i can't deserialize changeable attribute date on my json api - c#

I am use api use variable date whene date change the object name change like this if i have to get data of this day i use this :https://api.covid19tracking.narrativa.com/api/2020-11-05/country/us
and the result of json object is like this :
and if i have to choose other date i change the date and the variable of date object is change like this if i have to get data of 2020-10-11 ,i calll this:
https://api.covid19tracking.narrativa.com/api/2020-11-05/country/us , and this is image show the result and the change of object date
the problem is if i deserialize the api i get result from , metadata object ,total object , updated_at , and dates object and the other object date and countries give me this error
:NullReferenceException: Object reference not set to an instance of an object
I use https://json2csharp.com/ to get class from json and this is my code :
var client = new RestClient("https://api.covid19tracking.narrativa.com/api/2020-11-05/country/us");
client.Timeout = -1;
var request = new RestRequest(Method.GET);
// request.OnBeforeDeserialization = resp => { resp.ContentType = "application/json"; };
Root response = client.Execute<Root>(request)?.Data;
var paystoday_confirmed = response?.dates.date.countries.US.today_confirmed;
if (paystoday_confirmed != null)
{
Debug.Log("Confirmed :" + paystoday_confirmed);
}
and this is my object's
public class Link
{
public string href { get; set; }
public string rel { get; set; }
public string type { get; set; }
}
public class Link2
{
public string href { get; set; }
public string rel { get; set; }
public string type { get; set; }
}
public class SubRegion
{
public string date { get; set; }
public string id { get; set; }
public string name { get; set; }
public string name_es { get; set; }
public string name_it { get; set; }
public string source { get; set; }
public int today_confirmed { get; set; }
public int today_deaths { get; set; }
public int today_new_confirmed { get; set; }
public int today_new_deaths { get; set; }
public int today_new_recovered { get; set; }
public int today_recovered { get; set; }
public double? today_vs_yesterday_confirmed { get; set; }
public double? today_vs_yesterday_deaths { get; set; }
public object today_vs_yesterday_recovered { get; set; }
public int yesterday_confirmed { get; set; }
public int yesterday_deaths { get; set; }
public int yesterday_recovered { get; set; }
}
public class Region
{
public string date { get; set; }
public string id { get; set; }
public List<Link2> links { get; set; }
public string name { get; set; }
public string name_es { get; set; }
public string name_it { get; set; }
public string source { get; set; }
public List<SubRegion> sub_regions { get; set; }
public int today_confirmed { get; set; }
public int today_deaths { get; set; }
public int today_new_confirmed { get; set; }
public int today_new_deaths { get; set; }
public int today_new_open_cases { get; set; }
public int today_new_recovered { get; set; }
public int today_new_tests { get; set; }
public int today_new_total_hospitalised_patients { get; set; }
public int today_open_cases { get; set; }
public int today_recovered { get; set; }
public int today_tests { get; set; }
public int today_total_hospitalised_patients { get; set; }
public double? today_vs_yesterday_confirmed { get; set; }
public double? today_vs_yesterday_deaths { get; set; }
public double today_vs_yesterday_open_cases { get; set; }
public double? today_vs_yesterday_recovered { get; set; }
public double today_vs_yesterday_tests { get; set; }
public double? today_vs_yesterday_total_hospitalised_patients { get; set; }
public int yesterday_confirmed { get; set; }
public int yesterday_deaths { get; set; }
public int yesterday_open_cases { get; set; }
public int yesterday_recovered { get; set; }
public int yesterday_tests { get; set; }
public int yesterday_total_hospitalised_patients { get; set; }
}
public class US
{
public string date { get; set; }
public string id { get; set; }
public List<Link> links { get; set; }
public string name { get; set; }
public string name_es { get; set; }
public string name_it { get; set; }
public List<Region> regions { get; set; }
public string source { get; set; }
public int today_confirmed { get; set; }
public int today_deaths { get; set; }
public int today_new_confirmed { get; set; }
public int today_new_deaths { get; set; }
public int today_new_open_cases { get; set; }
public int today_new_recovered { get; set; }
public int today_open_cases { get; set; }
public int today_recovered { get; set; }
public double today_vs_yesterday_confirmed { get; set; }
public double today_vs_yesterday_deaths { get; set; }
public double today_vs_yesterday_open_cases { get; set; }
public double today_vs_yesterday_recovered { get; set; }
public int yesterday_confirmed { get; set; }
public int yesterday_deaths { get; set; }
public int yesterday_open_cases { get; set; }
public int yesterday_recovered { get; set; }
}
public class Countries
{
public US US { get; set; }
}
public class Info
{
public string date { get; set; }
public string date_generation { get; set; }
public string yesterday { get; set; }
}
public class _20201102
{
public Countries countries { get; set; }
public Info info { get; set; }
}
public class Dates
{
[JsonProperty("2020-11-02")]
public _20201102 date { get; set; }
}
public class Metadata
{
public string by { get; set; }
public List<string> url { get; set; }
}
public class Total
{
public string date { get; set; }
public string name { get; set; }
public string name_es { get; set; }
public string name_it { get; set; }
public string rid { get; set; }
public string source { get; set; }
public int today_confirmed { get; set; }
public int today_deaths { get; set; }
public int today_new_confirmed { get; set; }
public int today_new_deaths { get; set; }
public int today_new_open_cases { get; set; }
public int today_new_recovered { get; set; }
public int today_open_cases { get; set; }
public int today_recovered { get; set; }
public double today_vs_yesterday_confirmed { get; set; }
public double today_vs_yesterday_deaths { get; set; }
public double today_vs_yesterday_open_cases { get; set; }
public double today_vs_yesterday_recovered { get; set; }
public int yesterday_confirmed { get; set; }
public int yesterday_deaths { get; set; }
public int yesterday_open_cases { get; set; }
public int yesterday_recovered { get; set; }
}
public class Root
{
public Dates dates { get; set; }
public Metadata metadata { get; set; }
public Total total { get; set; }
public string updated_at { get; set; }
}
And this is the error on unity


