I am trying to deserialize a json (using Newtonsoft.Json), i created the classes, but in json code there is a variable that i don't know if it is corrected or i don't know how to deserialize.
I am getting a null exception on line : MessageBox.Show(root.matriculations._14000.name)
private void btnImportaDados_Click(object sender, EventArgs e)
{
string getDataUrl = "https://xxx.xxx.com/api/matriculations/get.json?entity_code=14000";
try
{
using (var webClient = new System.Net.WebClient())
{
var json = webClient.DownloadString(getDataUrl);
var root = JsonConvert.DeserializeObject<Rootobject>(json);
MessageBox.Show(root.matriculations._14000.name);
}
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
}
}
public class Rootobject
{
public Matriculations matriculations { get; set; }
}
public class Matriculations
{
public _14000 _14000 { get; set; }
}
public class _14000
{
public string entity_code { get; set; }
public string name { get; set; }
public string street { get; set; }
public string local { get; set; }
public string postal_code { get; set; }
public string sub_postal_code { get; set; }
public string phone1 { get; set; }
public object phone2 { get; set; }
public string email1 { get; set; }
public object email2 { get; set; }
public string entity_code_2 { get; set; }
public string courseaction_ref { get; set; }
public string courseaction_id { get; set; }
public string course_code { get; set; }
public string course { get; set; }
public Billingorderplan[] billingorderplans { get; set; }
}
public class Billingorderplan
{
public string id { get; set; }
public string paid { get; set; }
public string date { get; set; }
public object obs { get; set; }
public object payment_doc_num { get; set; }
public string value { get; set; }
public string description { get; set; }
public string entity_code { get; set; }
public object paid_date { get; set; }
}
The result(json data) from the url is:
{"matriculations":{"14000":{"entity_code":"14000","name":"Fabio Danilson Sivone Antonio","street":"Rua Dr. Pereira Jardim, Bl. 3 - 25 - 4 B","local":"Luanda","postal_code":"2685","sub_postal_code":"093","phone1":"923810539","phone2":null,"email1":"fabiodanilson1#hotmail.com","email2":null,"entity_code_2":"9957","courseaction_ref":"EPCE_01","courseaction_id":"1828","course_code":"EPCE","course":"Especializa\u00e7\u00e3o Avan\u00e7ada em Investiga\u00e7\u00e3o de Crime Econ\u00f3mico [E-learning]","billingorderplans":[{"id":"298","paid":"0","date":"2020-05-06","obs":null,"payment_doc_num":null,"value":"0.00","description":"Inscri\u00e7\u00e3o","entity_code":"14000","paid_date":null},{"id":"299","paid":"0","date":"2019-11-21","obs":null,"payment_doc_num":null,"value":"0.00","description":"1\u00aa presta\u00e7\u00e3o","entity_code":"14000","paid_date":null},{"id":"300","paid":"0","date":"2019-12-08","obs":null,"payment_doc_num":null,"value":"0.00","description":"2\u00aa presta\u00e7\u00e3o","entity_code":"14000","paid_date":null},{"id":"301","paid":"0","date":"2020-01-08","obs":null,"payment_doc_num":null,"value":"0.00","description":"3\u00aa presta\u00e7\u00e3o","entity_code":"14000","paid_date":null},{"id":"302","paid":"0","date":"2020-02-08","obs":null,"payment_doc_num":null,"value":"0.00","description":"4\u00aa presta\u00e7\u00e3o","entity_code":"14000","paid_date":null},{"id":"303","paid":"0","date":"2020-03-08","obs":null,"payment_doc_num":null,"value":"0.00","description":"5\u00aa presta\u00e7\u00e3o","entity_code":"14000","paid_date":null},{"id":"304","paid":"0","date":"2020-04-08","obs":null,"payment_doc_num":null,"value":"0.00","description":"6\u00aa presta\u00e7\u00e3o","entity_code":"14000","paid_date":null},{"id":"305","paid":"0","date":"2020-05-08","obs":null,"payment_doc_num":null,"value":"0.00","description":"7\u00aa presta\u00e7\u00e3o","entity_code":"14000","paid_date":null},{"id":"306","paid":"0","date":"2020-06-08","obs":null,"payment_doc_num":null,"value":"0.00","description":"8\u00aa