net.core – Records And Memorys

nuget 多安装 Microsoft.Extensions.DependencyInjection
Microsoft.Extensions.Options

https://ballardsoftware.com/adding-appsettings-json-configuration-to-a-net-core-console-application/ 怎么绑定 json config 文件，但不能实时更新

http://www.10tiao.com/html/391/201901/2654073587/4.html

https://stackoverflow.com/questions/38515965/cannot-set-configuration-from-json-appsettings-file-in-net-core-project

https://offering.solutions/blog/articles/2017/02/17/automatically-reload-typed-configuration-in-asp-net-core/ asp 的做法，但不是 c# console-application/

https://stackoverflow.com/questions/51969527/ioptionssnapshot-in-net-core-console-application-not-working 已经很接近的问题

当config值改变时，能通知应用程序
https://stackoverflow.com/questions/53604397/how-can-i-build-an-ioptionsmonitort-for-testing

例子： https://github.com/aspnet/Logging/issues/874

代码

using System;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Configuration.Binder;
using Microsoft.Extensions.Configuration.Json;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Options;

using System.Threading;
using Newtonsoft.Json;
namespace ConsoleApp1
{
    class Program
    {
        //static void ConfigureServices(IServiceCollection serviceCollection)
        //{

        //    // build configuration
        //    var configuration = new ConfigurationBuilder()
        //   .AddJsonFile("appsettings.json", optional: true, reloadOnChange: true)
        //   .Build();

        //    serviceCollection.AddSingleton()
        //    serviceCollection.Configure<AppSettings>(configuration.GetSection("Configuration"));

        //    // add services 
        //    serviceCollection.AddTransient<ITestService, TestService>();

        //    // add app
        //    serviceCollection.AddTransient<App>();
        //}
        //private static IServiceProvider provider;
        //private static EventReceiver receiver;


        static void Main(string[] args)
        {

            var config = new ConfigurationBuilder()
            .AddJsonFile("appsettings.json", optional: false, reloadOnChange: true)
            .Build();

            var services = new ServiceCollection();

            //services.AddLogging(b =>
            //{
            //    b.AddConfiguration(config);
            //    b.AddConsole();
            //});

            services.AddOptions();
            services.Configure<MySettings>(config.GetSection("MySettings"));


            using (var sp = services.BuildServiceProvider())
            {
                var options = sp.GetRequiredService<IOptionsMonitor<MySettings>>();
                options.OnChange((o, name) => Console.WriteLine($"Name = {name}, Hash = {o.GetHashCode()}, Content = {JsonConvert.SerializeObject(o)}"));
            }

            Console.ReadLine();

            /*
            string sURL;


            var build = new ConfigurationBuilder()
           .AddJsonFile("appsettings.json", optional: true, reloadOnChange: true);


            // IConfiguration config = new ConfigurationBuilder()
            //.AddJsonFile("appsettings.json", optional: true, reloadOnChange: true)
            //.Build();


            IConfigurationRoot configuration = build.Build();



            IServiceProvider provider = new ServiceCollection()
                .Configure<MySettings>(
                    configuration.GetSection("MySettings"))
                .AddTransient<CheckOption>()
                .BuildServiceProvider();



            //var services = new ServiceCollection();
            //services.AddOptions();

            //services.Configure<MySettings>(configuration.GetSection("MySettings"));

            //var sp = services.BuildServiceProvider();

            //sURL = configuration["LocalServer"];


            while (true)
            {
                Thread.Sleep(1000);
                //configuration.Reload();
                //sURL = configuration["LocalServer"];

                CheckOption checkOption =
                    provider.GetRequiredService<CheckOption>();
                //checkOption.Run();


                //IOptionsSnapshot<MySettings> settings = sp.GetRequiredService<IOptionsSnapshot<MySettings>>();
                //var options = sp.GetService<IOptionsSnapshot<MySettings>>();
                //Console.WriteLine(options.Value.CurrentServer);

                //Console.WriteLine(settings.Value.CurrentServer);

                Console.WriteLine(checkOption.Run());
                //Console.WriteLine(sERRNAP);
            }




            //// create service collection
            //var serviceCollection = new ServiceCollection();
            //ConfigureServices(serviceCollection);

            //// create service provider
            //var serviceProvider = serviceCollection.BuildServiceProvider();

            //// entry to run app
            //serviceProvider.GetService<App>().Run();

             *////

        }

        private static void ConfigureServices(IServiceCollection services)
        {


        }

    }



    public class CheckOption
    {
        public MySettings _AppSettings;

        public CheckOption(IOptionsSnapshot<MySettings> appSettings)
        {
            _AppSettings = appSettings.Value;
        }

        public string Run()
        {
            string option1 = _AppSettings.CurrentServer;
            //string option2 = _AppSettings.Option2;
            return option1;
        }
    }




    //public class CheckOption
    //{
    //    public AppSettings _AppSettings;

