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?
设置。json文件:
{
"AppSetting": {
"ProfileDirectory": "C:/Users/",
"Database": {
"Port": 7002
},
"Backend": {
"RunAsAdmin": true,
"InstallAsService": true,
"Urls": [
"http://127.0.0.1:8000"
],
"Port": 8000,
"ServiceName": "xxxxx"
}
}
}
code
代码:
public static IConfigurationRoot GetConfigurationFromArgs(string[] args, string cfgDir)
{
var builder = new ConfigurationBuilder()
.SetBasePath(cfgDir)
.AddCommandLine(args ?? new string[0]) // null in UnitTest null will cause exception
.AddJsonFile(Path.Combine(cfgDir, "setting.json"), optional: true, reloadOnChange: true)
.AddEnvironmentVariables()
// .AddInMemoryollection(configDictionary)
;
var config = builder.Build();
return config;
}
你可以使用services.AddOptions<AppSettingOption>("AppSetting")或者直接从iconfigationroot对象获取Object。
var cfg = GetConfigurationFromArgs(args, appDataDirectory);
cfg.GetSection("AppSetting").Get<AppSettingOption>()
输出:
{App.AppSettingOption}
Backend: {App.BackendOption}
Database: {App.DatabaseOption}
ProfileDirectory: "C:/Users/"
灯塔3.1
Json配置:
"TestUsers":
{
"User": [
{
"UserName": "TestUser",
"Email": "Test@place.com",
"Password": "P@ssw0rd!"
},
{
"UserName": "TestUser2",
"Email": "Test2@place.com",
"Password": "P@ssw0rd!"
}]
}
然后创建一个User.cs类，它具有与上面Json配置中的User对象对应的auto属性。然后你可以引用Microsoft.Extensions.Configuration.Abstractions并执行以下操作:
List<User> myTestUsers = Config.GetSection("TestUsers").GetSection("User").Get<List<User>>();
这是一个老问题了，但是我可以给出一个用c# 7标准更新的。net Core 2.1的答案。假设我只在appsettings.Development.json中有一个列表，例如:
"TestUsers": [
{
"UserName": "TestUser",
"Email": "Test@place.com",
"Password": "P@ssw0rd!"
},
{
"UserName": "TestUser2",
"Email": "Test2@place.com",
"Password": "P@ssw0rd!"
}
]
我可以在Microsoft.Extensions.Configuration.IConfiguration被实现并像这样连接的任何地方提取它们:
var testUsers = Configuration.GetSection("TestUsers")
.GetChildren()
.ToList()
//Named tuple returns, new in C# 7
.Select(x =>
(
x.GetValue<string>("UserName"),
x.GetValue<string>("Email"),
x.GetValue<string>("Password")
)
)
.ToList<(string UserName, string Email, string Password)>();
现在我有了一个良好类型对象的列表。如果我点击testUsers.First()， Visual Studio现在应该会显示“用户名”、“电子邮件”和“密码”选项。
.Net Core 7.x中处理对象的不同方法
在appsettings.json:
{
"People": [
{ "FirstName": "Glen", "LastName": "Johnson", "Age": 30 },
{ "FirstName": "Matt", "LastName": "Smith", "Age": 40 },
{ "FirstName": "Fred", "LastName": "Williams", "Age": 50 }
]
}
Person类:
public class Person
{
public string FirstName { get; set; }
public string LastName { get; set; }
public int Age { get; set; }
}
在代码中:
var appConfig = App.Current.AppConfiguration; // Or could be passed in through DI
var children = appConfig.GetSection("People")
.GetChildren()
.ToList();
var people = new List<Person>();
foreach (var child in children)
{
var rec = new Person
{
FirstName = appConfig[$"{child.Path}:FirstName"],
LastName = appConfig[$"{child.Path}:LastName"],
Age = int.Parse(appConfig[$"{child.Path}:Age"]),
};
people.Add(rec);
}
你可以像这样使用Microsoft.Extensions.Configuration.Binder包:
在你的appsettings.json中
{
"MyArray": [
"str1",
"str2",
"str3"
]
}
创建保存配置的对象:
public class MyConfig
{
public List<string> MyArray { get; set; }
}
在你的控制器绑定配置:
public class HomeController : Controller
{
private readonly IConfiguration _config;
private readonly MyConfig _myConfig = new MyConfig();
public HomeController(IConfiguration config)
{
_config = config;
}
public IActionResult Index()
{
return Json(_config.Bind(_myConfig));
}
}