It will work best if you use dictionaries.
You can make your dates and countries property a dictionary.
dates - Dates needs to be a dictionary because you can get data for different dates so the date will change
countries - The service u are using support other countries. If you change the countries to a dictionary, then the structure below should work for any country, not just for US.
Your code structure will then look something like this:
public class Root
{
public Dictionary<string, Date> dates {get;set;}
public Metadata metadata { get; set; }
public Total total { get; set; }
public string updated_at { get; set; }
}
public class Date
{
public Dictionary<string, Country> countries {get;set;}
public Info info {get;set;}
}
public class Country
{
....
//Country properties here
}
public class Info
{
....
//Info properties here
}
public class Metadata
{
....
//Metadata properties here
}
public class Total
{
....
//Total properties here
}
you should then be able to process the data as follow
foreach(var kvp in root.dates)
{
// the key will be the date eg. '2020-11-05'.
// This you can convert to a date using DateTime.Parse() if you need too.
Console.WriteLine(kvp.Key);
// The value will be the Date object
var dateObj = kvp.Value;
var info = dateObj.info;
foreach(var kvp2 in dateObj.countries)
{
Console.WriteLine(kvp2.Key); // this will be the country eg. 'US'
var countryDetails = kvp2.Value // this will be the Country object
}
}
Or just change your code too:
(note: you will need to know exactly what date was returned)
var paystoday_confirmed = response?.dates["2020-11-05"].countries["US"].today_confirmed;
if (paystoday_confirmed != null)
{
Debug.Log("Confirmed :" + paystoday_confirmed);
}


