Develop Reference

Converting dynamic property to json dictionary type

I have the "json" mentioned below. "changes" property is changeable
{"sort":[{"field":"recid","direction":"desc"}],"changes":[{"recid":2084,"LokasyonAdresi":"211","LokasyonAdi":"111"}],"action":"save"}
When I convert json to c# classes, the following classes are created.
public class Sort
{
public string field { get; set; }
public string direction { get; set; }
}
public class Change
{
public int recid { get; set; }
public string LokasyonAdresi { get; set; }
public string LokasyonAdi { get; set; }
}
public class Root
{
public List<Sort> sort { get; set; }
public List<Change> changes { get; set; }
public string action { get; set; }
}
I want the class I want to convert to be like this. How can I customize?
public class Root
{
[JsonPropertyName("sort")]
public IList<Sort> Sort { get; set; }
[JsonPropertyName("action")]
public string Action { get; set; }
[JsonPropertyName("changes")]
public IDictionary<string, object> Changes { get; set; }
}

try this code
var jsonParsed = JObject.Parse(json);
Dictionary<string,object> changes=((JArray)jsonParsed["changes"])
.SelectMany(x=> x.ToObject<Dictionary<string,object>>())
.ToDictionary(kvp=>kvp.Key,kvp=>kvp.Value);
List<Sort> sort= ((JArray) jsonParsed["sort"]).Select(x=> x.ToObject<Sort>()).ToList();
var data = new Root {
Action= (string) jsonParsed["action"],
Sort= sort,
Changes=changes
};

How do I deserialize JSON correctly in C#

I am trying to deserialize the Supreme New York JSON but I am getting an error.
I used json2csharp.com to convert the Json into classes.
Then I summarised them all into one called items
namespace SUPBOTTESTING
{
public class items
{
public string name { get; set; }
public int id { get; set; }
public string image_url { get; set; }
public string image_url_hi { get; set; }
public int price { get; set; }
public int sale_price { get; set; }
public bool new_item { get; set; }
public int position { get; set; }
public string category_name { get; set; }
public int price_euro { get; set; }
public int sale_price_euro { get; set; }
}
}
using System;
using System.Net;
using System.Web.Script.Serialization;
namespace SUPBOTTESTING
{
class Program
{
public static void Main()
{
{
string shop_json = new WebClient().DownloadString("https://www.supremenewyork.com/mobile_stock.json");
JavaScriptSerializer shop_object = new JavaScriptSerializer();
items[] shirt_stock = shop_object.Deserialize<items[]>(shop_json);
Console.WriteLine(shirt_stock[1]);
}
}
}
}
I am getting the error:
Default constructor not found for type SUPBOTTESTING.items[]

Ok here is the solution. You have the correct idea but you need to understand the structure of your Json data.
You are deserializing it into an array of Object whereas your Json data returned itself is not an Array or a List. It contains child nodes that are an array so you need to structure your Object accordingly to get a successful breakdown of data.
Here I have used Newtonsoft to deserialise the Json data into an Object.
I have tested the code and it returns a list of Shirts
static void Main(string[] args)
{
var shop_json = new WebClient().DownloadString("https://www.supremenewyork.com/mobile_stock.json");
var shirt_stock = JsonConvert.DeserializeObject<StockObject>(shop_json);
// Picking shirts to demonstrate how to display values for all shirts
var shirts = shirt_stock.products_and_categories.Shirts;
foreach (var shirt in shirts)
{
var shirtBuilder = new StringBuilder();
shirtBuilder.AppendLine($"Name: {shirt.name}");
shirtBuilder.AppendLine($"ID: {shirt.id.ToString()}");
shirtBuilder.AppendLine($"New Item: {shirt.new_item.ToString()}");
shirtBuilder.AppendLine($"Category Name: {shirt.category_name}");
Console.WriteLine(shirtBuilder);
}
}
public class StockObject
{
public ProductsCats Products_and_categories { get; set; }
}
public class ProductsCats
{
public Details[] Shirts { get; set; }
public Details[] Bags { get; set; }
public Details[] Accessories { get; set; }
public Details[] Pants { get; set; }
public Details[] Jackets { get; set; }
public Details[] Skates { get; set; }
public Details[] Hats { get; set;}
public Details[] Sweatshirts { get; set;}
[JsonProperty("Tops/Sweaters")]
public Details[] TopsSweaters { get;set;}
public Details[] New { get; set; }
}
public class Details
{
public string name { get; set; }
public int id { get; set; }
public string image_url { get; set; }
public string image_url_hi { get; set; }
public int price { get; set; }
public int sale_price { get; set; }
public bool new_item { get; set; }
public int position { get; set; }
public string category_name { get; set; }
public int price_euro { get; set; }
public int sale_price_euro { get; set; }
}
You see what I have done here?
So your Json data contains a parent node products_and_categories and its child node contains an array of Shirts which is what you are after?
StockObject class contains the Parent property called Products_and_categories of type object ProductsCats.
ProductsCats Object contains the property Shirts of type Details which is an array and will be used during the deserialising process.
Hope this helps?

