具有空json数组的C＃json对象

Question

I have a returned json object that contains an empty json array

{[]}

EDIT:

How do I check this in an if statement?

        string arrayData = string.Empty;

        if (response.Contains("\"data\":"))
        {
            JToken root = JObject.Parse(response);
            JToken data = root["data"];
            if (data != null)
            {
                arrayData = data.ToString();
            }
        }
        else
        {
            arrayData = response;
        }

        var responseDatas = JsonConvert.DeserializeObject<dynamic>(arrayData);

Here, responseDatas is now

{[]}

Answer 1

First, that is invalid JSON. The array should have a name, like this:

{ list: [] }

Second, you can deserialize the JSON using JSON.NET and then test the result:

public class ClassWithList
{
    public List<object> list { get; set; }
}

var o = JsonConvert.DeserializeObject<ClassWithList>(json);

if (o.list != null && o.list.Count > 0)
{ }

Answer 2

The json is invalid (in the original question and in the accepted answer). You should include double quotes ...

{
    "list": []
}