Strong class type for mapping root array in JSON response [duplicate]

Question

Client application I don't have much control over has an established pattern for making calls to a particular API. Drilling down into the existing methods I find it's using System.Net.Http.Json and calling response.Content.ReadFromJsonAsync<TResponse>(content), which I believe just takes a a target type TResponse and tries to convert the passed JSON string accordingly.

I've gotten this to work great in every scenario except one - where the response from the API is an unlabeled array:

[{value: "stuff1"}, {value: "stuff2"}, {value: "stuff3"}]

Every other JSON response object looks something like this:

{
    data: ["blah", "blah", "blah"]
    value: 15, 
    prop: "whatever"
}

And example working Type:

[JsonPropertyName("data")]
public IList<string> Data {get;set}

[JsonPropertyName("value")]
public int Value {get;set}

[JsonPropertyName("prop")]
public string Prop {get;set}

But my problem response doesn't have any named keys, it's just an array... so how do I create a Type for an array with no key?

Randy Hall · Accepted Answer · 2022-03-15 14:16:30Z

1

Two days of head scratching and I figure it out moments after posting a question:

Just pass in a list of type as the TResponse type:

 IList<MyCustomType>

answered Mar 15, 2022 at 14:16

Randy Hall

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