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C# 反序列化具有多个对象的 JSON 数组

[英]C# Deserialize JSON array with multiple objects

我正在接受一个我无法控制的 JSON 格式:

{
  "Transaction Information": [
    {
      "Type": "This is the Type"
    },
    {
      "Action": "No"
    },
    {
      "Owner": "Simpsons"
    },
    {
      "Buyer/Broker": "Y"
    },
    {
      "Compensation to Buyer": 3.0
    }
  ]
}

我想将它反序列化为一个类,例如:

public class Transaction
{
    [JsonProperty("Transaction Information")]
    public TransactionInformation[] TransactionInformation { get; set; }
}

public partial class TransactionInformation
{
    [JsonProperty("Type", NullValueHandling = NullValueHandling.Ignore)]
    public string Type { get; set; }

    [JsonProperty("Action", NullValueHandling = NullValueHandling.Ignore)]
    public string Action { get; set; }

    [JsonProperty("Owner", NullValueHandling = NullValueHandling.Ignore)]
    public string Owner { get; set; }

    [JsonProperty("Buyer/Broker", NullValueHandling = NullValueHandling.Ignore)]
    public string BuyerBroker { get; set; }

    [JsonProperty("Compensation to Buyer", NullValueHandling = NullValueHandling.Ignore)]
    public long? CompensationToBuyer { get; set; }
}

使用代码

var obj = JsonConvert.DeserializeObject<Transaction>(json);

但是,这给了我一个 Transaction.TransactionInformation 对象,其中包含 5 个记录,每个记录包含所有 5 个元素,每个记录都具有除 5 个元素之一之外的所有空值。

在此处输入图片说明

有没有一种简单的方法可以在一个记录中返回所有 5 个元素?

有没有一种简单的方法可以在一个记录中返回所有 5 个元素?

当然 - 只需将每个属性放在一个记录中:

var finalRecord = new TransactionInformation
{
    Type = obj.TransactionInformation.FirstOrDefault(x => !string.IsNullOrEmpty(x.Type))?.Type,
    Action = obj.TransactionInformation.FirstOrDefault(x => !string.IsNullOrEmpty(x.Action))?.Action,
    Owner = obj.TransactionInformation.FirstOrDefault(x => !string.IsNullOrEmpty(x.Owner))?.Owner,
    BuyerBroker = obj.TransactionInformation.FirstOrDefault(x => !string.IsNullOrEmpty(x.BuyerBroker))?.BuyerBroker,
    CompensationToBuyer = obj.TransactionInformation.FirstOrDefault(x => x.CompensationToBuyer.HasValue)?.CompensationToBuyer
};

您正在使用的 JSON 数据不是最方便的格式。 在一个完美的世界中,它看起来像这样:

{
    "Transaction Information": [{
            "Type": "This is the Type",
            "Action": "No",
            "Owner": "Simpsons",
            "Buyer/Broker": "Y",
            "Compensation to Buyer": 3.0
        }
    ]
}

那么你正在做的事情会很好地工作,你不必做这最后一步来规范化数据。

您可以创建一个自定义的 JsonConverter,使您能够连接到类型的反序列化:

public class TransactionConverter : JsonConverter<Transaction>
{
    public override void WriteJson(JsonWriter writer, Transaction value, JsonSerializer serializer)
    {
    
    }

    public override Transaction ReadJson(JsonReader reader, Type objectType, Transaction existingValue,
        bool hasExistingValue, JsonSerializer serializer)
    {
    
        var rootChildren = JToken.ReadFrom(reader).First.Children();
        var item = new TransactionInformation();
        foreach (var child in rootChildren.Children())
        {
            item.Type ??= (string)child["Type"];
            item.Action ??= (string) child["Action"];
            item.BuyerBroker ??= (string)child["Buyer/Broker"];
            item.Owner ??= (string)child["Owner"];
            item.CompensationToBuyer ??= (long?)child["Compensation to Buyer"];
        }

        return new Transaction {TransactionInformation = new[] {item}};
    }

    public override bool CanRead => true;

}

然后调用它:

var tx =  JsonConvert.DeserializeObject<Transaction>(str, new TransactionConverter());

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