在 API 响应中使用对象

问题描述

我正在构建一个响应 GET 请求的 API.一个字段是一个对象，它需要与查询返回的数据重复多次.

I'm building a API that responds to GET requests. One field is a object and it needs to be repeated with data for as many times as the query returns.

谁能给我举个例子说明如何在 c# 的响应中使用对象?还需要创建类吗?

Can anyone give me a example of how to use a object in a response with c#? Also the class need to be create?

提前致谢.

添加:

到目前为止，我的结构如下:

so far I have a structure like:

public class root
{
public int model { get; set; }
public string lang { get; set; }
public part[] parts { get; set; }
}

public class part
{
public int id { get; set; }
public string name { get; set; }
public type part_types { get; set; }
}

public class type
{
public string url { get; set; }
public string desc { get; set; }
}

返回的响应为

{ "model" : 4 , "lang" : "en_US", "parts" : [ { "id" : 1545, "name" : "Part 1", "part_types" : { "url" : "part.com/type1", "desc" : "有 6 位" } } ] }

{ "model" : 4 , "lang" : "en_US", "parts" : [ { "id" : 1545, "name" : "Part 1", "part_types" : { "url" : "part.com/type1", "desc" : "has 6 bits" } } ] }

但我需要它

{ "model" : 4 , "lang" : "en_US", "parts" : [ { "id" : 1545, "name" : "Part 1", "part_types" : { "type 1" : {"url" : "part.com/type1", "desc" : "有 6 位" }, "type 2" : { "url" : "part.com/type2", "desc" : "有 7 位."} } } ] }

{ "model" : 4 , "lang" : "en_US", "parts" : [ { "id" : 1545, "name" : "Part 1", "part_types" : { "type 1" : { "url" : "part.com/type1", "desc" : "has 6 bits" }, "type 2" : { "url" : "part.com/type2", "desc" : "has 7 bits." } } } ] }

part_type 字段是对象，我创建了一个名为 type 的类.但是我需要有一种或多种类型并指定类型的名称，例如类型 1"，然后在它的 url 和 desc 下还有 2 个字段.如您所见，上面有 2 种类型，类型 1 和类型 2.

The part_type field is the object and I made a class called type. But I need to have one or many type and specify the name of the type eg "type 1" then have 2 more fields under it url and desc. As you can see above has 2 type, type 1 and type 2.

谁能帮助我哪里出错了?

Can anyone help me where I am going wrong?

推荐答案

那么，如果我理解正确，您希望part_types"能够有多个部分?在您当前的代码中，一个 part_types 对象只能有一个.

So, if I understand correctly, you want "part_types" to be able to have many parts? In your current code, a part_types object can only have one.

你需要做两件事:1. 一种数据类型，即集合，以及2. 以您想要的方式写入该数据类型的序列化程序.因此，例如，您可以使用字典 (System.Collections.Generic.Dictionary).

You need two things:1. A data type that is a collection, and2. A serializer that writes that data type the way you want.So, for example, you can use a Dictionary (System.Collections.Generic.Dictionary).

public Dictionary<string,type> part_types { get; set; }

所以，假设你已经创建了对象 type1 和 type2，你会写:

So, assuming you have created objects type1 and type2, you would write:

mypart.part_types = new Dictionary<string,type>();
mypart.part_types.Add("type 1", type1);
mypart.part_types.Add("type 2", type2);

现在发生的事情取决于序列化程序.我通常使用 Json.NET，它运行良好且免费.我像你一样设置我的对象，但使用字典，我得到:

Now what happens depends on the serializer. I typically use Json.NET, which works well and is free. I set up my objects like yours but using the dictionary, and I get:

{
  "model": 4,
  "lang": "en_US",
  "parts": [
    {
      "id": 1545,
      "name": "Part 1",
      "part_types": {
        "type 1": {
          "url": "part.com/type1",
          "desc": "has 6 bits"
        },
        "type 2": {
          "url": "part.com/type1",
          "desc": "has 6 bits"
        }
      }
    }
  ]
}

我认为这就是您要寻找的...但是，使用 DataContractJsonSerializer (System.Runtime.Serialization.Json.DataContractJsonSerializer)，我明白了:

I think that's what you're looking for... HOWEVER, using the DataContractJsonSerializer (System.Runtime.Serialization.Json.DataContractJsonSerializer), I get this:

{
  "lang": "en_US",
  "model": 4,
  "parts": [
    {
      "id": 1545,
      "name": "Part 1",
      "part_types": [
        { "Key" : "type 1", "Value": {"desc":"has 6 bits","url":"part.com\/type1"} },
        { "Key" : "type 2", "Value": {"desc":"has 6 bits","url":"part.com\/type1"} }
      ]
    }
  ]
}

我不确定 DataContractJsonSerializer 如何处理其他集合(例如列表、KeyValuePairs 等)，因此如果您正在使用它，您可能需要进行试验.

I'm not sure how the DataContractJsonSerializer handles other collections (e.g. Lists, KeyValuePairs, etc.) so if you're using it, you may need to experiment.

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