presta\u00e7\u00e3o","entity_code":"14000","paid_date":null},{"id":"16595","paid":"0","date":"2020-08-27","obs":null,"payment_doc_num":null,"value":"20.00","description":"EExt - Atividade","entity_code":"14000","paid_date":null},{"id":"16596","paid":"0","date":"2020-08-27","obs":null,"payment_doc_num":null,"value":"45.00","description":"EExt - Teste","entity_code":"14000","paid_date":null},{"id":"16597","paid":"0","date":"2020-08-27","obs":null,"payment_doc_num":null,"value":"20.00","description":"EExt - Atividade","entity_code":"14000","paid_date":null},{"id":"16598","paid":"0","date":"2020-08-27","obs":null,"payment_doc_num":null,"value":"45.00","description":"EExt - Teste","entity_code":"14000","paid_date":null},{"id":"16599","paid":"0","date":"2020-08-27","obs":null,"payment_doc_num":null,"value":"20.00","description":"EExt - Atividade","entity_code":"14000","paid_date":null},{"id":"16601","paid":"0","date":"2020-08-27","obs":null,"payment_doc_num":null,"value":"45.00","description":"EExt - Teste","entity_code":"14000","paid_date":null},{"id":"16600","paid":"0","date":"2020-08-27","obs":null,"payment_doc_num":null,"value":"20.00","description":"EExt - Atividade","entity_code":"14000","paid_date":null}]}}}
But that "14000" is a varible value depending from the parameter passed.
How can i do it?
Thank You.
Since 14000 cannot be a variable name you will have to resort to some manual intervention to capture that dynamic value. The cleanest way is to remove the Matriculations class and replace it with Dictionary<int, _14000> (or Dictionary<string, _14000>).
public class Rootobject
{
public Dictionary<int, _14000> matriculations { get; set; }
}
This will ensure that the key is captured correctly even if it is a number. You can read the object from the dictionary's values as such: root.matriculations.Values.First().name. (Remember to import System.Linq for using .First().)
For clarity you can rename _14000 to something more descriptive.
You do not have _14000 in returned JSON but 14000 under matriculations.
This question already has answers here:
How can I parse a JSON string that would cause illegal C# identifiers?
(3 answers)
Closed 2 years ago.
I'm trying to query the most important information from wikipedia articles using the wikimedia API. Within my code I have the following line:
WikiArticleModel article = await response.Content.ReadAsAsync<WikiArticleModel>().ConfigureAwait(false);
This is a example of the way my JSON object looks like when testing on the article from the planet Jupiter:
{
"batchcomplete": "",
"query": {
"normalized": [
{
"from": "jupiter",
"to": "Jupiter"
}
],
"pages": {
"38930": {
"pageid": 38930,
"ns": 0,
"title": "Jupiter",
"extract": ">>> Her comes the first section of the article, which I deleted to make
this shorter <<<",
"description": "Fifth planet from the Sun and largest planet in the Solar System",
"descriptionsource": "local",
"original": {
"source": "https://upload.wikimedia.org/wikipedia/commons/2/2b/Jupiter_and_its_shrunken_Great_Red_Spot.jpg",
"width": 940,
"height": 940
}
}
}
}
}
The question is now, how should my WikiArticleModel class look like? Using the build-in VS Studio too "Paste JSON as class" I get the following result:
public class WikiArticleModel
{
public string batchcomplete { get; set; }
public Query query { get; set; }
}
public class Query
{
public Normalized[] normalized { get; set; }
public Pages pages { get; set; }
}
public class Pages
{
public _38930 _38930 { get; set; }
}
public class _38930
{
public int pageid { get; set; }
public int ns { get; set; }
public string title { get; set; }
public string extract { get; set; }
public string description { get; set; }
public string descriptionsource { get; set; }
public Original original { get; set; }
}
public class Original
{
public string source { get; set; }
public int width { get; set; }
public int height { get; set; }
}
public class Normalized
{
public string from { get; set; }
public string to { get; set; }
}
Which is OK and what I would expect, except for the class _38930, which is just the pageid and would change with every query.
