C#如何将项目的json数组添加到ExpandooObject？

如何创建

prop3

并在

ExpandoObject

语法中包含开头（[）和结尾（]）大括号

prop3

是一个数组，那么如何将

userId

和

userName

添加到

ExpandoObject

{
    "prop1": "value1",
    "prop2": "value2",
    "prop3": [
        "userId",
        "userName"
    ],
}
    
// my ExpandoObject syntax
    
dynamic form = new ExpandoObject();
    
form.prop1 = "value1";
form.prop2 = "value2";
    
// what ExpandoObject syntax do I use to add the the json array now 
// including the [ ] and each single value to the array?

你可以用这个

form.prop3 = new[] { "userId", "userName" };

---

首先，需要使用

dynamic

array初始化属性，然后可以使用索引将值放入其中。见：

dynamic form = new ExpandoObject();
form.prop1 = "value1";
form.prop2 = "value2";
form.prop3 = new dynamic[2]; // initialized with 2 indexes
form.prop3[0] = "userId"; 
form.prop3[1] = "userName";

这是生成Json时得到的响应：

{
  "prop1": "value1",
  "prop2": "value2",
  "prop3": [
    "userId",
    "userName"
  ]
}