Newtonsoft.Json 序列化和反序列化以及时间格式 2

一、JSON使用JsonPropertyAttribute重命名属性名

1.先创建一个Movie对象，然后在其属性上添加JsonProperty，并指定重命名的名称。注意：属性Name和Director已指定。

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using GongHuiNewtonsoft.Json;
namespace JSONDemo
{
public class Movie
{
[JsonProperty("name")]
public string Name { get; set; }
[JsonProperty("Chinese Director")]
public string Director { get; set; }
public int ReleaseYear { get; set; }
}
}

2.实例化Movie对象，然后序列化。

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using GongHuiNewtonsoft.Json;
using GongHuiNewtonsoft.Json.Serialization;
using GongHuiNewtonsoft.Json.Converters;
namespace JSONDemo
{
class Program
{
static void Main(string[] args)
{
Movie m = new Movie
{
Name = "非诚勿扰1",
Director = "冯小刚",
ReleaseYear = 2008
};
string json = JsonConvert.SerializeObject(m, Formatting.Indented);
Console.WriteLine(json);
}
}
}

3.运行结果，注意：属性ReleaseYear未被重命名。

二、JSON使用JsonPropertyAttribute序列化升序排序属性

1.先创建一个Movie对象，然后指定JsonProperty，并添加Order属性。

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using GongHuiNewtonsoft.Json;
namespace JSONDemo
{
public class Movie
{
[JsonProperty(Order=4)]
public string Name { get; set; }
[JsonProperty(Order=0)]
public string Director { get; set; }
public int ReleaseYear { get; set; }
[JsonProperty(Order=-3)]
public string ChiefActor { get; set; }
[JsonProperty(Order=2)]
public string ChiefActress { get; set; }
}
}

2.实例化Movie对象，然后序列化。

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using GongHuiNewtonsoft.Json;
using GongHuiNewtonsoft.Json.Serialization;
using GongHuiNewtonsoft.Json.Converters;
namespace JSONDemo
{
class Program
{
static void Main(string[] args)
{
Movie m = new Movie
{
Name = "非诚勿扰1",
Director = "冯小刚",
ReleaseYear = 2008,
ChiefActor="葛优",
ChiefActress="舒淇"
};
string json = JsonConvert.SerializeObject(m, Formatting.Indented);
Console.WriteLine(json);
}
}
}

3.运行结果。注意：未指定Order序号的属性，界定于大于负数小于正数，并按默认顺序排序。

三、JSON使用JsonPropertyAttribute反序列化属性时，Required指定属性性质

1.创建一个Movie对象，给属性添加JsonProperty，并指定其Required的性质。属性Name必须有值，DateTime可以为空.

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using GongHuiNewtonsoft.Json;
namespace JSONDemo
{
public class Movie
{
[JsonProperty(Required=Required.Always)]
public string Name { get; set; }
[JsonProperty(Required = Required.AllowNull)]
public DateTime? ReleaseDate { get; set; }
public string Director { get; set; }
}
}

2.实例化Movie对象，反序列化JSON。

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using GongHuiNewtonsoft.Json;
using GongHuiNewtonsoft.Json.Serialization;
using GongHuiNewtonsoft.Json.Converters;
namespace JSONDemo
{
class Program
{
static void Main(string[] args)
{
string json = @"{
'Name':'举起手来1',
'Director':'冯小宁',
'ReleaseDate':null
}";
Movie m = JsonConvert.DeserializeObject<Movie>(json);
Console.WriteLine(m.Name);
Console.WriteLine(m.Director);
Console.WriteLine(m.ReleaseDate);
}
}
}

3.运行结果是

四、JSON使用JsonPropertyAttribute序列化引用类型集合

1.创建一个Director对象，并声明一个本身类型的属性，指定JsonProperty中的IsReference为true.

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using GongHuiNewtonsoft.Json;
namespace JSONDemo
{
public class Director
{
public string Name { get; set; }
[JsonProperty(IsReference=true)]
public Director ExecuteDir { get; set; }
}
}

2.创建一个Movie对象，声明一个Director集合的属性，指定JsonProperty中的IsReference为true.

[csharp] view plain copy

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using GongHuiNewtonsoft.Json;
namespace JSONDemo
{
public class Movie
{
public string Name { get; set; }
[JsonProperty(ItemIsReference=true)]
public IList<Director> Directors { get; set; }
}
}

3.序列化对象

[csharp] view plain copy

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using GongHuiNewtonsoft.Json;
using GongHuiNewtonsoft.Json.Serialization;
using GongHuiNewtonsoft.Json.Converters;
namespace JSONDemo
{
class Program
{
static void Main(string[] args)
{
Director dir = new Director
{
Name = "冯小刚"
};
Director dir1 = new Director
{
Name = "张艺谋",
ExecuteDir = dir
};
Movie m = new Movie
{
Name = "满城尽带黄金甲",
Directors = new List<Director>
{
dir,
dir1
}
};
string json = JsonConvert.SerializeObject(m, Formatting.Indented);
Console.WriteLine(json);
}
}
}

4.运行结果

五、JSON使用JsonPropertyAttribute序列化忽略属性null

1.创建一个Movie对象，并在属性上指定JsonProperty，添加NullValueHandling，忽略null

[csharp] view plain copy

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using GongHuiNewtonsoft.Json;
namespace JSONDemo
{
public class Movie
{
public string Name { get; set; }
public string Director { get; set; }
[JsonProperty(NullValueHandling=NullValueHandling.Ignore)]
public DateTime? LaunchDate { get; set; }
}
}

2.实例化对象Movie对象，然后序列化

[csharp] view plain copy

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using GongHuiNewtonsoft.Json;
using GongHuiNewtonsoft.Json.Serialization;
using GongHuiNewtonsoft.Json.Converters;
namespace JSONDemo
{
class Program
{
static void Main(string[] args)
{
Movie m = new Movie
{
Name = "爱情呼叫转移",
Director = "张建亚"
};
string json = JsonConvert.SerializeObject(m, Formatting.Indented);
Console.WriteLine(json);
}
}
}

3.运行的结果

JSON源代码下载地址：http://download.csdn.net/detail/lovegonghui/9342751

原文链接：http://blog.csdn.net/lovegonghui/article/details/50272743

转载于:https://www.cnblogs.com/1175429393wljblog/p/8066061.html