在我的网络应用程序中,我使用的是Newtonsoft.Json,我有以下对象
[Newtonsoft.Json.JsonObject(Title = "MyCar")]
public class Car
{
[Newtonsoft.Json.JsonProperty(PropertyName = "name")]
public string Name{get;set;}
[Newtonsoft.Json.JsonProperty(PropertyName = "owner")]
public string Owner{get;set;}
}
我希望用根名称(类名)序列化它们。这是使用
所需的格式{'MyCar':
{
'name': 'Ford',
'owner': 'John Smith'
}
}
我知道我可以用匿名对象做到这一点,但是在Newtonsoft.Json库中有任何属性或其他方式吗?
答案 0 :(得分:32)
使用匿名类以您希望的方式塑造模型:
var root = new
{
car = new
{
name = "Ford",
owner = "Henry"
}
};
string json = JsonConvert.SerializeObject(root);
答案 1 :(得分:32)
我发现了一种简单的方法来渲染它...只需声明一个动态对象并将动态对象中的第一项指定为您的集合类...此示例假设您使用的是Newtonsoft.Json
private class YourModelClass
{
public string firstName { get; set; }
public string lastName { get; set; }
}
var collection = new List<YourModelClass>();
var collectionWrapper = new {
myRoot = collection
};
var output = JsonConvert.SerializeObject(collectionWrapper);
你最终应该得到的是:
{"myRoot":[{"firstName":"John", "lastName": "Citizen"}, {...}]}
答案 2 :(得分:9)
您可以轻松创建自己的序列化程序
var car = new Car() { Name = "Ford", Owner = "John Smith" };
string json = Serialize(car);
string Serialize<T>(T o)
{
var attr = o.GetType().GetCustomAttribute(typeof(JsonObjectAttribute)) as JsonObjectAttribute;
var jv = JValue.FromObject(o);
return new JObject(new JProperty(attr.Title, jv)).ToString();
}
答案 3 :(得分:4)
string Json = JsonConvert.SerializeObject(new Car { Name = "Ford", Owner = "John Smith" }, Formatting.None);
表示根元素使用GlobalConfiguration。
答案 4 :(得分:3)
对我来说,一个非常简单的方法就是创建2个类。
public class ClassB
{
public string id{ get; set; }
public string name{ get; set; }
public int status { get; set; }
public DateTime? updated_at { get; set; }
}
public class ClassAList
{
public IList<ClassB> root_name{ get; set; }
}
当你要进行序列化时:
var classAList = new ClassAList();
//...
//assign some value
//...
var jsonString = JsonConvert.SerializeObject(classAList)
最后,您将看到所需的结果如下:
{
"root_name": [
{
"id": "1001",
"name": "1000001",
"status": 1010,
"updated_at": "2016-09-28 16:10:48"
},
{
"id": "1002",
"name": "1000002",
"status": 1050,
"updated_at": "2016-09-28 16:55:55"
}
]
}
希望这有帮助!
答案 5 :(得分:2)
抱歉,我的英语不太好。但我喜欢改善赞成的答案。 我认为使用Dictionary更简单,更干净。
class Program
{
static void Main(string[] args)
{
agencia ag1 = new agencia()
{
name = "Iquique",
data = new object[] { new object[] {"Lucas", 20 }, new object[] {"Fernando", 15 } }
};
agencia ag2 = new agencia()
{
name = "Valparaiso",
data = new object[] { new object[] { "Rems", 20 }, new object[] { "Perex", 15 } }
};
agencia agn = new agencia()
{
name = "Santiago",
data = new object[] { new object[] { "Jhon", 20 }, new object[] { "Karma", 15 } }
};
Dictionary<string, agencia> dic = new Dictionary<string, agencia>
{
{ "Iquique", ag1 },
{ "Valparaiso", ag2 },
{ "Santiago", agn }
};
string da = Newtonsoft.Json.JsonConvert.SerializeObject(dic);
Console.WriteLine(da);
Console.ReadLine();
}
}
public class agencia
{
public string name { get; set; }
public object[] data { get; set; }
}
此代码生成以下json(这是所需的格式)
{
"Iquique":{
"name":"Iquique",
"data":[
[
"Lucas",
20
],
[
"Fernando",
15
]
]
},
"Valparaiso":{
"name":"Valparaiso",
"data":[
[
"Rems",
20
],
[
"Perex",
15
]
]
},
"Santiago":{
"name":"Santiago",
"data":[
[
"Jhon",
20
],
[
"Karma",
15
]
]
}
}
答案 6 :(得分:1)
好吧,你至少可以告诉Json.NET包含类型名称:http://www.newtonsoft.com/json/help/html/T_Newtonsoft_Json_TypeNameHandling.htm。 Newtonsoft.Json.JsonSerializer jser = new Newtonsoft.Json.JsonSerializer();
jser.TypeNameHandling = TypeNameHandling.Objects;
该类型将包含在对象的“$ type”属性的开头。
这并不是你想要的,但面对同样的问题对我来说已经足够了。
答案 7 :(得分:1)
我希望这有帮助。
//Sample of Data Contract:
[DataContract(Name="customer")]
internal class Customer {
[DataMember(Name="email")] internal string Email { get; set; }
[DataMember(Name="name")] internal string Name { get; set; }
}
//This is an extension method useful for your case:
public static string JsonSerialize<T>(this T o)
{
MemoryStream jsonStream = new MemoryStream();
var serializer = new System.Runtime.Serialization.Json.DataContractJsonSerializer(typeof(T));
serializer.WriteObject(jsonStream, o);
var jsonString = System.Text.Encoding.ASCII.GetString(jsonStream.ToArray());
var props = o.GetType().GetCustomAttributes(false);
var rootName = string.Empty;
foreach (var prop in props)
{
if (!(prop is DataContractAttribute)) continue;
rootName = ((DataContractAttribute)prop).Name;
break;
}
jsonStream.Close();
jsonStream.Dispose();
if (!string.IsNullOrEmpty(rootName)) jsonString = string.Format("{{ \"{0}\": {1} }}", rootName, jsonString);
return jsonString;
}
//Sample of usage
var customer = new customer {
Name="John",
Email="john@domain.com"
};
var serializedObject = customer.JsonSerialize();
答案 8 :(得分:1)
编写自定义JsonConverter是类似问题中提到的另一种方法。但是,由于JsonConverter
的设计性质,对于该问题使用该方法非常棘手,因为您需要谨慎使用WriteJson
实现,以免陷入无限递归:JSON.Net throws StackOverflowException when using [JsonConvert()]
一种可能的实现方式:
public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
{
//JToken t = JToken.FromObject(value); // do not use this! leads to stack overflow
JsonObjectContract contract = (JsonObjectContract)serializer.ContractResolver.ResolveContract(value.GetType());
writer.WriteStartObject();
writer.WritePropertyName(value.GetType().Name);
writer.WriteStartObject();
foreach (var property in contract.Properties)
{
// this removes any property with null value
var propertyValue = property.ValueProvider.GetValue(value);
if (propertyValue == null) continue;
writer.WritePropertyName(property.PropertyName);
serializer.Serialize(writer, propertyValue);
//writer.WriteValue(JsonConvert.SerializeObject(property.ValueProvider.GetValue(value))); // this adds escaped quotes
}
writer.WriteEndObject();
writer.WriteEndObject();
}
答案 9 :(得分:-5)
[Newtonsoft.Json.JsonObject(Title = "root")]
public class TestMain
这是您需要添加以使代码正常运行的唯一属性。