This question already has answers here:
How to deserialize a JSON array into an object using Json.Net?
(2 answers)
How to deserialize an array of values with a fixed schema to a strongly typed data class?
(3 answers)
Closed 4 years ago.
Below is my JSON structure:
{
"status": "success",
"data": {
"MyValues": [
[
"2018-09-06T09:15:00+0530",
1030,
1038.75,
1017.2,
1030.9,
542542
],
[
"2018-09-07T09:15:00+0530",
1032.7,
1035.45,
1015.5,
1025.35,
410461
]
]
}
}
I am using Newtonsoft JSON. To make it strongly typed, I created below classes, considering JSON structure:
class MyValues
{
public DateTime TimeStamp { get; set; }
public decimal First { get; set; }
public decimal Second { get; set; }
public decimal Third { get; set; }
public decimal Fourth { get; set; }
public decimal Fifth { get; set; }
}
class Data
{
public MyValues[] MyValues { get; set; }
}
class MyData
{
public string Status { get; set; }
public Data Data { get; set; }
}
Finally, Below is the code I have written. It reads the above json object from jd.txt file and tries to parse it:
using (StreamReader file = File.OpenText(#"jd.txt"))
{
Newtonsoft.Json.JsonSerializer serializer = new Newtonsoft.Json.JsonSerializer();
MyData MyData = (MyData)serializer.Deserialize(file, typeof(MyData));
}
When I run above code, I see MyData.Data.MyValues null. I am unable to figure out the problem.
Kindly guide me to solve the problem
Your model should be:
public class Data
{
public List<List<object>> MyValues { get; set; }
}
public class MyData
{
public string status { get; set; }
public Data data { get; set; }
}
And then serialize and access to the datas:
using (StreamReader file = System.IO.File.OpenText(#"jd.txt"))
{
Newtonsoft.Json.JsonSerializer serializer = new Newtonsoft.Json.JsonSerializer();
MyData MyData = (MyData)serializer.Deserialize(file, typeof(MyData));
return MyData.data.MyValues[0][0].ToString();
}
1.)Create a Mydata object and load allvariables
2.)serialize it(if it is web service output you can observe json string your in browser)
3.)according to serialized format of json you can figure out what kind of json it accepts in return.
4.)after finding json it expects you can construct that kind of json,so that it can deserialize it.
5.)For example :
Mydata object json string(which we call serialized Mydata) is like this:
{
"status":"active",
"data":{
"MyValues":[
{
"Name":"k",
"ID":"122"
},
{
"Name":"a",
"ID":"123"
}
]
}
}
then your class expects this format of json string only to convert it back to Mydata object( which we call deserialization)
Related
This question already has answers here:
Deserialize JSON with C#
(10 answers)
Closed 1 year ago.
{
"status": "success",
"data": {
"custid1": 723,
"custid2": 670,
"custid3": 430
}
}
It doesn't have key-value pair it just contains the value of two columns. I have tried it by converting it into a data table but not getting the required result.
You can create a class like below. and then use NewtonSoft to deserialize it to the class object.
public class Data
{
public int custid1 { get; set; }
public int custid2 { get; set; }
public int custid3 { get; set; }
}
public class Example
{
public string status { get; set; }
public Data data { get; set; }
}
Code to deserialize:
string json = <yourjson>;
Example ex = JsonConvert.DeserializeObject<Example>(json);
You can see the nugget package details here.
You can deserialize it to ExpandoObject
ExpandoObject object1 = JsonConvert.DeserializeObject<ExpandoObject>(json);
I have a JSON file that has been serialized through an API, in which I need to deserialize it to use the data it generated in my code. The issue is that I'm getting an Exception Unhandled error in which I have tried to understand the solution to the error, but I have had a few days off tunnel vision with this issue.
I have tried my best to link my issue with other threads, but have been lost for a few days. I did get some form of sprint finish with setting up a {get { return } } with a property but due to the setup of the code when serializing I couldn't do that. Instead I've tried to put the file outputted in a simple location and tried desalinizing it based on the file location.