As already stated in the Comments your main issue here is that you hardcoded
public class Dates
{
[JsonProperty("2020-11-02")]
public _20201102 date { get; set; }
}
But as you can see in your second result the date simply is not 2020-11-02 but rather 2020-10-11!
Therefore in this case there is no object in the json representing the data object => It will be the default reference value null.
So how to solve this?
You could instead use a Dictionary .. however it depends a lot on how your JSON library works. I know that at least with JSON .Net the following should work
public class Root
{
public Dictionary<string, Date> dates { get; set; }
public Metadata metadata { get; set; }
public Total total { get; set; }
public string updated_at { get; set; }
}
public class Date
{
public Dictionary<string, Country> countries { get; set; }
public Info info { get; set; }
}
public class Country
{
public string date { get; set; }
public string id { get; set; }
public List<Link> links { get; set; }
public string name { get; set; }
public string name_es { get; set; }
public string name_it { get; set; }
public List<Region> regions { get; set; }
public string source { get; set; }
public int today_confirmed { get; set; }
public int today_deaths { get; set; }
public int today_new_confirmed { get; set; }
public int today_new_deaths { get; set; }
public int today_new_open_cases { get; set; }
public int today_new_recovered { get; set; }
public int today_open_cases { get; set; }
public int today_recovered { get; set; }
public double today_vs_yesterday_confirmed { get; set; }
public double today_vs_yesterday_deaths { get; set; }
public double today_vs_yesterday_open_cases { get; set; }
public double today_vs_yesterday_recovered { get; set; }
public int yesterday_confirmed { get; set; }
public int yesterday_deaths { get; set; }
public int yesterday_open_cases { get; set; }
public int yesterday_recovered { get; set; }
}
This also sounds more logic since dates indicates that there might be more then one item. And also countries sounds like there might not only be US but also other countries, maybe even multiple entries.
You would then access that e.g. like
foreach(var date in response.dates)
{
foreach(var country in date.value)
{
var paystoday_confirmed = country.value.today_confirmed;
Debug.Log($"Confirmed {paystoday_confirmed} cases for the {date.key} in {country.key}");
}
}
As complete alternative in the case you only need one certain field of your request anyway you could also use SimpleJson (simply copy the provided scripts somewhere into your project) and access them like
var root = JSON.Parse(theJsonString);
var paystoday_confirmed = root["Dates"]["2020-11-05"]["countries"]["US"]["today_confirmed"].AsInt();
For both solutions you will have to get rid of that RestClient package and rather do the UnityWebRequest.Get yourself and use the returned string instead.

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public int yesterday_open_cases { get; set; }
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public string rel { get; set; }
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public string id { get; set; }
public string name { get; set; }
public string name_es { get; set; }
public string name_it { get; set; }
public string source { get; set; }
public int today_confirmed { get; set; }
public int today_deaths { get; set; }
public int today_new_confirmed { get; set; }
public int today_new_deaths { get; set; }
public int today_new_recovered { get; set; }
public int today_recovered { get; set; }
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public float? today_vs_yesterday_deaths { get; set; }
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public int yesterday_deaths { get; set; }
public int yesterday_recovered { get; set; }
}
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{
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public string date_generation { get; set; }
public string yesterday { get; set; }
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{
public string by { get; set; }
public string[] url { get; set; }
}
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{
public string date { get; set; }
public string name { get; set; }
public string name_es { get; set; }
public string name_it { get; set; }
public string rid { get; set; }
public string source { get; set; }
public int today_confirmed { get; set; }
public int today_deaths { get; set; }
public int today_new_confirmed { get; set; }
public int today_new_deaths { get; set; }
public int today_new_open_cases { get; set; }
public int today_new_recovered { get; set; }
public int today_open_cases { get; set; }
public int today_recovered { get; set; }
public float today_vs_yesterday_confirmed { get; set; }
public float today_vs_yesterday_deaths { get; set; }
public float today_vs_yesterday_open_cases { get; set; }
public float today_vs_yesterday_recovered { get; set; }
public int yesterday_confirmed { get; set; }
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you should correctly create classes that represent your response, for that, I would recommend this site that will help with that:
(https://json2csharp.com/)
you are not using correctly RestSharp, you can use use the generic version of Execute that accept the model to parse the sent json
var client = new RestClient("https://api.covid19tracking.narrativa.com/api/2020-03-22/country/" + "us");
client.Timeout = -1;
var request = new RestRequest(Method.GET);
var response = client.Execute<Rootobject>(request)?.Data;
to access your Dates object, you only need to do so,
var dates = response?.dates