Well you do not need to specify a default constructor. What is wrong is, i think you didn't check the json data properly. Because your items class is not in the first level of json. You need to create a couple of classes to be more accurate on deserializing.
First of all you need to know that this json file has a lot of bad-smells and bad-practices on it.
Note that you need to install Newtonsoft.Json before going further. It is much more convenient way to deserialize a json into C# classes.
Yet, i wrote a proper way of deserializing it:
public class BaseItem
{
public string Name { get; set; }
public int Id { get; set; }
public string Image_url { get; set; }
public string Image_url_hi { get; set; }
public int Price { get; set; }
public int Sale_price { get; set; }
public bool New_item { get; set; }
public int Position { get; set; }
public string Category_name { get; set; }
public int Price_euro { get; set; }
public int Sale_price_euro { get; set; }
}
public class Shirt : BaseItem { }
public class Bag : BaseItem { }
public class Accessory : BaseItem { }
public class Pant : BaseItem { }
public class Jacket : BaseItem { }
public class Skate : BaseItem { }
public class Hat : BaseItem { }
public class Sweatshirt : BaseItem { }
public class TopsSweater : BaseItem { }
public class New : BaseItem { }
public class RootObject
{
public List<object> Unique_image_url_prefixes { get; set; }
public ProductsAndCategories Products_and_categories { get; set; }
public string Release_date { get; set; }
public string Release_week { get; set; }
}
public class ProductsAndCategories
{
public List<Shirt> Shirts { get; set; }
public List<Bag> Bags { get; set; }
public List<Accessory> Accessories { get; set; }
public List<Pant> Pants { get; set; }
public List<Jacket> Jackets { get; set; }
public List<Skate> Skate { get; set; }
public List<Hat> Hats { get; set; }
public List<Sweatshirt> Sweatshirts { get; set; }
[JsonProperty("Tops/Sweaters")]
public List<TopsSweater> TopsSweaters { get; set; }
public List<New> New { get; set; }
}
First of all, all of your items are have the same properties on them, yet, they all marked as different properties. So that, i created a BaseItem class and other empty classes which are inherited from that.
Also you need other 2 classes -which are RootObject and ProductsAndCategories- to provide data on them. Note that there is a JsonProperty("blabla") on the TopsSweaters property. Because, in json file it is Tops/Sweaters, and you can not use that name on a C# property. That is the attribute for using that kind of different property names.
Then you can populate your object like this:
static void Main(string[] args)
{
var jsonData = "https://www.supremenewyork.com/mobile_stock.json";
string shopJson = new WebClient().DownloadString(jsonData);
RootObject shirtStock = JsonConvert.DeserializeObject<RootObject>(shopJson); //All json data is in this variable
Console.WriteLine(shirtStock.Products_and_categories.Shirts[1]);
}

