Why Does JSON Deserialization Fail When an Array is Expected as an Object?

Deserialization of JSON array into expected object failed: "Cannot deserialize array into object"

Attempting to deserialize a JSON array into an object of a specific class may result in the following error: "Cannot deserialize a JSON array (e.g. [1,2,3]) to type 'MyClass' because that type requires JSON Objects (such as {"name":"value"}) can be deserialized correctly."

This error indicates that the JSON data is in array format, while the target class expects a single object format. To resolve this issue, consider the following:

1. Deserialize JSON array into collection:

If you want to deserialize a JSON array into a collection of objects, you can modify the code as follows:

<code class="language-csharp">var objResponse1 = JsonConvert.DeserializeObject<List<RetrieveMultipleResponse>>(JsonStr);</code>

In this case, the JSON array will be deserialized into a list of RetrieveMultipleResponse objects.

2. Make sure the JSON is properly formatted as an object:

Alternatively, if you need to deserialize the JSON data into a single object, you can verify that the JSON is formatted correctly. JSON strings should be enclosed in curly braces ({}) and should contain key-value pairs. The following example JSON represents a valid object:

<code class="language-json">{
    "Attributes": [
        ...
    ],
    "Name": "account",
    "Id": "1"
}</code>

After formatting the JSON into an object, you can use the following code to deserialize it:

<code class="language-csharp">var objResponse1 = JsonConvert.DeserializeObject<RetrieveMultipleResponse>(JsonStr);</code>

Other options:

• You can also add a [JsonArray] attribute to the target class to force deserialization from a JSON array.
• If you have control over the JSON data, you can modify it into the desired object format before deserializing it.

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