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public string InOut { get; set; }
public int PackMaster_ID { get; set; }
public int Pack_type_ID { get; set; }
}

As it was mentioned by DavidG you could create any complex types that will suit your specific needs so for example
public class TranInOutContainer
{
public List<TranInOutDtl> TranInOutDtl Dtl {get; set;}
public List<TranInOutDtlsub> TranDtlSub DtlSub {get; set;}
....
}
will be valid solution for your problem
You could also use dynamic type ofc but it should be used only if no other solution exists

Access data in JSON C# Dynamic variable

I am working with processing/consuming some data from: https://ashesescalation-api-tachyon.stardock.net/v1/products/2641/leaderboards/ladder/de5bfc9a-9092-4014-b52e-89151de42646?offset=0&count=2 (which can be opened easily in Firefox to view.)
I am able to access the data in C# by doing this:
data being the json data...
dynamic players = JArray.Parse(data);
var p = players[0];
Console.Write(p.personaName);
However I am having trouble accessing the part in the JSON data: "dataInteger" for example the "totalUnitsKilled."
p.dataInteger[0].totalUnitsKilled
That "p.dataInteger[0].totalUnitsKilled" doesn't work.
How can I access that data in C#?
Thank you very much for your help.
Warren
See image in visual studio 1
See image in visual studio 2

Kinldy take a look at my comment in your question, base on that link you need to use JsonProperty to mapped the key that has special characters and manually named it based on your needs.
Anyways, you can do the following to achieved what you need.
Copy your link to http://json2csharp.com/
Copy the generated Quicktypes and paste it to your code.
Use JsonProperty to indicate attributes on your properties for the names and manually rename properties that contains invalid_name
And DeserializeObject the object.
Here is the code:
Declare the classes from the generated quicktypes.
public class DataInteger
{
[JsonProperty(PropertyName = "totalUnitsKilled ")]
public int totalUnitsKilled { get; set; }
public int totalTitansKilled { get; set; }
public int totalTimePlayed { get; set; }
[JsonProperty(PropertyName = "substrate-TotalGamesPlayed")]
public int SubstrateTotalGamesPlayed { get; set; }
[JsonProperty(PropertyName = "phC-TotalGamesPlayed")]
public int PHCTotalGamesPlayed { get; set; }
public int lastReplayVersion { get; set; }
public int replayUploadedCount { get; set; }
}
public class RootObject
{
public string personaLadderId { get; set; }
public int rank { get; set; }
public string personaId { get; set; }
public string personaName { get; set; }
public string avatarUrl { get; set; }
public string avatarUrlSmall { get; set; }
public string avatarUrlMedium { get; set; }
public string avatarUrlLarge { get; set; }
public string ladderType { get; set; }
public string ladderId { get; set; }
public string seasonId { get; set; }
public int bracketId { get; set; }
public string bracketName { get; set; }
public int rankingScore { get; set; }
public int secondaryScore { get; set; }
public int ruleTypeId { get; set; }
public int wins { get; set; }
public int losses { get; set; }
public int ties { get; set; }
public int tieStreak { get; set; }
public int winStreak { get; set; }
public int lossStreak { get; set; }
public int longestTieStreak { get; set; }
public int longestWinStreak { get; set; }
public int longestLossStreak { get; set; }
public int bracketMaxScore { get; set; }
public int bracketScore { get; set; }
public DateTime updateDate { get; set; }
public int totalMatchesPlayed { get; set; }
public DataInteger dataInteger { get; set; }
}
Call the API (Magic begins here)
var httpClient = new HttpClient();
var link = $#"https://ashesescalation-api-tachyon.stardock.net/v1/products/2641/leaderboards/ladder/de5bfc9a-9092-4014-b52e-89151de42646?offset=0&count=2";
var response = await httpClient.GetAsync(link);
var contents = await response.Content.ReadAsStringAsync();
//deserialized json result object...
dynamic json = JsonConvert.DeserializeObject(contents);
foreach (var item in json)
{
//deserialized again the item
var data = JsonConvert.DeserializeObject<RootObject>(Convert.ToString(item));
//you can now access all the properties including dataInteger.
Console.WriteLine(Convert.ToString(data.dataInteger.totalUnitsKilled));
Console.WriteLine(Convert.ToString(data.dataInteger.totalTitansKilled));
}
Update:
If you don't want to use strongly typed class you can do parsing using JArray
JArray jsonVal = JArray.Parse(contents) as JArray;
dynamic items = jsonVal;
foreach (dynamic item in items)
{
var x = item.dataInteger;
//you can access the fields inside dataInteger.
Console.WriteLine(x["totalUnitsKilled "]);
Console.WriteLine(x["phC-TotalGamesPlayed"]);
Console.WriteLine(x["substrate-TotalGamesPlayed"]);
}
Hope this will help you.

