Assign JSON value to property in C# - c#

From an API I receive a JSON-object that looks like this:
{
"wind" : {
"speed" : 7.31,
"deg" : 187.002
},
"rain" : {
"3h" : 0
},
"clouds" : {
"all" : 92
},
"coord" : {
"lon" : 139,
"lat" : 35
},
"dt" : 1369824698,
"id" : 1851632,
"cod" : 200,
"weather" : [
{
"id" : 804,
"main" : "clouds",
"icon" : "04n",
"description" : "overcast clouds"
}
],
"main" : {
"humidity" : 89,
"temp_max" : 292.04,
"temp_min" : 287.04,
"temp" : 289.5,
"pressure" : 1013
},
"sys" : {
"country" : "JP",
"sunrise" : 1369769524,
"sunset" : 1369821049
},
"name" : "Shuzenji"
}
I would like to assign two of these values to my class:
public class Weather {
public string Name { get; set; }
public string Temp { get; set; }
}
The name I can assign like this:
weather.Name = TheJSON.name.ToString();
But the temp is trickier, because it's nested inside the "main"-array. I´ve seen many examples on how to do this in Javascript but not so much in C#. Thanks!


Main is not an array. It is an object, so
TheJSON.main.temp.ToString()


The easiest way to work with JSON data is to deserialize them as C# objects and directly use them in your application. You can use a tool like JSON C# Class Generator to automatically generate the C# class from the JSON data. Once you have your C# classes generated, you can deserialize the JSON string using the JsonConvert.DeserializeObject(jsonText); The generated code requires Newtonsoft Json.NET which you can easily add as a NuGet package.
If you save your JSON content in D:\test.json, you can use the following code to access the values using the C# objects generated. The example below is to just give you an idea on the usage.
var json = File.ReadAllText(#"D:\test.json");
var weather = JsonConvert.DeserializeObject<Weather>(json);
Console.WriteLine(weather.Name);
Console.WriteLine(weather.Sys.Country);

Related

InvalidOperationException: Cannot get the value of a token type 'String' as a number

