Deserializing a serialized JSON file

Question

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.'

Answer 1

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

Answer 2

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