What is the correct way to deserialize this object? Or is it a better approach to just get a object as response and fill the model class manually in this case?
Additionally, I actually only need certain parameters from the JSON object (e.g. title, extract, description,..) - is there a way to get these directly into a model class containing only the properties I need?
This is the way to do it natively, Pages is actually a Dictionary<int, Page>.
public class WikiArticleModel
{
public string batchcomplete { get; set; }
public Query query { get; set; }
}
public class Query
{
public List<Normalized> normalized { get; set; }
public Pages pages { get; set; }
}
[JsonDictionary]
public class Pages : Dictionary<int, Page> { }
public class Page
{
public int pageid { get; set; }
public int ns { get; set; }
public string title { get; set; }
public string extract { get; set; }
public string description { get; set; }
public string descriptionsource { get; set; }
public Original original { get; set; }
}
public class Original
{
public string source { get; set; }
public int width { get; set; }
public int height { get; set; }
}
public class Normalized
{
public string from { get; set; }
public string to { get; set; }
}
I would recommend using JObject.Parse from Newtonsoft.Json.Linq and parsing it based on the name of the keys that page has. Something like this,
public class Page
{
public int pageid { get; set; }
public int ns { get; set; }
public string title { get; set; }
public string extract { get; set; }
public string description { get; set; }
public string descriptionsource { get; set; }
public Original original { get; set; }
}
public class Original
{
public string source { get; set; }
public int width { get; set; }
public int height { get; set; }
}
public class Normalized
{
public string from { get; set; }
public string to { get; set; }
}
// you can deserialize like this,
var jobj = JObject.Parse(json);
var props = ((JObject)jobj["query"]["pages"]).Properties();
Page page = JsonConvert.DeserializeObject<Page>(jobj["query"]["pages"][props.First().Name].ToString());
You can use a foreach loop on each of the properties of pages and iterate through those as well (instead of using props.First().
I have a JSON document and I want to access the details of the STATUS SECTION but it keeps returning null.
JSON Data is as shown:
{
"results":[
{
"messageId":"15712480583306574",
"to":"",
"from":"TestServer",
"sentAt":"2019-10-16T17:47:38.368+0000",
"doneAt":"2019-10-16T17:47:38.370+0000",
"smsCount":1,
"mccMnc":"null",
"price":{
"pricePerMessage":0.0,
"currency":"USD"
},
"status":{
"groupId":5,
"groupName":"REJECTED",
"id":8,
"name":"REJECTED_PREFIX_MISSING",
"description":"Number prefix missing"
},
"error":{
"groupId":0,
"groupName":"OK",
"id":0,
"name":"NO_ERROR",
"description":"No Error",
"permanent":false
}
}
]
}
C# Code is:
string JsonData = response.Content.ToString();
dynamic results = JsonConvert.DeserializeObject<dynamic>(JsonData);
var statuses = results.status;
foreach(var stat in statuses) {
string groupname = stat.groupName.Value;
string name = stat.name.Value;
string description = stat.description.Value;
}
It keeps returning null, How can I access these members? I am using Newtonsoft.
If you want to access the status object property you need to rewrite your whole code.
string JsonData = response.Content.ToString();
var input = JObject.Parse(str);
var results = input["results"].Children();
var status = results.First()["status"];
string groupname = status["groupName"].ToString();
string name = status["name"].ToString();
string description = status["description"].ToString();
Console.WriteLine(groupname);
Console.WriteLine(name);
Console.WriteLine(description);
The result in Console
REJECTED
REJECTED_PREFIX_MISSING
Number prefix missing
But I would rather use concrete class. You need to create multiple classes. Here is good example.
