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?
在IOptions不起作用后，我发现这更简单，序列化时要做的事情也少得多。
//appsettings.json
"DatabaseModelCreationOptions": {
"Users": [
{
"Id": "1",
"UserName": "adminuser",
"Email": "youremail@myemail.com",
"Password": "!Ch4",
"Player": "Admin",
"PlayerInitials": "ADMIN",
"ApiKey": "40753ey"
}
],
"UserRoles": [
{
"Id": "af9986df",
"Name": "Admin",
"ConcurrencyStamp": "ddd53170"
},
{
"Id": "03b82b0e",
"Name": "Manager",
"ConcurrencyStamp": "65da3f89"
}
]
}
我需要的类，我不需要给你们看嵌套的类属性，你们可以在上面看到。
public class DatabaseModelCreationOptions
{
public IEnumerable<User>? Users { get; set; }
public IEnumerable<UserRole>? UserRoles { get; set; }
}
然后调用GetSection("")。得到
var dbOptions = configuration.GetSection("DatabaseModelCreationOptions")
.Get<DatabaseModelCreationOptions>();
最近我还需要从appsettings中读取一个简单的字符串数组。Json文件(以及其他类似的. Json配置文件)。
对于我的方法，我创建了一个简单的扩展方法:
public static class IConfigurationRootExtensions
{
public static string[] GetArray(this IConfigurationRoot configuration, string key)
{
var collection = new List<string>();
var children = configuration.GetSection(key)?.GetChildren();
if (children != null)
{
foreach (var child in children) collection.Add(child.Value);
}
return collection.ToArray();
}
}
原始海报的.json文件如下所示:
{
"MyArray": [
"str1",
"str2",
"str3"
]
}
使用上面的扩展方法，它使读取这个数组成为一个非常简单的一行事务，如下面的例子所示:
var configuration = new ConfigurationBuilder().AddJsonFile("appsettings.json").Build();
string[] values = configuration.GetArray("MyArray");
在运行时，在值上设置一个'QuickWatch'的断点，以验证我们已经成功地将.json配置文件中的值读入一个字符串数组:
在IOptions不起作用后，我发现这更简单，序列化时要做的事情也少得多。
//appsettings.json
"DatabaseModelCreationOptions": {
"Users": [
{
"Id": "1",
"UserName": "adminuser",
"Email": "youremail@myemail.com",
"Password": "!Ch4",
"Player": "Admin",
"PlayerInitials": "ADMIN",
"ApiKey": "40753ey"
}
],
"UserRoles": [
{
"Id": "af9986df",
"Name": "Admin",
"ConcurrencyStamp": "ddd53170"
},
{
"Id": "03b82b0e",
"Name": "Manager",
"ConcurrencyStamp": "65da3f89"
}
]
}
我需要的类，我不需要给你们看嵌套的类属性，你们可以在上面看到。
public class DatabaseModelCreationOptions
{
public IEnumerable<User>? Users { get; set; }
public IEnumerable<UserRole>? UserRoles { get; set; }
}
然后调用GetSection("")。得到
var dbOptions = configuration.GetSection("DatabaseModelCreationOptions")
.Get<DatabaseModelCreationOptions>();
在应用程序设置中添加一个级别。json:
{
"MySettings": {
"MyArray": [
"str1",
"str2",
"str3"
]
}
}
创建一个代表你的section的类:
public class MySettings
{
public List<string> MyArray {get; set;}
}
在你的应用启动类中，绑定你的模型并将其注入到DI服务中:
services.Configure<MySettings>(options => Configuration.GetSection("MySettings").Bind(options));
在你的控制器中，从DI服务中获取配置数据:
public class HomeController : Controller
{
private readonly List<string> _myArray;
public HomeController(IOptions<MySettings> mySettings)
{
_myArray = mySettings.Value.MyArray;
}
public IActionResult Index()
{
return Json(_myArray);
}
}
你也可以把你的整个配置模型存储在控制器的属性中，如果你需要所有的数据:
public class HomeController : Controller
{
private readonly MySettings _mySettings;
public HomeController(IOptions<MySettings> mySettings)
{
_mySettings = mySettings.Value;
}
public IActionResult Index()
{
return Json(_mySettings.MyArray);
}
}
ASP。NET Core的依赖注入服务就像一个魔法一样:)
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);
