c# - 将 Json 数组解析为 C# 类

Question

这是我的代码:

Encoding enc = System.Text.Encoding.GetEncoding(1252);
StreamReader loResponseStream = new StreamReader(resp.GetResponseStream(), enc);
JsonSerializer serializer = new JsonSerializer();
JsonTextReader jsreader = new JsonTextReader(loResponseStream);
results = (mHealthData)serializer.Deserialize(jsreader, typeof(mHealthData)); ***
loResponseStream.Close();

public class mHealthData
{ // Class for the Mhealth Data
    public class RootObject
    {
        public string source { get; set; }
        public string name { get; set; }
        public string type { get; set; }
        public string unit { get; set; }
        public double value { get; set; }
        public string timestamp { get; set; }
    }
}   

这是我在标有 ** 的行上收到的错误:

Cannot deserialize the current JSON array (e.g. [1,2,3]) into type 'MHealthPlugin.mHealthData' 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<T> 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.

我不知道如何解决这个问题。我试过输入 List<mHealthData>代码中几乎无处不在，但无济于事。其他其余的电话我都可以正常工作。作为引用，下面是我尝试解析的 JSON 的示例:

[{"source":"hi","name":"G","type":"number","unit":null,"value":126,"timestamp":"1974-07-27T09:35:12Z"},{"source":"hi","name":"G","type":"number","unit":null,"value":120,"timestamp":"1974-07-27T09:35:12Z"}]

Answer 1

您的 mHealthData 类中没有任何内容，除了一个嵌套类。退后一步，看看您的数据应该如何定义。

看起来您需要一个 RootObject 类。在这种情况下，类应该是:

public class RootObject
{
    public string source { get; set; }
    public string name { get; set; }
    public string type { get; set; }
    public string unit { get; set; }
    public double value { get; set; }
    public string timestamp { get; set; }
}

然后当您反序列化时，您最终会得到一个 RootObject[] 类型的对象 - 您的 JSON 只是一个数组，而不是包含数组的对象。