ImageModeration image1 = JsonConvert.DeserializeObject<ImageModeration>(File.ReadAllText(#"C:\ModerationOutput.json"));
// deserialize JSON directly from a file
using (StreamReader file = File.OpenText(#"C:\ModerationOutput.json"))
{
JsonSerializer serializer = new JsonSerializer();
ImageModeration image2 = (ImageModeration)serializer.Deserialize(file, typeof(ImageModeration));
}
Here is my json file
[
{
"ImageUrl": "URL",
"ImageModeration": {
"CacheID": "396a972f-79ae-4b31-a54c-0ba3314318fa_637026883058218816",
"Result": false,
"TrackingId": "UKS_ibiza_464a60be-f57d-4ee1-aa37-13d04f151fdd_ContentModerator.F0_4ae15371-36c9-4cb2-8e21-83381a29432c",
"AdultClassificationScore": 0.0048455675132572651,
"IsImageAdultClassified": false,
"RacyClassificationScore": 0.011258091777563095,
"IsImageRacyClassified": false,
"AdvancedInfo": [
{
"Key": "ImageDownloadTimeInMs",
"Value": "37"
},
{
"Key": "ImageSizeInBytes",
"Value": "34854"
}
],
"Status": {
"Code": 3000,
"Description": "OK",
"Exception": null
}
},
"TextDetection": null,
"FaceDetection": null
}
]
This error comes from the first line of code.
Newtonsoft.Json.JsonSerializationException: 'Cannot deserialize the
current JSON array (e.g. [1,2,3]) into type
'convertingJSON.Program+ImageModeration' because the type requires a
JSON object (e.g. {"name":"value"}) to deserialize correctly. To fix
this error either change the JSON to a JSON object (e.g.
{"name":"value"}) or change the deserialized type to an array or a
type that implements a collection interface (e.g. ICollection, IList)
like List that can be deserialized from a JSON array.
JsonArrayAttribute can also be added to the type to force it to
deserialize from a JSON array. Path '', line 1, position 1.'
Specific to your JSON string that you have posted, you can refer to the following code snippet to deserialize your string into its respective components.I am using the Newtonsoft JSON library which is a popular high-performance JSON framework for .NET. A working example can be found at: https://dotnetfiddle.net/RmXNHM
using System;
using Newtonsoft.Json;
using System.Collections.Generic;
public class Program
{
public static void Main()
{
string json=#"[{'ImageUrl':'URL','ImageModeration':{'CacheID':'396a972f-79ae-4b31-a54c-0ba3314318fa_637026883058218816','Result':false,'TrackingId':'UKS_ibiza_464a60be-f57d-4ee1-aa37-13d04f151fdd_ContentModerator.F0_4ae15371-36c9-4cb2-8e21-83381a29432c','AdultClassificationScore':0.004845567513257265,'IsImageAdultClassified':false,'RacyClassificationScore':0.011258091777563095,'IsImageRacyClassified':false,'AdvancedInfo':[{'Key':'ImageDownloadTimeInMs','Value':'37'},{'Key':'ImageSizeInBytes','Value':'34854'}],'Status':{'Code':3000,'Description':'OK','Exception':null}},'TextDetection':null,'FaceDetection':null}]";
var Sresponse = JsonConvert.DeserializeObject<List<RootObject>>(json);
foreach(var value1 in Sresponse)
{
Console.WriteLine(value1.ImageUrl);
Console.WriteLine(value1.ImageModeration.CacheID);
}
}
}
public class AdvancedInfo
{
public string Key { get; set; }
public string Value { get; set; }
}
public class Status
{
public int Code { get; set; }
public string Description { get; set; }
public object Exception { get; set; }
}
public class ImageModeration
{
public string CacheID { get; set; }
public bool Result { get; set; }
public string TrackingId { get; set; }
public double AdultClassificationScore { get; set; }
public bool IsImageAdultClassified { get; set; }
public double RacyClassificationScore { get; set; }
public bool IsImageRacyClassified { get; set; }
public List<AdvancedInfo> AdvancedInfo { get; set; }
public Status Status { get; set; }
}
public class RootObject
{
public string ImageUrl { get; set; }
public ImageModeration ImageModeration { get; set; }
public object TextDetection { get; set; }
public object FaceDetection { get; set; }
}
Output:
URL
396a972f-79ae-4b31-a54c-0ba3314318fa_637026883058218816
Use this site to convert you're JSON to a C# object and then deserialize to it.
