[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。
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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