C# 序列化JSON时忽略空值

是否可以将对象序列化为JSON，但只能将那些属性与数据一起序列化

例如：

public class Employee
{
   [JsonProperty(PropertyName = "name")]
   public string Name { get; set; }

   [JsonProperty(PropertyName = "id")]
   public int EmployeeId { get; set; }

   [JsonProperty(PropertyName = "supervisor")]
   public string Supervisor { get; set; }
}

var employee = new Employee { Name = "John Doe", EmployeeId = 5, Supervisor = "Jane Smith" };

var boss = new Employee { Name = "Jane Smith", EmployeeId = 1 };

employee对象将序列化为：

 { "id":"5", "name":"John Doe", "supervisor":"Jane Smith" }

 { "id":"1", "name":"Jane Smith" }

boss对象将序列化为：

 { "id":"5", "name":"John Doe", "supervisor":"Jane Smith" }

 { "id":"1", "name":"Jane Smith" }

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谢谢

您可以在JSON属性上执行以下操作：

[JsonProperty("property_name", NullValueHandling = NullValueHandling.Ignore)]

或者，可以在序列化时忽略空值

string json = JsonConvert.SerializeObject(employee, Newtonsoft.Json.Formatting.Indented, new JsonSerializerSettings { NullValueHandling = NullValueHandling.Ignore });

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对于任何可能难以使用VB.NET的人，语法如下JsonConvert.SerializeObject（employee，Formatting.Indented，New JsonSerializerSettings with{.NullValueHandling=NullValueHandling.Ignore}）或用于对象修饰声明