According to the error it seems you may have been missing a property i.e. the object does not correspond to the JSON
SO I have a Json array as following:
{[data, [{"name":"Micheal Jackson","pic_large":"https://scontent.x.fbcdn.net/v/t1.0-1/p200x200/14909900_10154513795037597_3241587822245799922_n.jpg?oh=54ead7e0ba74b45b632d96da1515ccf8&oe=591C4938","id":"10154729171332597"}
How can I serialize it with C# to parse it into objects and then pass it to the view.
EDIT:
{[data, [{"name":"Sayed Zubair Hashimi","pic_large":"https://scontent.xx.fbcdn.net/v/t1.0-1/p200x200/14909900_10154513795037597_3241587822245799922_n.jpg?oh=54ead7e0ba74b45b632d96da1515ccf8&oe=591C4938","id":"10154729171332597"},{"name":"Junaid Walizada","pic_large":"https://scontent.xx.fbcdn.net/v/t1.0-1/p200x200/14055012_1760562554217155_4937121194048198140_n.jpg?oh=376b49c9d04c2676ebe3d853b122165e&oe=58EA033D","id":"1821833754756701"},{"name":"Mohib Akhondzada","pic_large":"https://scontent.xx.fbcdn.net/v/t1.0-1/s200x200/14264218_592094647641140_6351146344336469735_n.jpg?oh=a8a63893d71f76c45fa3d07389f1700a&oe=59147C84","id":"648198542030750"},{"name":"Za Beah","pic_large":"https://scontent.xx.fbcdn.net/v/t1.0-1/p200x200/15741112_359701871054520_6692094260041596196_n.jpg?oh=6d9a0e73f70145b821c79cbe738090a0&oe=58E5B5B5","id":"360411140983593"},{"name":"Baser Nader","pic_large":"https://scontent.xx.fbcdn.net/v/t1.0-1/p200x200/15094436_10153876544626432_1550234361821853528_n.jpg?oh=e197fa712b3180a20612ecdacb01747c&oe=58E54DEC","id":"10153975726331432"},{"name":"Abasin Deniz","pic_large":"https://scontent.xx.fbcdn.net/v/t1.0-1/p200x200/15698075_440749809647293_7905213567074684088_n.jpg?oh=aeb22664f458d75fc00638ca6fa4ecfc&oe=591F7BB3","id":"444098429312431"}]]}
EDIT2:
Here is how I retrieve above Json.
var appsecret_proof = access_token.GenerateAppSecretProof();
var fb = new FacebookClient(access_token);
dynamic myFeed = await fb.GetTaskAsync(
("me/feed?fields=likes{{name,pic_large}}")
.GraphAPICall(appsecret_proof));
The strings shown in your question are all invalid JSON. A properly formatted JSON might look like this:
{
"data": [{
"name": "Micheal Jackson",
"pic_large": "https://scontent.x.fbcdn.net/v/t1.0-1/p200x200/14909900_10154513795037597_3241587822245799922_n.jpg?oh=54ead7e0ba74b45b632d96da1515ccf8&oe=591C4938",
"id": "10154729171332597"
}]
}
Now if you want to map this to C# class that's pretty easy to do. Just define the models to reflect this structure:
public class Feed
{
[JsonProperty("id")]
public string Id { get; set; }
[JsonProperty("name")]
public string Name { get; set; }
[JsonProperty("pic_large")]
public string PicLarge { get; set; }
}
public class Result
{
[JsonProperty("data")]
public IList<Feed> Feeds { get; set; }
}
and then all that's left is to deserialize the JSON string using a JSON serializer such as Json.NET back to this object structure:
string json = ... the json string shown above
var result = JsonConvert.DeserializeObject<Result>(json);
foreach (var feed in result.Feeds)
{
Console.WriteLine(feed.Name);
}
first you need to create class with properties same as in json and then use the following code :
class obj
{
public string name {get ; set; }
public string pic_large {get ; set; }
public id {get ; set; }
}
using System.Web.Script.Serialization;
.
