如何使用牛頓軟件從 class 的復雜類型屬性中僅序列化特定值

Question

我有一個 class 具有多個屬性，其中一些屬性是一種復雜類型，它本身具有多個其他屬性，我不想在所有這些不需要的屬性上使用JsonIgnore注釋，尋找僅獲取一個屬性以從某些屬性中序列化的方法復雜類型。

例如我有 3 節課

class Organization
{
    public Int32 ID {get; set;}
    public string Name {get; set;}
    public Geography Location {get; set;}
    public Employee AreaHead {get; set;}
}

class Geography 
{
    public Int32 GeoID {get; set;}
    public string Country {get; set;}
    public string City {get; set;}
    public string State {get; set;}
}   

class Employee 
{
    public Int32 EmpID {get; set;}
    public string Name {get; set;}
    public DateTime DOB {get; set;}
    public string Gender {get; set;}
}

here I want to serialize the Organization class object, that should include only 'Country' from Geography and 'EmpID' from Employee for respective Location and AreaHead properties, the json string output I am expecting as below using JsonConvert.SerializeObject method from NewtonSoft library.

{
   "ID":1,
   "Name":"Sales",
   "Location":"India",
   "AreaHead":5464
}

這可以使用 DefaultContractResolver 嗎？

合約解析器

public class DynamicContractResolver : DefaultContractResolver
{
    private readonly InfoProperty[] _jasonProperies;

    public DynamicContractResolver(params InfoProperty[] includePropertyForSerilization)
    {
        _jasonProperies = includePropertyForSerilization;
    }

    protected override JsonContract CreateContract(Type objectType)
    {
        if (typeof(TFDisplay).IsAssignableFrom(objectType))
        {
            var contract = this.CreateObjectContract(objectType);
            contract.Converter = null; // Also null out the converter to prevent infinite recursion.
            return contract;
        }
        return base.CreateContract(objectType);
    }


    protected override IList<JsonProperty> CreateProperties(Type type, MemberSerialization memberSerialization)
    {
        IList<JsonProperty> properties = base.CreateProperties(type, memberSerialization);

        if (_jasonProperies != null && _jasonProperies.Length > 0)
        {
            if (_jasonProperies.Any(o => (o.PropertyContainer ?? type) == type))
            {
                properties = properties.Where(p => _jasonProperies.Any(o => (o.PropertyContainer ?? type) == type && o.PropertyName == p.PropertyName)).ToList();
            }

        }

        return properties;
    }

    public class InfoProperty
    {
        public InfoProperty(string propertyName)
        {
            this.PropertyName = propertyName;
        }
        public InfoProperty() { }
        public InfoProperty(Type propertyContainer, string propertyName)
        {
            this.PropertyContainer = propertyContainer;
            this.PropertyName = propertyName;
        }
        public Type PropertyContainer { get; set; }
        public string PropertyName { get; set; }
    }

}

Answer 1

You can create an anonymous object with only required properties from the given Organization class and use JsonConvert.SerializeObject() function to get the desired JSON string

1. 從現有的組織實例創建一個匿名類型。

    var input = new { ID = organization.ID, Name = organization.Name, Location = organization.Location.Country, AreaHead = organization.AreaHead.EmpID }

2. 現在使用 NewtonSoft.Json 庫序列化這個 object ，

    using Newtonsoft.Json; ... var result = JsonConvert.SerializeObject(input, Formatting.Indented); Console.WriteLine(result);

---

使用JObject.FromObject()方法，

//Here input is an anonymous object variable declared in above section
var result = JObject.FromObject(input).ToString()
Console.WriteLine(result);

在線試用： .NET FIDDLE