Your problem is that youre using a class to load the JSON data in, where you should use a struct, alternatively you can also create a constructor that takes no arguments and sets all variables to default values, which is a lot of work so just replace class with struct:
public struct Items
{
public string Name { get; set; }
public int Id { get; set; }
public string Image_Url { get; set; }
public string Image_Url_Hi { get; set; }
public int Price { get; set; }
public int Sale_Price { get; set; }
public bool New_item { get; set; }
public int Position { get; set; }
public string Category_Name { get; set; }
public int Price_Euro { get; set; }
public int Sale_Price_Euro { get; set; }
}
Also please stick to C# naming conventions, you should be able to do this since most JSON parsers are case insensitive by default.
Some more info: A class doesnt really has a proper default constructor if you dont define one, where as a struct always has a default constructor, so when the JSON parser wants to init your class it cant because a default constructor isnt definded.

static void Main(string[] args)
{
string shop_json = new WebClient().DownloadString("https://www.supremenewyork.com/mobile_stock.json");
JavaScriptSerializer shop_object = new JavaScriptSerializer();
var shirt_stock = shop_object.Deserialize<NewYarkItems>(shop_json);
var v = shirt_stock;
}
public class NewYarkItems
{
public dynamic unique_image_url_prefixes { get; set; }
public products_and_categories products_And_Categories { get; set; }
public string release_date { get; set; }
public string release_week { get; set; }
}
public class products_and_categories
{
public List<items> Jackets { get; set; }
}
public class items
{
public string name { get; set; }
public int id { get; set; }
public string image_url { get; set; }
public string image_url_hi { get; set; }
public int price { get; set; }
public int sale_price { get; set; }
public bool new_item { get; set; }
public int position { get; set; }
public string category_name { get; set; }
public int price_euro { get; set; }
public int sale_price_euro { get; set; }
}

Need assign List object parsed from JSON file to a object property

I trying to build Magic The Gathering card viewer and getting data from json. I have created json file, then copy all and paste special to my class to generate a model. In constructor using json parser I parsed object fine, but when I try to assign to that object property, so I can make method retrieve all cards. But when I trying to do that it says that I can't implicitly assign. I try to assign Cards = cardsCollection; that where it throws an error.
namespace MTGArena
{
public class Cards
{
public class Rootobject
{
static Rootobject()
{
using (StreamReader file = new StreamReader("cards.json"))
{
string json = file.ReadToEnd();
Rootobject cardsCollection = JsonConvert.DeserializeObject<Rootobject>(json);
Cards = cardsCollection;
}
}
public static List<Card> Cards { get; set; }
public static List<Card> GetCards()
{
return Cards;
}
}
}
public class Card
{
public string name { get; set; }
public string set { get; set; }
public Images images { get; set; }
public string type { get; set; }
public string[] cost { get; set; }
public int cmc { get; set; }
public string rarity { get; set; }
public string cid { get; set; }
public int?[] frame { get; set; }
public string artist { get; set; }
public string dfc { get; set; }
public bool collectible { get; set; }
public bool craftable { get; set; }
public int dfcId { get; set; }
public int rank { get; set; }
public string grpId { get; set; }
}
public class Images
{
public string small { get; set; }
public string normal { get; set; }
public string large { get; set; }
public string art_crop { get; set; }
}
}

Change the line:
Rootobject cardsCollection = JsonConvert.DeserializeObject<Rootobject>(json);
for:
var cardsCollection = JsonConvert.DeserializeObject<List<Card>>(json);

You need to use below syntax
IList<Card> cards = cardsCollection;
dont create empty Cards class. It has no use

How do you get the selling_price? (Xamarin Forms)

This is my code:
dynamic resultObject = JsonConvert.DeserializeObject(Result);
string final = JsonConvert.SerializeObject(resultObject);
This my the result of final (JSON):
How do get the selling_price field? like doing final.selling_price?
My class:
public class ItemPriceJson {
public string item_price_id { get; set; }
public string item_code { get; set; }
public string item_desc { get; set; }
public string trnx_unit { get; set; }
public string price_level_id { get; set; }
public string price_level_code { get; set; }
public string selling_price { get; set; }
} // itemPriceJson

You're not deserializing the json to a dynamic object properly. First of all, it's an array, not an object.
So, try it like this:
dynamic resultObject = JArray.Parse(Result); //Dynamic object.
var sellingPrice = resultObject[0].selling_price; //Get the selling price. Could also use some casting here.

