启动中的ASP.NET Core配置部分 [英] ASP.NET Core Configuration Section in Startup

问题描述

我正在将一个ASP.NET 5 RC1项目迁移到ASP.NET Core，并且遇到了一个我尚未发现或找到解决方案的有趣问题.

I am migrating a ASP.NET 5 RC1 project to ASP.NET Core, and have come across an interesting issue I've not yet seen, or found a solution for.

为了在启动"中使用配置设置，我以前已经通过以下方式检索了配置

In order to use configuration settings within Startup I have previously retrived the configuration the following way

// Works fine for DI both in ASP.NET 5 RC1 and ASP.NET Core
services.Configure<SomeConfigurationClass>(Configuration.GetSection("SomeConfigurationSection"));

// How I previous retrieved the configuration for use in startup. 
// No longer available in ASP.NET Core
var someConfigurationToUseLater = Configuration.Get<SomeConfigurationClass>("SomeConfigurationSection");

更新到ASP.NET Core 1.0后，似乎Configuration.Get< T>()不再可用.

After updating to ASP.NET Core 1.0 it seems Configuration.Get<T>() is no longer available.

我尝试更新代码以使用Configuration.GetValue< T>()，但是这似乎不适用于对象，并且仅在提供值的路径时才有效.这样就为我的配置类的 most 提供了一种变通方法，例如

I have tried updating the code to use Configuration.GetValue<T>() however this does not seem to work with objects and will only work when providing a path to a value. This has left me with a workaround for most of my configuration classes like so

var someConfigurationName = "someConfiguration";    
var someConfigurationClass = new SomeConfigurationClass()
{
    Value1 = Configuration.GetValue<string>($"{someConfigurationName}:value1"),
    Foo = Configuration.GetValue<string>($"{someConfigurationName}:foo"),
    Bar = Configuration.GetValue<string>($"{someConfigurationName}:bar")
};

但是，当配置类包含对象数组时，这是一个问题.在我的情况下，一组Client对象

However this is an issue when the configuration class contains an array of objects. In my case an array of Client objects

public class ClientConfiguration
{
    public Client[] Clients { get; set; }
}

具有以下配置

"configuredClients": {
  "clients": [
    {
      "clientName": "Client1",
      "clientId": "Client1"
    },
    {
      "clientName": "Client2",
      "clientId": "Client2"
    }
  ]
}

以前该位置绑定到我的配置类的Clients属性没有问题，但我再也找不到在ASP.NET Core 1.0中做到这一点的方法

Where this would previously bind to the Clients property of my configuration class no problem, I can no longer find a way of doing so in ASP.NET Core 1.0

推荐答案

更新后的答案
对于ASP Core 1.1.0，通用模型绑定现在使用Get:

Updated Answer
For ASP Core 1.1.0 generic model binding is now done using Get:

var config = Configuration.GetSection("configuredClients").Get<ClientConfiguration>();

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原始答案
怎么样:

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Original Answer
How about this:

var config = Configuration.GetSection("configuredClients").Bind<ClientConfiguration>();

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