Trying to get data from products.json file and store it in Products[] mention in file JsonFileProductServices.cs but getting this error
'The JSON value could not be converted to System.Int32. Path: $[0].id | LineNumber: 2 | BytePositionInLine: 33.'
JsonFileProductServices.cs is basically service to fetch data from product.json
Below mention are the files
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using System.Text.Json.Serialization;
using System.Text.Json;
namespace DevTest.Website.Models
{
public class Product
{
public int Id { get; set; }
public string Maker { get; set; }
[JsonPropertyName("img")]
public string Image { get; set; }
public string Url { get; set; }
public string Title { get; set; }
public string Description { get; set; }
public int[] Ratings { get; set; }
public override string ToString() => JsonSerializer.Serialize<Product>(this);
}
}
---product.cs---
[
{
"id" : "jenlooper-cactus",
"maker" : "#jenlooper",
"img" : "https://user-images.githubusercontent.com/41929050/61567048-13938600-aa33-11e9-9cfd-712191013192.jpeg",
"url" : "https://www.hackster.io/agent-hawking-1/the-quantified-cactus-an-easy-plant-soil-moisture-sensor-e65393",
"title" : "The Quantified Cactus: An Easy Plant Soil Moisture Sensor",
"description" : "This project is a good learning project to get comfortable with soldering and programming an Arduino."
},
{
"id" : "jenlooper-light",
"maker" : "jenlooper",
"img" : "https://user-images.githubusercontent.com/41929050/61567049-13938600-aa33-11e9-9c69-a4184bf8e524.jpeg",
"url" : "https://www.hackster.io/agent-hawking-1/book-light-dee7e4",
"title" : "A beautiful switch-on book light",
"description" : "Use craft items you have around the house, plus two LEDs and a LilyPad battery holder, to create a useful book light for reading in the dark."
},
{
"id" : "jenlooper-lightshow",
"maker" : "#jenlooper",
"img" : "https://user-images.githubusercontent.com/41929050/61567053-13938600-aa33-11e9-9780-104fe4019659.png",
"url" : "https://www.hackster.io/agent-hawking-1/bling-your-laptop-with-an-internet-connected-light-show-30e4db",
"title" : "Bling your Laptop with an Internet-Connected Light Show",
"description" : "Create a web-connected light-strip API controllable from your website, using the Particle.io."
},
{
"id" : "jenlooper-survival",
"maker" : "jenlooper",
"img" : "https://user-images.githubusercontent.com/41929050/61567051-13938600-aa33-11e9-8ae7-0b5c19aafab4.jpeg",
"url" : "https://www.hackster.io/agent-hawking-1/create-a-compact-survival-kit-38bfdb",
"title" : "Create a Compact Survival Kit with LED Track Lighting",
"description" : "Use an Altoids tin with Chibitronics sticker LEDs to create a light-up compact that doubles as a survival kit for the young hipster"
},
{
"id" : "sailorhg-bubblesortpic",
"maker" : "sailorhg",
"img" : "https://user-images.githubusercontent.com/41929050/61567054-13938600-aa33-11e9-9163-eec98e239b7a.png",
"url" : "https://twitter.com/sailorhg/status/1090107740049952770",
"title" : "Bubblesort Visualization",
"description" : "Visualization of sailor scouts sorted by bubblesort algorithm by their planet's distance from the sun"
},
{
"id" : "sailorhg-corsage",
"maker" : "sailorhg",
"img" : "https://user-images.githubusercontent.com/41929050/61567055-142c1c80-aa33-11e9-96ff-9fbac6413625.png",
"url" : "https://twitter.com/sailorhg/status/1090113666911891456",
"title" : "Light-up Corsage",
"description" : "Light-up corsage I made with my summer intern."
},
{
"id" : "sailorhg-kit",
"maker" : "sailorhg",
"img" : "https://user-images.githubusercontent.com/41929050/61567056-142c1c80-aa33-11e9-8682-10065d338145.png",
"url" : "https://twitter.com/sailorhg/status/1090122822007963648",
"title" : "Pastel hardware kit",
"description" : "Pastel hardware kits complete with custom manufactured pastel alligator clips."
},
{
"id" : "sailorhg-led",
"maker" : "sailorhg",
"img" : "https://user-images.githubusercontent.com/41929050/61567052-13938600-aa33-11e9-9a88-cd842073ba44.jpg",
"url" : "https://twitter.com/sailorhg/status/1090117277540745216",
"title" : "Heart-shaped LED",
"description" : "custom molded heart shaped LED with sprinkles."
},
{
"id" : "selinazawacki-soi-shirt",
"maker" : "selinazawacki",
"img" : "https://user-images.githubusercontent.com/41929050/61567060-142c1c80-aa33-11e9-8188-5a4803844a9e.png",
"url" : "https://www.instagram.com/p/BNvESj-j8PI/",
"title" : "Black Sweatshirt",
"description" : "Black sweatshirt hoody with the Sick of the Internet logo."
},
{
"id" : "selinazawacki-soi-pins",
"maker" : "selinazawacki",
"img" : "https://user-images.githubusercontent.com/41929050/61567059-142c1c80-aa33-11e9-939b-2ecf4492786d.png",
"url" : "https://www.instagram.com/p/BNm6hZzDoEF/",
"title" : "Sick of the Internet Pins",
"description" : "Still some time to enter the pin/sticker giveaway! "
},
{
"id" : "vogueandcode-hipster-dev-bro",
"maker" : "vogueandcode",
"img" : "https://user-images.githubusercontent.com/41929050/61567061-14c4b300-aa33-11e9-9fee-63ff2c0c9823.png",
"url" : "https://www.vogueandcode.com/shop/hipster-dev-bro",
"title" : "Hipster Dev",
"description" : "Hipster Dev is busy coding away while styled in a camo jacket and orange beanie."
},
{
"id" : "vogueandcode-pretty-girls-code-tee",
"maker" : "vogueandcode",
"img" : "https://user-images.githubusercontent.com/41929050/61567062-14c4b300-aa33-11e9-9dcd-8bfed4ece810.png",
"url" : "https://www.vogueandcode.com/shop/pretty-girls-code-tee",
"title" : "Pretty Girls Code Tee",
"description" : "Everyone’s favorite design is finally here on a tee! The Pretty Girls Code crew-neck tee is available in a soft pink with red writing."
},
{
"id" : "vogueandcode-ruby-sis-2",
"maker" : "vogueandcode",
"img" : "https://user-images.githubusercontent.com/41929050/61567063-14c4b300-aa33-11e9-8515-bcb866da9ea3.png",
"url" : "https://www.vogueandcode.com/shop/ruby-sis-2",
"title" : "Ruby Sis",
"description" : "Styled in a dashiki, Ruby Sis is listening to music while coding in her favorite language, Ruby!"
},
{
"id" : "selinazawacki-moon",
"maker" : "selinazawacki",
"img" : "https://user-images.githubusercontent.com/41929050/61567057-142c1c80-aa33-11e9-9781-9e442418eaab.png",
"url" : "https://www.instagram.com/p/BFktVYPinKQ/",
"title" : "Holographic Dark Moon Necklace",
"description" : "Not sure if I'll be making more, get it while I have it in the store."
},
{
"id" : "selinazawacki-shirt",
"maker" : "selinazawacki",
"img" : "https://user-images.githubusercontent.com/41929050/61567058-142c1c80-aa33-11e9-89fb-b4f30d84d69d.png",
"url" : "https://www.instagram.com/p/BEXlpiZCnJ3/",
"title" : "Floppy Crop",
"description" : "Used up the Diskette fabric today to make 2 of these crops."
}
]
----products.json
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using System.Text.Json.Serialization;
using System.Text.Json;
using Microsoft.AspNetCore.Hosting;
using DevTest.Website.Models;
namespace DevTest.Website.Services
{
public class JsonFileProductService
{
public JsonFileProductService(IWebHostEnvironment webHostEnvironment)
{
WebHostEnvironment = webHostEnvironment;
}
public IWebHostEnvironment WebHostEnvironment { get; }
private string JsonFileName => Path.Combine(WebHostEnvironment.WebRootPath, "data", "products.json");
public IEnumerable<Product> GetProducts()
{
using (var jsonFileReader = File.OpenText(JsonFileName))
{
return JsonSerializer.Deserialize<Product[]>(jsonFileReader.ReadToEnd(),
new JsonSerializerOptions
{
PropertyNameCaseInsensitive = true
});
}
}
}
}
--JsonFileProductService.cs---