You should change your class to
public class ItemPriceJson {
public int item_price_id { get; set; }
public string item_code { get; set; }
public string item_desc { get; set; }
public string trnx_unit { get; set; }
public int price_level_id { get; set; }
public string price_level_code { get; set; }
public int selling_price { get; set; }
} // itemPriceJson
and deserialize it with
var results = JsonConvert.DeserializeObject<List<ItemPriceJson>>( Result );
because the json result contains an array of objects and so you need a collection for deserialization

Create a POCO class which describes the object for example;
public class MyItemObject
{
public string item_price_id { get; set; }
public string item_desc { get; set; }
public string trnx_unit { get; set; }
}
Then use JsonConvert to deserialize a instance of the object.
var result = JsonConvert.DeserializeObject<MyItemObject>(json);
EDIT
As json is a list/collection deserialize as a list type;
var listResult = JsonConvert.DeserializeObject<List<MyItemObject>>(json);

public class ItemPriceJson {
public string item_price_id { get; set; }
public string item_code { get; set; }
public string item_desc { get; set; }
public string trnx_unit { get; set; }
public string price_level_id { get; set; }
public string price_level_code { get; set; }
public string selling_price { get; set; }
}
And you can use the Newtonsoft json library
var result = JsonConvert.DeserializeObject<List<ItemPriceJson>>(jsonstring);

Custom JSON, convert to object

I have the result of an API call which looks like:
{"Operations":[{"OperationId":"2","OperationObjectId":"Application","OperationName":"UnlockSession","OperationParameters":[{"Name":"viewModel","Value":"model"},{"Name":"returnUrl","Value":"https://"}],"OperationCaller":{"UserPrincipalName":"bob","ClientIPAddress":""},"OperationResult":"Succeeded","OperationStatus":200,"OperationRequest":{"Method":"POST","Url":""},"OperationStartedTime":"2013-08-20T12:04:17.5462357Z","OperationCompletedTime":"2013-08-20T12:04:17.9979469Z"}],"ContinuationToken":null}
Ideally I want to convert it to an object so I can do stuff like:
object.OperationObjectID; // gives Application
object.Method; // gives POST
object.OperationResult; // gives Succeeded
Does any one know how that is done? Does the JSON parse need to be aware of the format?
Thanks,
Andrew

you can use Json.Net as below
dynamic object = JObject.Parse(yorjsonstring);
object.Operations[0].OperationObjectID;
object.Operations[0].Method;
object.Operations[0].OperationResult;
rather than using dynamic object you can generate classes for your json and serialize to those classes like below.
you can get help of http://json2csharp.com/ site for generate classes
public class OperationParameter
{
public string Name { get; set; }
public string Value { get; set; }
}
public class OperationCaller
{
public string UserPrincipalName { get; set; }
public string ClientIPAddress { get; set; }
}
public class OperationRequest
{
public string Method { get; set; }
public string Url { get; set; }
}
public class Operation
{
public string OperationId { get; set; }
public string OperationObjectId { get; set; }
public string OperationName { get; set; }
public List<OperationParameter> OperationParameters { get; set; }
public OperationCaller OperationCaller { get; set; }
public string OperationResult { get; set; }
public int OperationStatus { get; set; }
public OperationRequest OperationRequest { get; set; }
public string OperationStartedTime { get; set; }
public string OperationCompletedTime { get; set; }
}
public class RootObject
{
public List<Operation> Operations { get; set; }
public object ContinuationToken { get; set; }
}
then
RootObject obj = JsonConvert.DeserializeObject<RootObject>(jsonstring);
obj.Operations[0].OperationObjectID;

Try to use JavaScriptSerializer class: http://msdn.microsoft.com/ru-ru/library/system.web.script.serialization.javascriptserializer.aspx.