public class Envelope
{
public List<Item> Results { get; set; }
}
public class Item
{
public Status Status { get; set; }
}
public class Status
{
public int GroupId { get; set; }
public string GroupName { get; set; }
public int Id { get; set; }
public string Name { get; set; }
public string Description { get; set; }
}
After that the usage is much simpler.
string JsonData = response.Content.ToString();
MyEnvelope envelope = JsonConvert.DeserializeObject<MyEnvelope>(JsonData);
var status = envelope.results[0].status;
Console.WriteLine(status.GroupName);
Console.WriteLine(status.Name);
Console.WriteLine(status.Description);
Finest Option: Create A model for the JSON.
public class Price
{
public double pricePerMessage { get; set; }
public string currency { get; set; }
}
public class Status
{
public int groupId { get; set; }
public string groupName { get; set; }
public int id { get; set; }
public string name { get; set; }
public string description { get; set; }
}
public class Error
{
public int groupId { get; set; }
public string groupName { get; set; }
public int id { get; set; }
public string name { get; set; }
public string description { get; set; }
public bool permanent { get; set; }
}
public class Result
{
public string messageId { get; set; }
public string to { get; set; }
public string from { get; set; }
public DateTime sentAt { get; set; }
public DateTime doneAt { get; set; }
public int smsCount { get; set; }
public string mccMnc { get; set; }
public Price price { get; set; }
public Status status { get; set; }
public Error error { get; set; }
}
public class RootObject
{
public List<Result> results { get; set; }
}
Then do RootObject results = JsonConvert.DeserializeObject<RootObject>(JsonData);
Fair Option: Get the exact JToken you want.
using System;
using Newtonsoft.Json;
using Newtonsoft.Json.Serialization;
using Newtonsoft.Json.Linq;
public class Program
{
public static void Main()
{
string jsonData = "{\"results\":[{\"messageId\":\"15712480583306574\",\"to\":\"\",\"from\":\"TestServer\",\"sentAt\":\"2019-10-16T17:47:38.368+0000\",\"doneAt\":\"2019-10-16T17:47:38.370+0000\",\"smsCount\":1,\"mccMnc\":\"null\",\"price\":{\"pricePerMessage\":0.0,\"currency\":\"USD\"},\"status\":{\"groupId\":5,\"groupName\":\"REJECTED\",\"id\":8,\"name\":\"REJECTED_PREFIX_MISSING\",\"description\":\"Number prefix missing\"},\"error\":{\"groupId\":0,\"groupName\":\"OK\",\"id\":0,\"name\":\"NO_ERROR\",\"description\":\"No Error\",\"permanent\":false}}]}";
JObject jObject = JObject.Parse(jsonData);
Console.WriteLine(jObject.SelectToken("results[0].status"));
}
}
I have referred to this question, which is similar to my issue but unable to fix the issue completely since the data structure is different and I am not able to figure-out how to apply this solution to my example data given below:
{
"result": {
"RITM2572913": {
"number": "RITM2572913",
"state": "1",
"stage": "fulfillment",
"Sys_ID": "220e89681b31b384e3a0a79b2d4bcbf3",
"requested_for": "1d1673c4dbda5b0072a85099dc9619b0",
"Contoso_requested_for": "requested_for:1d1673c4dbda5b0072a85099dc9619b0,var_name_arr:",
"Contoso_sc_Purposeofthef5request": "Add",
"Contoso_Sc_Contactinfo": "Contact ",
"Contoso_sc_Appname": "Application ",
"Contoso_sc_Description": "Description",
"Contoso_special_instructions": "special_instructions:",
"business_justification": "Justification ",
"Contoso_business_justification": "busess_justification:Justification",
"Contoso_catalog_item_footer": "owner_info:"
}
}
}
I have the response data like this and need to de-serialize it to fit in the object model given below:
public class RITMGETRequestResponse
{
public RITMDetails result { get; set; }
public class RITMDetails
{
public string business_justification { get; set; }
public string number { get; set; }
public string requested_for { get; set; }
public string stage { get; set; }
public string state { get; set; }
public string Sys_ID { get; set; }
public string var_name_arr { get; set; }
public string Contoso_business_justification { get; set; }
public string Contoso_catalog_item_footer { get; set; }
public string Contoso_requested_for { get; set; }
public string Contoso_sc_Appname { get; set; }
public string Contoso_Sc_Contactinfo { get; set; }
public string Contoso_sc_Description { get; set; }
public string Contoso_sc_Purposeofthef5request { get; set; }
public string Contoso_special_instructions { get; set; }
}
}
In this case RITM number is dynamic. I need to get the Sys_ID and other properties of this JSON. How do I de-serialize this JSON response to get these values?
