Question

继续关于Using IConfiguration globally in mvc6的StackOverflow问题。对已接受答案的评论建议使用

services.Configure<SomeOptions>(Configuration);

现在使用以下代码可以正常工作;

类

public class SomeOptions
{
    public string MyOption { get; set; }
}

config.json

{
    "MyOption": "OptionValue"
}

Startup.cs

public Startup(IHostingEnvironment env)
{
    Configuration = new Configuration()
        .AddJsonFile("config.json")
        .AddEnvironmentVariables();
}

public void ConfigureServices(IServiceCollection services)
{        
    services.Configure<SomeOptions>(Configuration);
}

然而，config.json文件没有任何真正的结构，我希望它看起来更像;

{
    "SomeOptions": {
        "MyOption": "OptionValue"
    }
}

但是，这不会绑定类中的值。无论如何都允许这个吗？

Answer 1

如果您想更改config.json结构，还需要更改类结构。

{
    "SomeOptions": {
        "MyOption": "OptionValue"
    }
}

映射到类似

的内容

public class SomeOptions
{
    public List<MyOption> MyOptions { get; set; }
}

public class MyOption
{
    public string OptionValue { get; set; }
}

Answer 2

您可以在config.json中访问特定值，如：

Configuration.Get("SomeOptions:MyOption");

返回

"OptionValue"

所以，你的代码将是

services.Configure<SomeOptions>(options => 
        options.MyOption = Configuration.Get("SomeOptions:MyOption"));

Answer 3

{
    "data" : [
        {
            "_id" : 36,
            "lat" : 36.1212111,
            "lon" : 127.2312112
        },
        {
            "_id" : 37,
            "lat" : 36.1212111,
            "lon" : 127.9817112
        },
        {
            "_id" : 38,
            "lat" : 36.1212111,
            "lon" : 128.2312112
        },
        {
            "_id" : 39,
            "lat" : 36.1212111,
            "lon" : 128.8312112
        }
    ],
    "uuid" : 999999999
}
{
    "data" : [
        {
            "_id" : 30,
            "lat" : 36.1212111,
            "lon" : 120.2312112
        },
        {
            "_id" : 31,
            "lat" : 36.1212111,
            "lon" : 120.2345112
        },
        {
            "_id" : 32,
            "lat" : 36.1212111,
            "lon" : 120.2378112
        },
        {
            "_id" : 33,
            "lat" : 36.1212111,
            "lon" : 120.2378112
        },
        {
            "_id" : 34,
            "lat" : 36.1212111,
            "lon" : 120.2423112
        },
        {
            "_id" : 35,
            "lat" : 36.1212111,
            "lon" : 120.2467112
        }
    ],
    "uuid" : 123123123
}

应该这样做。

使用services.Configure从config.json配置属性

3 个答案: