将属性添加到 json 数组的所有对象

Question

>我有这个员工 DTO

Class Employee
{
   int Id {get; set;}
   string Name {get; set;}
}

在我的代码中，我正在收集 Employee 对象并对其进行序列化，如下所示

string JsonString = JsonConvert.SerializeObject(employees); // where employees is IEnumerable<Employee>

我在这里得到的 JsonString 是

[{"Id":1,"Name":"John"},
{"Id":2,"Name":"Mark"},
{"Id":3,"Name":"Pete"}]

现在我想向 json 数组中存在的所有这些对象再添加一个属性

[{"Id":1,"Name":"John","Department":"Computer Science"},
{"Id":2,"Name":"Mark","Department":"Computer Science"},
{"Id":3,"Name":"Pete","Department":"Computer Science"}]

挑战在于我不想向现有的员工 Dto 添加额外的属性"部门"。

请帮忙。

Answer 1

您可以从员工创建中间匿名类型并序列化该类型：

var extendedEmployees = employees.Select(employee => new
                        {
                            employee.Id,
                            employee.Name, 
                            Department = "Computer Science",
                        }
var json = JsonConvert.Serialize(extendedEmployees)