straightforward example:
used a JSONProperty attribute to map result values of a dynamic property name
class Program
{
static void Main(string[] args)
{
var deserialise = JsonConvert.DeserializeObject<RITMRequestResponse>("{\"result\": {\"123\" : { \"number\" : \"123\" }}}");
Console.WriteLine(deserialise);
Console.ReadLine();
}
}
public class RITMRequestResponse
{
[JsonProperty(PropertyName = "result")]
public Dictionary<string, RITMDetails> RITMDetails { get; set; }
}
public class RITMDetails
{
public string Number { get; set; }
}
i have following javascript object it looks like json but when i parse it as json i am getting errors:
{
"1": {
"name": "Manheim Simulcast ",
"items": {
"2": {
"pos": "52",
"name": "NY - Manheim Albany",
"address": "",
"zip": "12201",
"coords": ""
}
}
}
}
and following classes:
public class auction_js_min
{
public auction_id auction_id { set; get; }
}
public class auction_id
{
public string name { set; get; }
public Items items { set; get; }
}
public class Items
{
public Sub_auction_id sub_auction_id { set; get; }
}
public class Sub_auction_id
{
public string pos { get; set; }
public string name { get; set; }
public string address { get; set; }
public string zip { get; set; }
public string coords { get; set; }
}
when i deserialize it to C# object im getting empty object:
auction_js_min obj = JsonConvert.DeserializeObject<auction_js_min>(auction_js);
is any idea how to fix it? javascript object is too big 87000 symbol and i want iterate over objects and check values.
I think what you're running into here is that your objects are numbered and you can't name a class with just number. In this case your model doesn't match your JSON so all you're going to get is null. You need to modify your model to match the JSON you have and then you can map that DTO model to something nicer to use in C#.
Here's an example model that deserializes your JSON:
public class auction_id
{
public string name { set; get; }
public IDictionary<int, Sub_auction_id> items { set; get; }
}
public class Sub_auction_id
{
public string pos { get; set; }
public string name { get; set; }
public string address { get; set; }
public string zip { get; set; }
public string coords { get; set; }
}
And then deserialize like so:
public void Deserialize()
{
var auction = JsonConvert.DeserializeObject<IDictionary<int, auction_id>>(json);
}
I think you can make use of JsonProperty here.
Usually these names are invalid but they could be parsed like this.
public class auction_js_min
{
[JsonProperty("1")]
public auction_id auction_id { set; get; }
}
public class auction_id
{
public string name { set; get; }
public Items items { set; get; }
}
public class Items
{
[JsonProperty("2")]
public Sub_auction_id sub_auction_id { set; get; }
}
public class Sub_auction_id
{
public string pos { get; set; }
public string name { get; set; }
public string address { get; set; }
public string zip { get; set; }
public string coords { get; set; }
}
Thats because of single quotes. Both of the following will work:
If you know your object is correct, skip the string quotation and directly eval it:
eval({'1': {'name': 'Manheim Simulcast','items':{'2':{'pos': '52','name': 'NY - Manheim Albany','address': '','zip': '12201','coords': ''}}}})
Or use double quotes inside JSON and single quotes to make it a string likr this:
JSON.parse('{"1": {"name": "Manheim Simulcast","items":{"2":{"pos": "52","name": "NY - Manheim Albany","address": "","zip": "12201","coords": ""}}}}')
As far as parsing them to a C# object. It can be multiple things, need more details.