How are you going to convert
"id" : "jenlooper-survival",
to this
public class Product
{
public int Id { get; set; }
.....
}
you have to fix the class
public class Product
{
public string Id { get; set; }
.....
}

Hard to tell without any source code but potential problems that can cause this:
Different model/dto when reading vs writing
Data can be serialized as some type T and you try cast it to string or data is as string but you trying to deserialize it to T.
I would compare your json data types to your C# model.
If you using JsonSerializer.Deserialize you can try to use JsonConvert.DeserializeObject from Newtonsoft.Json but I would first try to find difference between your model and json file.

How do I get the outgoing JSON from a CloudKit request?

I'm debugging the JSON for a C# app that POSTs to CloudKit using server keys.
According to the docs, the JSON I need to use to create/modify a record looks like this:
{
"operationType" : "create",
"record" : {
"recordType" : "Artist",
"fields" : {
"firstName" : {"value" : "Mei"},
"lastName" : {"value" : "Chen"}
}
"recordName" : "Mei Chen"
},
}
When I go to JSON2Csharp, I get the error below. I need to determine if the documentation is invalid, or if the server actually wants this JSON as-is.
Question
How can I obtain the JSON used in the apple CloudKit framework when it's sent to the CK server?

Your JSON doesn't appear to be formatted properly.
Please see if this fits your needs, as I believe it to be correctly formatted and structured to what you are working with:
{
"operationType" : "create",
"record" :
{
"recordType" : "Artist",
"fields" :
{
"firstName" : {"value" : "Mei"},
"lastName" : {"value" : "Chen"}
},
"recordName" : "Mei Chen"
}
}

