I have student class with array StudentPhones. When i remove StudentPhones property from Student class is working perfectly when post with Postman. But when add StudentPhones property then Postman gives me this error:
{
"StudentPhones": [
"Cannot deserialize the current JSON array (e.g. [1,2,3]) into type 'DataAccess.StudentPhone' because the type requires a JSON object (e.g. {\"name\":\"value\"}) to deserialize correctly.\r\nTo 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.\r\nPath 'StudentPhones', line 4, position 23."
]
}
public class Student
{
public string StudentName { get; set; }
public string StudentSurname { get; set; }
public StudentPhone StudentPhones { get; set; }
}
public class StudentPhone
{
public int PhoneType{ get; set; }
public string PhoneNumber { get; set; }
}
public async Task<ServiceResult> SaveStudent([FromBody]Student student)
{
}
How can I post this json? (I am using angular 6 in real, postman is only for example.)
my json
{
"studentName": "test",
"studentSurname": "test",
"studentPhones": [
{
"phoneType": 1,
"phoneNumber ": "111111111"
},
{
"phoneType": 2,
"phoneNumber ": "2222222222"
}
],
}
You have an array of phones in your JSON, so instead of public StudentPhone StudentPhones { get; set; } in your model, you should have public List<StudentPhone> StudentPhones { get; set; }
Related
I'm trying without success to deserialize this JSON in c#:
{
"settings": {
"path": "http:\/\/www.igormasin.it\/fileuploads\/tanja_23a6id"
},
"files": [{
"file": "\/IMG_0992-Edit_a.jpg"
}, {
"file": "\/IMG_1024-Edit_a.jpg"
}, {
"file": "\/IMG_1074-Edit_a.jpg"
}, {
"file": "\/Untitled-1.jpg"
}]
}
my code:
public class JsonTxt
{
public IList<string> settings { get; set; }
public IList<string> files { get; set; }
}
downloadstring contains the Json text:
var deserialized = JsonConvert.DeserializeObject<JsonTxt>(downloadString);
Console.WriteLine("*************************************************");
Console.WriteLine(deserialized.settings[0].ToString());
Console.WriteLine(deserialized.files.Count);
exception:
Newtonsoft.Json.JsonSerializationException: 'Cannot deserialize the current JSON object (e.g.
{"name":"value"}) into type 'System.Collections.Generic.IList`1[System.String]' because the type
requires a JSON array (e.g. [1,2,3]) to deserialize correctly.
To fix this error either change the JSON to a JSON array (e.g. [1,2,3]) or change the deserialized
type so that it is a normal .NET type (e.g. not a primitive type like integer, not a collection type
like an array or List<T>) that can be deserialized from a JSON object. JsonObjectAttribute can also
be added to the type to force it to deserialize from a JSON object.
Path 'settings.path', line 1, position 20.'
I am not able to understand the error, and what I am suposed to do.. From what I understand IList is wrong, but what else would be the correct thing to write?
Your class structure needs to be something like this:
public class JsonTxt
{
public Settings Settings { get; set; }
public IList<File> Files { get; set; }
}
public class Settings
{
public string Path { get; set; }
}
public class File
{
public string File { get; set; }
}
Settings is an object, not a collection, and Files is a collection of objects not strings.
Your class type expect IList settings :
public class JsonTxt
{
public IList<string> settings { get; set; }
public IList<string> files { get; set; }
}
but in the json you provide is an object
"settings": {
"path": "http:\/\/www.igormasin.it\/fileuploads\/tanja_23a6id"
},
you should change JsonText attributes type to match with your 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
How I should deserialize below JSON?
{
"lastUpdateId": 131537317,
"bids": [
["0.08400000", "0.54300000", []],
["0.08399800", "0.70800000", []],
["0.08399400", "1.22700000", []],
["0.08399300", "0.61700000", []],
["0.08399100", "0.35400000", []]
],
"asks": [
["0.08408300", "0.09100000", []],
["0.08408400", "5.55300000", []],
["0.08408600", "0.71800000", []],
["0.08408900", "0.14500000", []],
["0.08409000", "0.15100000", []]
]
}
I use classes like below. Ask and Bid are the same.
Order deserializedProduct = JsonConvert.DeserializeObject<Order>(timeServer);
public class Order
{
public int lastUpdateId { get; set; }
public List<Bid> bids { get; set; }
public List<Ask> asks { get; set; }
}
public class Bid
{
public List<string> Items { get; set; }
}
I have error:
Cannot deserialize the current JSON array (e.g. [1,2,3]) into type
'WebApplication2.Models.Bid' 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
'bids[0]', line 1, position 35.
Better class to represent your JSON is:
public class Order
{
public int lastUpdateId { get; set; }
public List<List<object>> bids { get; set; }
public List<List<object>> asks { get; set; }
}
As #maccettura mentioned in his comment Bids and Asks are IEnumerable<IEnumerable<string>>
I am new to Newtonsoft.Json so please excuse my ignorance - however I am coming up against this issue when trying to Deserialize the following Json to either a c# object or indeed manually.
