intended test.results[0].lexicalEntries[0].entries[0].senses instead? e.g.:
var test = JsonConvert.DeserializeObject<WordDefinition>(jsonResponse);
foreach (var testing in test.results[0].lexicalEntries[0].entries[0].senses)
{
MessageBox.Show(testing.definitions[0].ToString());
}
I have a collection of classes set out like this:
public class Xml
{
public string version { get; set; }
public string encoding { get; set; }
}
public class Content
{
public string Expires { get; set; }
public string MaxArrivalScope { get; set; }
}
public class Trip
{
public string ETA { get; set; }
public string TripNo { get; set; }
public string WheelchairAccess { get; set; }
}
public class Destination
{
public string Name { get; set; }
public List<Trip> Trip { get; set; }
}
public class Route
{
public string RouteNo { get; set; }
public string Name { get; set; }
public Destination Destination { get; set; }
}
public class Platform
{
public string PlatformTag { get; set; }
public string Name { get; set; }
public Route Route { get; set; }
}
public class JPRoutePositionET
{
public string xmlns { get; set; }
public string xsi { get; set; }
public string schemaLocation { get; set; }
public Content Content { get; set; }
public Platform Platform { get; set; }
}
public class RootObject
{
public Xml xml { get; set; }
public JPRoutePositionET JPRoutePositionET { get; set; }
}
}
I have JSON like this:
{
"xml": {
"version": "1.0",
"encoding": "utf-8"
},
"JPRoutePositionET": {
"xmlns": "urn:connexionz-co-nz:jp",
"xsi": "http://www.w3.org/2001/XMLSchema-instance",
"schemaLocation": "urn:connexionz-co-nz:jp JourneyPlanner.xsd",
"Content": {
"Expires": "2017-04-09T15:59:31+12:00",
"MaxArrivalScope": "60"
},
"Platform": {
"PlatformTag": "2628",
"Name": "Awatea Rd near Awatea Gdns",
"Route": {
"RouteNo": "125",
"Name": "Redwood/Westlake",
"Destination": {
"Name": "Westlake & Halswell",
"Trip": [
{
"ETA": "4",
"TripNo": "4751",
"WheelchairAccess": "true"
},
{
"ETA": "32",
"TripNo": "4752",
"WheelchairAccess": "true"
}
]
}
}
}
}
}
Why is Newtonsoft not parsing correctly to the Platform class? It returns null. Will I need to format the JSON to cut out all the other information I don't want? Or is it something I am missing?
Fabio's Comment of
var result = Newtonsoft.Json.JsonConvert.DeserializeObject<RootObject>(jsonString);
Worked.
But now when I get JSON like pastebin.com/pebp178s I can't seem to use Json2CSharp to get the classes I'd need as it doesn't make Destination a List, it also changes Trip to an Object instead of a class. Which is really weird. It just throws an error saying the JSON can't be parsed.
I am trying to deserealize json:
Classes is generated by json2sharp
But it throws exception:
Element ": Data" contains data from a data type that maps to the name
"http://schemas.datacontract.org/2004/07/TMSoft.CryptoDoc.Gu45:Gu45".
The deserializer is no information of any type, are matched with the
same name. Use DataContractResolver or add type that matches "Gu45",
the list of known types, such as using KnownTypeAttribute attribute or
by adding it to the list of known types passed to
DataContractSerializer.
How to fix it?