Iterating over a JSON object (NOT an array) in C#

So, I have a json file in the following format
{
"-KeArK3V02mXYWx2OMWh" : {
"Description" : "this is a description",
"Location" : "Atlanta",
"Name" : "Event One",
"Time" : "2017-03-01T21:53:12.924645Z"
},
"-KeAtCNF_rmewZ_U3PpH" : {
"Description" : "another description",
"Location" : "Charlotte",
"Name" : "Event Two",
"Time" : "2017-03-01T22:01:25.603547Z"
},
"-KeAtd8CQW_EfH3Sw4YQ" : {
"Description" : "description goes here",
"Location" : "Toronto",
"Name" : "Event Three",
"Time" : "2017-03-01T22:03:19.3953859Z"
}
}
and I have a class called Event that is defined as follows
class Event {
public string Description { get; set; }
public string Location { get; set; }
public string Name { get; set; }
public DateTime Time { get; set; }
}
and I'd like to go through this and deserialize each of the child nodes into Event objects, basically deserializing the entire JSON into a List<Event>.
The issue is that the events aren't in an array, they're child nodes of another JSON object. So it turns out it's not as simple as
List<Event> elist = JsonConvert.DeserializeObject<List<Event>>(jsonResult);
I've seen similar questions asked where the items were organized in a JSON array, and I've tried the solutions listed there but they only work when it's an actual array, not the structure I have here. Google Firebase is what I'm working with here and unfortunately it doesn't support JSON arrays, so I have no way of containing the items in an array instead.
I'm not really used to JSON syntax so I might be missing something really obvious here, but I'm completely stumped.
Any help would be greatly appreciated.

Can you try this approach? It's pretty straight forward
var str = #"{
'-KeArK3V02mXYWx2OMWh' : {
'Description' : 'this is a description',
'Location' : 'Atlanta',
'Name' : 'Event One',
'Time' : '2017-03-01T21:53:12.924645Z'
},
'-KeAtCNF_rmewZ_U3PpH' : {
'Description' : 'another description',
'Location' : 'Charlotte',
'Name' : 'Event Two',
'Time' : '2017-03-01T22:01:25.603547Z'
},
'-KeAtd8CQW_EfH3Sw4YQ' : {
'Description' : 'description goes here',
'Location' : 'Toronto',
'Name' : 'Event Three',
'Time' : '2017-03-01T22:03:19.3953859Z'
}
}";
Dictionary<string, Event> elist = JsonConvert.DeserializeObject<Dictionary<string, Event>>(str);

C# MongoDB update object from oplog

What I have is a MongoDB which contains a collection of products. Lets say each product has the following structure:
public ObjectId Id { get; set; }
public string label { get; set; }
public List<IngredientsModel> ingredients { get; set; }
Now my C# program gets notified via the oplog if there was a change. This oplog looks like this:
{
"ts" : Timestamp(1425392023, 1),
"h" : NumberLong("-7452324865462273810"),
"v" : 2,
"op" : "u",
"ns" : "coll.products",
"o2" : { "_id" : ObjectId("54f5b87cd4c6959bd3ecf2d6") },
"o" : { "$set" : { "ingredients.1.ingredid" : "54f5c117d4c6959bd3ecf2e8" } }
}
When my application starts I create a list of products which I get from the MongoDB. I just use products.findAll() and the put them in a List<'products>
I have several clients connected to the MongoDB and every client gets notified via oplog.
Now I want to update my local lists without querying the MongoDB since I have all the information needed to update my local products already in the oplog.
My question is now: How to do that?
My approach is the following:
Deserialize the object to Json
var prodjson= Product[0].ToJson<ProductModel>();
Convert Json to BsonDocument
var prodbson= BsonSerializer.Deserialize<BsonDocument>(prodjson);
Apply the "o" key from the oplog to the prodbson
"o" : { "$set" : { "ingredients.1.ingredid" : "54f5c117d4c6959bd3ecf2e8" } }
NO IDEA

Mongo deepFind?

I Have a mongoDB that contains data in unknown structure, and I want to find all the documents that has a specific BsonElement. Can I do it without the knowledge about the documents structure?
For example, if the documents look like this (and I don't know that) can I find all the documents that has "DBType":"MSSQL"?
There is somting like collection.deepFind(QueryDocument);?
{
"_id" : ObjectId("528fe1602feaa3231c784d92"),
"CurrentJobs" : {
"_t" : "sqQueryJob",
"IsDone" : false,
"ExecuteTime" : ISODate("2013-11-22T22:57:35.733Z"),
"Result" : { },
"DB" : {
"DBType" : "MSSQL",
"Name" : "Data",
"Host" : ".",
"ServiceName" : "DataBase",
"Port" : "1521",
},
"QueryResult" : null,
"Query" : "."
}
}
Thanks!

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