The Json is
{
"travellerInfo": [
{
"passengerData": {
"travellerInformation": {
"passenger": [
{
"type": "ADT",
"firstName": "MARY MRS"
},
{
"type": "INF",
"firstName": "JOSHUA"
}
],
"traveller": {
"surname": "SMITH",
"quantity": "2"
}
}
}
},
{
"passengerData": {
"travellerInformation": {
"passenger": {
"type": "ADT",
"firstName": "JOHN MR"
},
"traveller": {
"surname": "SMITH",
"quantity": "1"
}
}
}
}
]
}
So as you can see, on the first 'passenger' item, this returns as an Array, however on the second 'passenger' item, it doesn't return as an array, just a single block. I am not in control of the Json being sent to me - it comes from an external system. My C# classes are
public class Passenger
{
public string type { get; set; }
public string firstName { get; set; }
}
public class Traveller
{
public string surname { get; set; }
public string quantity { get; set; }
}
public class TravellerInformation
{
public List<Passenger> passenger { get; set; }
public Traveller traveller { get; set; }
}
public class PassengerData
{
public TravellerInformation travellerInformation { get; set; }
}
public class TravellerInfo
{
public PassengerData passengerData { get; set; }
}
and I call
var example = JsonConvert.DeserializeObject<TravellerInfo>(jsonString);
I am getting the error
Cannot deserialize the current JSON array (e.g. [1,2,3]) into type 'Script1.TravellerInfo' 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<T> 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 'travellerInfo', line 57, position 20.
I tried putting a [JsonArray] attribute on the Passenger class to force it to deserialise as an array/list, but same error occured as I think the underlying item is a JProperty instead of a JObject.
So how can I get this to work when the ["passenger"] can come back as both an Array and Single object ?
Cheers in Advance
You can try deserialize it as dynamic and then do some checks to types. Check if it is IEnumerable.
That should do the job.
Try this. Replace List<Passenger> with object passenger in TravellerInformation:
public class Traveller
{
public string surname { get; set; }
public string quantity { get; set; }
}
public class TravellerInformation
{
public object passenger { get; set; }
public Traveller traveller { get; set; }
}
public class PassengerData
{
public TravellerInformation travellerInformation { get; set; }
}
public class TravellerInfo
{
public PassengerData passengerData { get; set; }
}
And call this by passing List<TravellerInfo> instead of TravellerInfo:
var example = JsonConvert.DeserializeObject<List<TravellerInfo>>(jsonString);
Also for these cases you can use this service which automatically creates C# classes from JSON objects, so you don't have to worry about correctness.
this is the json file:
{
"Message": {
"Code": 200,
"Message": "request success"
},
"Data": {
"USD": {
"Jual": "13780",
"Beli": "13760"
}
},
"LastUpdate": "2015-11-27 22:00:11",
"ProcessingTime": 0.0794281959534
}
I have a problem when I am converting to class like this:
public class Message
{
public int Code { get; set; }
public string Message { get; set; }
}
public class USD
{
public string Jual { get; set; }
public string Beli { get; set; }
}
public class Data
{
public USD USD { get; set; }
}
public class RootObject
{
public Message Message { get; set; }
public Data Data { get; set; }
public string LastUpdate { get; set; }
public double ProcessingTime { get; set; }
}
and when I deserialized with this code :
private void button1_Click(object sender, EventArgs e)
{
WebClient wc = new WebClient();
var json = wc.DownloadString(textBox1.Text);
List<User> users = JsonConvert.DeserializeObject<List<User>>(json);
dataGridView1.DataSource = json;
}
When I run the code I get an unhandled exception which says:
Cannot deserialize the current JSON object (e.g. {"name":"value"}) into type 'System.Collections.Generic.List`1[WindowsFormApp.EmployeeInfo+Areas]' because the type requires a JSON array (e.g. [1,2,3]) to deserialize correctly.
To fix this error either change the JSON to a JSON array (e.g. [1,2,3]) or change the deserialized type so that it is a normal .NET type (e.g. not a primitive type like integer, not a collection type like an array or List<T>) that can be deserialized from a JSON object. JsonObjectAttribute can also be added to the type to force it to deserialize from a JSON object.”
Can anyone tell me what I am doing wrong and how to get the last item deserialized correctly?
JSON.Net is expecting (when you pass a collection type to the DeserializeObject method), that the root object is an array. According to your data, it's an object and needs to be processed as a singular user.
And then you need to pass that to the dataSource, so you'd then wrap the deserialized User into var userList = new List<User>{user};
The error message is pretty straightforward. You are trying to deserialize something that isn't an array (your JSON string) into a collection (List<User>). It's not a collection so you can't do that. You should be doing something like JsonConvert.DeserializeObject<RootObject>(json) to get a single object.