在appsettings.json
{
"MyArray": [
"str1",
"str2",
"str3"
]
}
在Startup.cs
public void ConfigureServices(IServiceCollection services)
{
services.AddSingleton<IConfiguration>(Configuration);
}
在HomeController
public class HomeController : Controller
{
private readonly IConfiguration _config;
public HomeController(IConfiguration config)
{
this._config = config;
}
public IActionResult Index()
{
return Json(_config.GetSection("MyArray"));
}
}
上面是我的代码。结果是零。
如何获取数组?
这对我很管用;
创建json文件:
{
"keyGroups": [
{
"Name": "group1",
"keys": [
"user3",
"user4"
]
},
{
"Name": "feature2And3",
"keys": [
"user3",
"user4"
]
},
{
"Name": "feature5Group",
"keys": [
"user5"
]
}
]
}
然后,定义一些映射类:
public class KeyGroup
{
public string name { get; set; }
public List<String> keys { get; set; }
}
nuget packages:
Microsoft.Extentions.Configuration.Binder 3.1.3
Microsoft.Extentions.Configuration 3.1.3
Microsoft.Extentions.Configuration.json 3.1.3
然后加载它:
using Microsoft.Extensions.Configuration;
using System.Linq;
using System.Collections.Generic;
ConfigurationBuilder configurationBuilder = new ConfigurationBuilder();
configurationBuilder.AddJsonFile("keygroup.json", optional: true, reloadOnChange: true);
IConfigurationRoot config = configurationBuilder.Build();
var sectionKeyGroups =
config.GetSection("keyGroups");
List<KeyGroup> keyGroups =
sectionKeyGroups.Get<List<KeyGroup>>();
Dictionary<String, KeyGroup> dict =
keyGroups = keyGroups.ToDictionary(kg => kg.name, kg => kg);
对于从配置返回复杂JSON对象数组的情况,我调整了@djangojazz的答案,以使用匿名类型和动态而不是元组。
给定的设置部分:
"TestUsers": [
{
"UserName": "TestUser",
"Email": "Test@place.com",
"Password": "P@ssw0rd!"
},
{
"UserName": "TestUser2",
"Email": "Test2@place.com",
"Password": "P@ssw0rd!"
}],
你可以这样返回对象数组:
public dynamic GetTestUsers()
{
var testUsers = Configuration.GetSection("TestUsers")
.GetChildren()
.ToList()
.Select(x => new {
UserName = x.GetValue<string>("UserName"),
Email = x.GetValue<string>("Email"),
Password = x.GetValue<string>("Password")
});
return new { Data = testUsers };
}
从appsettings.json中获取所有section的所有值
public static string[] Sections = { "LogDirectory", "Application", "Email" };
Dictionary<string, string> sectionDictionary = new Dictionary<string, string>();
List<string> sectionNames = new List<string>(Sections);
sectionNames.ForEach(section =>
{
List<KeyValuePair<string, string>> sectionValues = configuration.GetSection(section)
.AsEnumerable()
.Where(p => p.Value != null)
.ToList();
foreach (var subSection in sectionValues)
{
sectionDictionary.Add(subSection.Key, subSection.Value);
}
});
return sectionDictionary;