As suggested by other users, there is a space in property name "totalUnitsKilled ", if you change it to "totalUnitsKilled". Below code will work fine:-
Console.WriteLine(p.dataInteger.totalUnitsKilled);

Your JSON string is wrong.
[{"personaLadderId":"371eaf1c-4cfe-4873-af41-56e0cb9fcf91","rank":1,"personaId":"55834d01-13f3-445e-861f-0bc4769d87cc","personaName":"Amelie","avatarUrl":"https://steamcdn-a.akamaihd.net/steamcommunity/public/images/avatars/fe/fef49e7fa7e1997310d705b2a6158ff8dc1cdfeb.jpg","avatarUrlSmall":"https://steamcdn-a.akamaihd.net/steamcommunity/public/images/avatars/fe/fef49e7fa7e1997310d705b2a6158ff8dc1cdfeb.jpg","avatarUrlMedium":"https://steamcdn-a.akamaihd.net/steamcommunity/public/images/avatars/fe/fef49e7fa7e1997310d705b2a6158ff8dc1cdfeb_medium.jpg","avatarUrlLarge":"https://steamcdn-a.akamaihd.net/steamcommunity/public/images/avatars/fe/fef49e7fa7e1997310d705b2a6158ff8dc1cdfeb_full.jpg","ladderType":"Ranked","ladderId":"de5bfc9a-9092-4014-b52e-89151de42646","seasonId":"fd7dd807-4ac2-40ec-8476-a4b2937f70af","bracketId":0,"bracketName":"Legendary","rankingScore":38,"secondaryScore":2054,"ruleTypeId":1,"wins":374,"losses":32,"ties":0,"tieStreak":0,"winStreak":8,"lossStreak":0,"longestTieStreak":0,"longestWinStreak":61,"longestLossStreak":3,"bracketMaxScore":0,"bracketScore":0,"updateDate":"2018-03-03T14:13:09.647Z","totalMatchesPlayed":406,"dataInteger":{"totalUnitsKilled ":92615,"totalTitansKilled":14,"totalTimePlayed":294676,"substrate-TotalGamesPlayed":127,"phC-TotalGamesPlayed":6,"lastReplayVersion":265301040,"replayUploadedCount":160}},{"personaLadderId":"f0dd3482-f057-44d6-a626-9c9389ad2583","rank":2,"personaId":"b53815ab-d753-4415-9ea6-03a4519c3222","personaName":"Rebellions","avatarUrl":"https://steamcdn-a.akamaihd.net/steamcommunity/public/images/avatars/b9/b9847c92d44896304cc2d673e1fbe7bc99af7f5b.jpg","avatarUrlSmall":"https://steamcdn-a.akamaihd.net/steamcommunity/public/images/avatars/b9/b9847c92d44896304cc2d673e1fbe7bc99af7f5b.jpg","avatarUrlMedium":"https://steamcdn-a.akamaihd.net/steamcommunity/public/images/avatars/b9/b9847c92d44896304cc2d673e1fbe7bc99af7f5b_medium.jpg","avatarUrlLarge":"https://steamcdn-a.akamaihd.net/steamcommunity/public/images/avatars/b9/b9847c92d44896304cc2d673e1fbe7bc99af7f5b_full.jpg","ladderType":"Ranked","ladderId":"de5bfc9a-9092-4014-b52e-89151de42646","seasonId":"fd7dd807-4ac2-40ec-8476-a4b2937f70af","bracketId":0,"bracketName":"Legendary","rankingScore":38,"secondaryScore":2049,"ruleTypeId":1,"wins":767,"losses":188,"ties":0,"tieStreak":0,"winStreak":3,"lossStreak":0,"longestTieStreak":0,"longestWinStreak":52,"longestLossStreak":6,"bracketMaxScore":0,"bracketScore":0,"updateDate":"2017-10-29T18:03:33.92Z","totalMatchesPlayed":955,"dataInteger":{"totalUnitsKilled ":293274,"totalTitansKilled":88,"totalTimePlayed":924881,"phC-TotalGamesPlayed":4,"substrate-TotalGamesPlayed":350,"lastReplayVersion":250285270,"replayUploadedCount":703}}]