namespace json
{
class Program
{
static void Main(string[] args)
{
string json = System.IO.File.ReadAllText(#"D:\Json.txt");
DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(RootObject));
var account = serializer.ReadObject(new MemoryStream(Encoding.UTF8.GetBytes(json)));
}
}
public class Branch
{
public string Code { get; set; }
public string Name { get; set; }
}
public class Direction
{
public object Code { get; set; }
public string Name { get; set; }
}
public class Org
{
public string Code { get; set; }
public string Name { get; set; }
}
public class Wagon
{
public string Comment { get; set; }
public object NoteTimeString { get; set; }
public string Number { get; set; }
public string OwnerCode { get; set; }
public string StateString { get; set; }
}
public class Data
{
public string __type { get; set; }
public Branch Branch { get; set; }
public string DeliveryTimeString { get; set; }
public Direction Direction { get; set; }
public string EsrCode { get; set; }
public int GU45Type { get; set; }
public object ManeuverTime { get; set; }
public string Number { get; set; }
public Org Org { get; set; }
public object ParkName { get; set; }
public object ParkNum { get; set; }
public string RailwayName { get; set; }
public string RegistrationDateTimeString { get; set; }
public object Span { get; set; }
public string StationName { get; set; }
public string TakingTimeString { get; set; }
public object TrackNum { get; set; }
public object TrackNumAddition { get; set; }
public object WagonNote { get; set; }
public List<Wagon> Wagons { get; set; }
}
public class Body
{
public Data Data { get; set; }
public List<int> Signature { get; set; }
}
public class RootObject
{
public Body Body { get; set; }
public int Revision { get; set; }
public int State { get; set; }
public string StateDate { get; set; }
public string WosId { get; set; }
}
}
Json.txt:
{
"Body": {
"Data": {
"__type": "Gu45:#TMSoft.CryptoDoc.Gu45",
"Branch": {
"Code": "9898",
"Name": "Place"
},
"DeliveryTimeString": "07.03.2014 10:00:00",
"Direction": {
"Code": null,
"Name": "Test"
},
"EsrCode": "320007",
"GU45Type": 2,
"ManeuverTime": null,
"Number": "1",
"Org": {
"Code": "1860",
"Name": "Test"
},
"ParkName": null,
"ParkNum": null,
"RailwayName": "Test",
"RegistrationDateTimeString": "07.03.2014",
"Span": null,
"StationName": "Test",
"TakingTimeString": "07.03.2014 12:00:00",
"TrackNum": null,
"TrackNumAddition": null,
"WagonNote": null,
"Wagons": [
{
"Comment": "РЕМТ",
"NoteTimeString": null,
"Number": "44916989",
"OwnerCode": "22",
"StateString": "0"
}
]
},
"Signature": [
48,
106
]
},
"Revision": 1966,
"State": 2,
"StateDate": "2014-03-07T12:48:03Z",
"WosId": "15805729"
}
I had similar experience in my previous projects with DataContractJsonSerializer. it seems that "__type" field has a special meaning for DataContractJsonSerializer.
This is one of the main reasons that I use Json.net
it matters only if it's the first property in the object but if it has any other positions it works and exceptions is not thrown. you can try it but changing __type position below the branch property in Json.txt. I don't know if it's the case and you can find a workaround.
I haven't tried this solution but it worth to give it a try:
hope it helps
I use JavaScript.Serializer.Deserializer to deserialize a complex JSON object, as below:
{
"name": "rule 1",
"enabled": true,
"conditions": [{
"type": "time",
"time": "17:23:10",
"days": "125"
}, {
"type": "sensor",
"uid": "10.2.0.1",
"setpoint1": 12,
"setpoint2": 18,
"criterion": 1
}, {
"type": "sensor",
"uid": "10.3.0.1",
"setpoint1": 12,
"setpoint2": 18,
"criterion": 2
}],
"actions": {
"period": 100,
"single": false,
"act": [{
"type": "on",
"uid": "10.1.0.1"
}, {
"type": "sms",
"message": "Hello World"
}]
}
}
And I want to convert it to some classes, like below:
public class Rule
{
public string name { get; set; }
public bool enabled { get; set; }
public List<Condition> conditions { get; set; }
public List<Action> actions { get; set; }
}
public class Condition
{
public string type { get; set; }
public string uid { get; set; }
public DateTime? time { get; set; }
public string days { get; set; }
public double setpoint1 { get; set; }
public double setpoint2 { get; set; }
public int criterion { get; set; }
}
public class Action
{
public int period { get; set; }
public bool single { get; set; }
public List<Act> act { get; set; }
}
public class Act
{
public string type { get; set; }
public string uid { get; set; }
public string message { get; set; }
}
The deserialization snippet:
json = new JavaScriptSerializer();
Rule rule = (json.Deserialize<Rule>(jsonStr));
If I simplify the Rule class and declare conditions and actions as simple strings, it works fine.
But if I use the classes like above, it throws an exception:
Cannot convert object of type 'System.String' to type 'System.Collections.Generic.List`1[IoTWebApplication.Condition]'
The structure you create does not fit to the JSON you posted.
