我有一个可以有以下选择的对象:
"params": [23, 42]
"params": {"minuend": 42, "subtrahend": 23}
如何让json.net自动为第一个属性创建object[]
属性,为第二个属性创建Dictionary<string,object>
属性?
示例(存根)类:
[DataContract]
public class JsonRcpRequest
{
[DataMember(Name = "params")]
public object Parameters { get; set; }
}
答案 0 :(得分:3)
解决方案是使用以下方法创建自定义JsonConverter
:
public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
{
object source;
//[42, 23]
if (reader.TokenType == JsonToken.StartArray)
{
reader.Read();
var values = new List<object>();
while (reader.TokenType != JsonToken.EndArray)
{
values.Add(reader.Value);
reader.Read();
}
reader.Read();
source = values.ToArray();
}
else if (reader.TokenType == JsonToken.StartObject)//{"subtrahend": 23, "minuend": 42}
{
reader.Read();
var values = new Dictionary<string, object>();
while (reader.TokenType != JsonToken.EndObject)
{
if (reader.TokenType != JsonToken.PropertyName)
throw new FormatException("Expected a property name, got: " + reader.TokenType);
string propertyName = reader.Value.ToString();
reader.Read();
values.Add(propertyName, reader.Value);
reader.Read();
}
source = values;
}
else
throw new FormatException("Expected start of object or start of array");
reader.Read();
return source;
}
然后用它标记属性:
[DataMember(Name = "params", IsRequired = false)]
[JsonConverter(typeof(ArgumentConverter))]
public object[] Parameters { get; set; }