There is a space in your json key name ("totalUnitsKilled ") which is ultimately converted to a variable name.
Correct your JSON key name will fix this issue. There are other keys with error as well.
You can check at http://json2csharp.com/. Wherever it is "invalid_name", key name is wrong.
public class DataInteger
{
public int __invalid_name__totalUnitsKilled { get; set; }
public int totalTitansKilled { get; set; }
public int totalTimePlayed { get; set; }
public int __invalid_name__substrate-TotalGamesPlayed { get; set; }
public int __invalid_name__phC-TotalGamesPlayed { get; set; }
public int lastReplayVersion { get; set; }
public int replayUploadedCount { get; set; }
}
public class RootObject
{
public string personaLadderId { get; set; }
public int rank { get; set; }
public string personaId { get; set; }
public string personaName { get; set; }
public string avatarUrl { get; set; }
public string avatarUrlSmall { get; set; }
public string avatarUrlMedium { get; set; }
public string avatarUrlLarge { get; set; }
public string ladderType { get; set; }
public string ladderId { get; set; }
public string seasonId { get; set; }
public int bracketId { get; set; }
public string bracketName { get; set; }
public int rankingScore { get; set; }
public int secondaryScore { get; set; }
public int ruleTypeId { get; set; }
public int wins { get; set; }
public int losses { get; set; }
public int ties { get; set; }
public int tieStreak { get; set; }
public int winStreak { get; set; }
public int lossStreak { get; set; }
public int longestTieStreak { get; set; }
public int longestWinStreak { get; set; }
public int longestLossStreak { get; set; }
public int bracketMaxScore { get; set; }
public int bracketScore { get; set; }
public DateTime updateDate { get; set; }
public int totalMatchesPlayed { get; set; }
public DataInteger dataInteger { get; set; }
}
You can use JSON.Net attributes to define C# variables related to JSON key names. Check this for more details.
Your new class should look like:
public class DataInteger
{
[JsonProperty(PropertyName = "totalUnitsKilled ")]
public int totalUnitsKilled { get; set; }
public int totalTitansKilled { get; set; }
public int totalTimePlayed { get; set; }
[JsonProperty(PropertyName = "substrate-TotalGamesPlayed")]
public int substrateTotalGamesPlayed { get; set; }
[JsonProperty(PropertyName = "phC-TotalGamesPlayed")]
public int phCTotalGamesPlayed { get; set; }
public int lastReplayVersion { get; set; }
public int replayUploadedCount { get; set; }
}

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