.
var obj = new JavaScriptSerializer().Deserialize<obj>(jsonString);
I am getting following JSON data
[{"id":"1","text":"System Admin","target":{"jQuery1710835279177001846":12},"checked":true,"state":"open"},
{"id":"2","text":"HRMS","target":{"jQuery1710835279177001846":34},"checked":false,"state":"open"},
{"id":"3","text":"SDBMS","target":{"jQuery1710835279177001846":42},"checked":false},
{"id":"8","text":"Admin","target":{"jQuery1710835279177001846":43},"checked":false},
{"id":"9","text":"My test Admin","target":{"jQuery1710835279177001846":44},"checked":false,"state":"open"},
{"id":"24","text":"ModuleName","target":{"jQuery1710835279177001846":46},"checked":false,"state":"open"}]
which try to parsed using Json.Net using strongly type
this are my property class
public class testclass
{
public string id { get; set; }
public string text { get; set; }
public string #checked { get; set; }
public string state { get; set; }
public target jQuery1710835279177001846 { get; set; }
}
public class testclass2
{
public List<testclass> testclass1 { get; set; }
}
public class target
{
public string jQuery1710835279177001846 { get; set; }
}
and here i am trying to access the data i am getting exception
Cannot deserialize the current JSON array (e.g. [1,2,3]) into type 'QuexstERP.Web.UI.Areas.SysAdmin.Controllers.testclass' because the type requires a JSON object (e.g. {"name":"value"}) to deserialize correctly.
My controller code look like
public void Test(string Name, object modeldata)
{
var obj = JsonConvert.DeserializeObject<testclass>(Name);
}
Any idea how to solve this issue in C#
Your Json string looks to have serialized array object in it because it contains [ ]. It means you have a Json string which is formed after serialization of array object. So you need to deserialized into array object, so try this
var obj = JsonConvert.DeserializeObject<List<testclass>>(jsonString);
you have Array of TestClass. so it should be like this.
var model= JsonConvert.DeserializeObject<List<testclass>>(Name);
why you are using JSonConvert ? in MVC3 you can do like this
return Json(yourmodel,JsonRequestBehavior.AllowGet);
Your json objects are like this
{
"id":"1",
"text":"System Admin",
"target":{
"jQuery1710835279177001846":12
},
"checked":true,
"state":"open"
}
It should be like this I guess
{
"id":"1",
"text":"System Admin",
"jQuery1710835279177001846":12,
"checked":true,
"state":"open"
}
i have the following json string (jsonString)
[
{
"name":"Fruits",
"references":[
{"stream":{"type":"reference","size":"original",id":"1"}},
],
"arts":[
{"stream":{"type":"art","size":"original","id":"4"}},
{"stream":{"type":"art","size":"medium","id":"9"}},
]
}
]
and the following C# objects
class Item
{
public string Name { get; set; }
public List<Stream> References { get; set; }
public List<Stream> Arts { get; set; }
public Item()
{
}
}
class Stream
{
public string Type { get; set; }
public string Size { get; set; }
public string Id { get; set; }
public Stream()
{
}
}
and the following code
Item item = JsonConvert.DeserializeObject<Item>(jsonString);
when I run the code, it creteas the correct number of references and arts, but each stream has null value (type = null, size = null).
is it posible to do this json.net deserializeobject method or should I manually deserialize ?
EDIT: Okay, ignore the previous answer. The problem is that your arrays (references and arts) contain objects which in turn contain the relevant data. Basically you've got one layer of wrapping too many. For example, this JSON works fine:
[
{
"name":"Fruits",
"references":[
{"Type":"reference","Size":"original","Id":"1"},
],
"arts":[
{"Type":"art","Size":"original","id":"4"},
{"type":"art","size":"medium","id":"9"},
]
}
]
If you can't change the JSON, you may need to introduce a new wrapper type into your object model:
public class StreamWrapper
{
public Stream Stream { get; set; }
}
Then make your Item class have List<StreamWrapper> variables instead of List<Stream>. Does that help?