    //    public CheckOption(IOptionsSnapshot<AppSettings> appSettings)
    //    {
    //        _AppSettings = appSettings.Value;
    //    }

    //    public void Run()
    //    {
    //        string option1 = _AppSettings.Option1;
    //        string option2 = _AppSettings.Option2;
    //    }
    //}

    public class MySettings
    {
        public string CurrentServer { get; set; }
    }
}

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using System;

using Microsoft.Extensions.Configuration;

using Microsoft.Extensions.Configuration.Binder;

using Microsoft.Extensions.Configuration.Json;

using Microsoft.Extensions.DependencyInjection;

using Microsoft.Extensions.Options;

using System.Threading;

using Newtonsoft.Json;

namespace ConsoleApp1

{

class Program

{

//static void ConfigureServices(IServiceCollection serviceCollection)

//{

// // build configuration

// var configuration = new ConfigurationBuilder()

// .AddJsonFile("appsettings.json", optional: true, reloadOnChange: true)

// .Build();

// serviceCollection.AddSingleton()

// serviceCollection.Configure<AppSettings>(configuration.GetSection("Configuration"));

// // add services

// serviceCollection.AddTransient<ITestService, TestService>();

// // add app

// serviceCollection.AddTransient<App>();

//}

//private static IServiceProvider provider;

//private static EventReceiver receiver;

static void Main(string[] args)

{

var config = new ConfigurationBuilder()

.AddJsonFile("appsettings.json", optional: false, reloadOnChange: true)

.Build();

var services = new ServiceCollection();

//services.AddLogging(b =>

//{

// b.AddConfiguration(config);

// b.AddConsole();

//});

services.AddOptions();

services.Configure<MySettings>(config.GetSection("MySettings"));

using (var sp = services.BuildServiceProvider())

{

var options = sp.GetRequiredService<IOptionsMonitor<MySettings>>();

options.OnChange((o, name) => Console.WriteLine($"Name = {name}, Hash = {o.GetHashCode()}, Content = {JsonConvert.SerializeObject(o)}"));

}

Console.ReadLine();

string sURL;

var build = new ConfigurationBuilder()

.AddJsonFile("appsettings.json", optional: true, reloadOnChange: true);

// IConfiguration config = new ConfigurationBuilder()

//.AddJsonFile("appsettings.json", optional: true, reloadOnChange: true)

//.Build();

IConfigurationRoot configuration = build.Build();

IServiceProvider provider = new ServiceCollection()

.Configure<MySettings>(

configuration.GetSection("MySettings"))

.AddTransient<CheckOption>()

.BuildServiceProvider();

//var services = new ServiceCollection();

//services.AddOptions();

//services.Configure<MySettings>(configuration.GetSection("MySettings"));

//var sp = services.BuildServiceProvider();

//sURL = configuration["LocalServer"];

while (true)

{

Thread.Sleep(1000);

//configuration.Reload();

//sURL = configuration["LocalServer"];

CheckOption checkOption =

provider.GetRequiredService<CheckOption>();

//checkOption.Run();

//IOptionsSnapshot<MySettings> settings = sp.GetRequiredService<IOptionsSnapshot<MySettings>>();

//var options = sp.GetService<IOptionsSnapshot<MySettings>>();

//Console.WriteLine(options.Value.CurrentServer);

//Console.WriteLine(settings.Value.CurrentServer);

Console.WriteLine(checkOption.Run());

//Console.WriteLine(sERRNAP);

}

//// create service collection

//var serviceCollection = new ServiceCollection();

//ConfigureServices(serviceCollection);

//// create service provider

//var serviceProvider = serviceCollection.BuildServiceProvider();

//// entry to run app

//serviceProvider.GetService<App>().Run();

*////

}

private static void ConfigureServices(IServiceCollection services)

{

}

public class CheckOption

{

public MySettings _AppSettings;

public CheckOption(IOptionsSnapshot<MySettings> appSettings)

{

_AppSettings = appSettings.Value;

}

public string Run()

{

string option1 = _AppSettings.CurrentServer;

//string option2 = _AppSettings.Option2;

return option1;

}

//public class CheckOption

//{

// public AppSettings _AppSettings;

// public CheckOption(IOptionsSnapshot<AppSettings> appSettings)

// {

// _AppSettings = appSettings.Value;

// }

// public void Run()

// {

// string option1 = _AppSettings.Option1;

// string option2 = _AppSettings.Option2;

// }

//}

public class MySettings

{

public string CurrentServer { get; set; }

}

配套配置文件：

{
"MySettings": {
 "CurrentServer": "XBACTaaabbbccXXX"
},
 "LocalServer": "XBACTwwwaaa"
}

{

"MySettings": {

"CurrentServer": "XBACTaaabbbccXXX"

"LocalServer": "XBACTwwwaaa"

}

Category: net.core

Net.core 当配置改变时触发回调函数