Deserializing Json getting error "Cannot deserialize the current JSON array"

Question

I am Deserializing Json with below code.

public class MyArray
        {
            public int RequestID { get; set; }
            public int Status { get; set; }
            public string ResponseMessage { get; set; }
        }
    
        public class Root
        {
            public List<MyArray> MyArray { get; set; }
        }
   var rawJson = "[{\"RequestID\":12345,\"Status\":100,\"ResponseMessage\": \"API Call Successful\"}]";

 var myDeserializedClass1 = JsonConvert.DeserializeObject<Root>(rawJson);

I am getting below error. It is not populating the the My Array. Any thoughts on what's going wrong here.

Cannot deserialize the current JSON array (e.g. [1,2,3]) into type 'xyz.Root' because the type requires a JSON object (e.g. {"name":"value"}) to deserialize correctly.

Raw json is simply one element... not an array. Deserialize to MyArray, not List of MyArray — Jawad
– Jawad, Commented Oct 29, 2020 at 14:04

Anu Viswan · Accepted Answer · 2020-10-29 14:21:20Z

1

Update Based on change in OP

As per your latest edit in the question, you have an array of MyArray. You should hence deserialize using a collection of MyArray.

For example,

 var myDeserializedClass1 = JsonConvert.DeserializeObject<MyArray[]>(rawJson); 
// OR
 var myDeserializedClass1 = JsonConvert.DeserializeObject<IEnumerable<MyArray>>(rawJson);

Based on Original Question before the Edit

You are attempting to deserialize using wrong object type (Root), which is why it fails to do so, and returns a null value.

Your Json contains a single instance of MyArray and not an instance of Root. You need to deserialize using

var myDeserializedClass1 = JsonConvert.DeserializeObject<MyArray>(rawJson);

That would provide you the desired result.

edited Oct 29, 2020 at 14:21

answered Oct 29, 2020 at 14:04

Anu Viswan

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Anup Over a year ago

Thanks for the answer, it is working this way. Please recheck the question, i have done some edits.

Eduard Keilholz · Accepted Answer · 2020-10-29 14:08:41Z

1

Your JSON simply doesn't contain an Array. A JSON array typically starts with a [ and ends with a ].

So either you change your JSON to this:

[
  {
    "RequestID": 12345,
    "Status": 100,
    "ResponseMessage": "API Call Successful"
  }
]

Or try and deserialize to the MyArray object immediately like so:

var deserializedObject = JsonConvert.DeserializeObject<MyArray>(json);

answered Oct 29, 2020 at 14:08

Eduard Keilholz

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Anup Over a year ago

[] This was there previously, i removed it. I have edited question now. please check.

Babak · Accepted Answer · 2020-10-29 14:32:31Z

1

If you wanted to make it deserializable to Root object, 'rawJson' should be something like this:

var rawJson = "{\"MyArray\":[{\"RequestID\":12345,\"Status\":100,\"ResponseMessage\": \"API Call Successful\"}]}";

By the way, if your Root class does not have any other data or behavior, you can simply desrialize a List of MyArray:

var rawJson = "[{\"RequestID\":12345,\"Status\":100,\"ResponseMessage\": \"API Call Successful\"}]";
 var myDeserializedObject = JsonConvert.DeserializeObject<List<MyArray>>(rawJson);

In the code above, myDeserializedObject is of type List. You can also deserialize this to any collection like MyArray[], IList<MyArray> or enumerable IEnumerable<MyArray>.

take a look at the live code in this dot net fiddle file I created.

edited Oct 29, 2020 at 14:32

answered Oct 29, 2020 at 14:18

Babak

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