如何读取 appSettings.json 中的字符串数组? [英] How to read a string array in appSettings.json?

问题描述

我的环境是 VS Code 和 .NET Core 2.0.

My env is VS Code and .NET Core 2.0.

我需要从我的 appsetting.json 中读取一个状态代码和几对代码/消息.

I need to read a status code and several pairs of code/message from my appsetting.json.

这是我的 appsettings.json 文件

This is my appsettings.json file

{
  "http": 
  {
    "statuscode": 200
  },
  "responses": 
  {
    "data": [
      {
        "code": 1,
        "message": "ok"
      },
      {
        "code": 2,
        "message": "erro"
      }
    ]
  }
}

我正在加载配置文件和数据，如下所示，但一切都为空:

I'm loading the configuration file and data like below, but everything is null:

private readonly IConfiguration _conf;
const string APPSET_SEC = "responses";
const string APPSET_KEY = "data";

public ValuesController(IConfiguration configuration)
{
    _conf = configuration;

    var section = _conf.GetSection($"{APPSET_SEC}:{APPSET_KEY}");
    var responses = section.Get<string[]>();

    var someArray = _conf.GetSection(APPSET_SEC).GetChildren().Select(x => x.Value).ToArray();
}

响应和 someArray 都为空.字符串数组似乎无效，但它看起来像一个有效的 Json 字符串数组.我需要修改我的 appsettings 或我的 C# 代码来获取数据"吗?数组加载到变量中?

Either responses and someArray are null. It appears that the string array is not valid but it looks like a valid Json string array. What do I need to modify my appsettings or my C# code to get "data" array loaded into the variable?

我在 json 文件中尝试了一个简化的数组

I tried a simplified array in json file

{
    "statuscode": 200,
    "data": [
      {
        "code": 1,
        "message": "ok"
      },
      {
        "code": 2,
        "message": "erro"
      }
    ]
 }

使用代码:

var section = _conf.GetSection($"{APPSET_SEC}");
var responses = section.Get<string[]>();

但我仍然没有快乐

推荐答案

当它是对象数组时，您试图将其作为字符串数组 string[] 获取，

You are trying to get it as a string array string[] when it is an object array,

创建一个POCO模型来匹配设置

Create a POCO model to match the setting

public class ResponseSeting {
    public int code { get; set; }
    public string message { get; set; }
}

并得到一个数组.

因此给出以下 appsetting.json

{
  "http": 
  {
    "statuscode": 200
  },
  "responses": 
  {
    "data": [
      {
        "code": 1,
        "message": "ok"
      },
      {
        "code": 2,
        "message": "erro"
      }
    ]
  }
}

响应数据将像

var responses = Configuration
    .GetSection("responses:data")
    .Get<ResponseSeting[]>();

这篇关于如何读取 appSettings.json 中的字符串数组?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！