It should look like
public class Rule
{
public string name { get; set; }
public bool enabled { get; set; }
public Condition[ ] conditions { get; set; }
public Actions actions { get; set; }
}
public class Actions
{
public int period { get; set; }
public bool single { get; set; }
public Act[ ] act { get; set; }
}
public class Act
{
public string type { get; set; }
public string uid { get; set; }
public string message { get; set; }
}
public class Condition
{
public string type { get; set; }
public string time { get; set; }
public string days { get; set; }
public string uid { get; set; }
public int setpoint1 { get; set; }
public int setpoint2 { get; set; }
public int criterion { get; set; }
}
It is (in most cases) very easy in VS to get the classes direct out of the JSON
Copy JSON to clipboard
In VS EDIT/Special Paste/Paste JSON as Classes (the code above was created by this)
The problem was that the inner (nested) json was quoted and therefore was processed as a string. So when I removed the quotes, it worked fine:
json = new JavaScriptSerializer();
Rule rule = (json.Deserialize<Rule>(jsonStr));
I'm working with OneDrive and need to get information about a folders contents back from the server. This is the type of data I am working with:
{
"data": [
{
"id": "folder.xxxx",
"from": {
"name": "john doe",
"id": "xxxx"
},
"name": "Files that are in a folder",
"description": "",
"parent_id": "folder.xxxx",
"size": 0,
"upload_location": "https://apis.live.net/v5.0/folder.xxxx/files/",
"comments_count": 0,
"comments_enabled": false,
"is_embeddable": true,
"count": 0,
"link": "xxxx",
"type": "folder",
"shared_with": {
"access": "Just me"
},
"created_time": "2014-03-06T18:48:16+0000",
"updated_time": "2014-03-06T18:48:16+0000",
"client_updated_time": "2014-03-06T18:48:16+0000"
}, {
"id": "file.xxxx",
(same as above for rest of data structure)
}, {
"id": "file.xxxx",
(Same as above for rest of data structure)
}
]
}
When doing a different request to the server you get back just the ("id" : "folder.xxx") info chunk and I was able to process that data using a class that looks like this:
[DataContract]
public class ResponseFolder
{
[DataMember(Name = "id")]
public string id { get; set; }
[DataMember(Name = "from")]
public from from { get; set; }
[DataMember(Name = "name")]
public string name { get; set; }
//etc.
And handling the entries like "from" with similar structures:
[DataContract]
public class from
{
public string name { get; set; }
public string id { get; set; }
}
I thought I could do the same for the data request at the top and so have this class which is not working for me:
[DataContract]
public class FolderRequest
{
[DataMember(Name = "data")]
public ResponseFolder data { get; set; }
}
And I try to use it on this line:
FolderRequest = jss.Deserialize<FolderRequest>(json);
But FolderRequest is null after that. I have also tried doing
jss.Deserialize<List<ResponseFolder>>(json);
after googling around how to handle arrays in json but that did not work either.
Any help would be appreciated!
Your complete model is
public class From
{
public string name { get; set; }
public string id { get; set; }
}
public class SharedWith
{
public string access { get; set; }
}
public class ResponseFolder
{
public string id { get; set; }
public From from { get; set; }
public string name { get; set; }
public string description { get; set; }
public string parent_id { get; set; }
public int size { get; set; }
public string upload_location { get; set; }
public int comments_count { get; set; }
public bool comments_enabled { get; set; }
public bool is_embeddable { get; set; }
public int count { get; set; }
public string link { get; set; }
public string type { get; set; }
public SharedWith shared_with { get; set; }
public string created_time { get; set; }
public string updated_time { get; set; }
public string client_updated_time { get; set; }
}
public class FolderRequest
{
public List<ResponseFolder> data { get; set; }
}
and you should serialize as
var obj = new JavaScriptSerializer().Deserialize<FolderRequest>(DATA);
Looks like data needs to be an array:
[DataContract]
public class FolderRequest
{
[DataMember(Name = "data")]
public ResponseFolder[] data { get; set; }
}
If you are ok with use Json.Net (http://james.newtonking.com/json), try this:
public class From
{
public string Name { get; set; }
public string Id { get; set; }
}
public class SharedWith
{
[JsonProperty(PropertyName = "access")]
public string AccessName { get; set; }
}
public class ResponseFolder
{
public string Id { get; set; }
public From From { get; set; }
public string Name { get; set; }
public string Description { get; set; }
[JsonProperty(PropertyName = "shared_with")]
public SharedWith SharedWith { get; set; }
}
public class RootObject
{
public List<ResponseFolder> data { get; set; }
}
And then your deserialization:
var result = JsonConvert.DeserializeObject<RootObject>(json);
Hope this helps.