ServiceStack NetCoreAppSettings 配置文件读取和设置 _ServiceStack

学向勤中得，萤窗万卷书。这篇文章主要讲述ServiceStack NetCoreAppSettings 配置文件读取和设置相关的知识，希望能为你提供帮助。
假设Node和npm已经安装
npm install -g @servicestack/cli
执行命令dotnet-new selfhost SSHost
这样就创建了ServiceStack的控制台程序，用VS2017解决方案，添加如下代码

using Funq; using Microsoft.AspNetCore.Builder; using Microsoft.AspNetCore.Hosting; using Microsoft.Extensions.Configuration; using Microsoft.Extensions.DependencyInjection; using ServiceStack; using SSHost.ServiceInterface; using System; using System.IO; using System.Threading.Tasks; namespace SSHost { public class Program { public static void Main(string[] args) { var host = new WebHostBuilder() .UseKestrel() .UseContentRoot(Directory.GetCurrentDirectory()) .UseStartup< Startup> () .UseUrls(Environment.GetEnvironmentVariable("ASPNETCORE_URLS") ?? "http://localhost:5000/") .Build(); host.Run(); } }public class Startup {public IConfiguration Configuration { get; set; } public Startup(IConfiguration configuration) => Configuration = configuration; // This method gets called by the runtime. Use this method to add services to the container. public void ConfigureServices(IServiceCollection services) {}// This method gets called by the runtime. Use this method to configure the HTTP request pipeline. public void Configure(IApplicationBuilder app, IHostingEnvironment env) { //nuget里添加Microsoft.Extensions.Configuration.json，否则编译不认识AddJsonFile var builder = new ConfigurationBuilder() .SetBasePath(env.ContentRootPath) .AddJsonFile($"appsettings.json", optional: true) .AddEnvironmentVariables(); Configuration = builder.Build(); app.UseServiceStack(new AppHost { AppSettings = new NetCoreAppSettings(Configuration) }); app.Run(context => { context.Response.Redirect("/metadata"); return Task.FromResult(0); }); } }public class AppHost : AppHostBase { public AppHost() : base("SSHost", typeof(MyServices).Assembly) { }public class PageConfig { public int LightListPageSize { get; set; }public int GatewayListPageSize { get; set; } }public override void Configure(Container container) { SetConfig(new HostConfig { DebugMode = AppSettings.Get(nameof(HostConfig.DebugMode), false) }); #region 读取或者设置NetCoreAppSettings//读取单个值 Console.WriteLine($"MaxRecords: {AppSettings.GetString("MaxRecords")}"); //读取对象属性 Console.WriteLine($"PageConfig: {AppSettings.GetString("PageConfig:LightListPageSize")}"); //读取整个对象 var pageConfig = AppSettings.Get< PageConfig> ("PageConfig"); Console.WriteLine($"ConnectionString: {AppSettings.GetString("ConnectionStrings:DefaultConnection")}"); //设置每页记录最大数量为200 AppSettings.Set< int> ("MaxRecords", 200); Console.WriteLine($"MaxRecords: {AppSettings.GetString("MaxRecords")}"); pageConfig.LightListPageSize = 50; pageConfig.GatewayListPageSize = 60; //设置属性，然后读取对象 AppSettings.Set< int> ("PageConfig:LightListPageSize", 50); var pageConfig2 = AppSettings.Get< PageConfig> ("PageConfig"); Console.WriteLine("设置配置完毕"); #endregion} } }

项目SSHost里添加配置文件appsettings.Json，里面配置内容如下

{ "MaxRecords": "300", "PageConfig": { "LightListPageSize": "10", "GatewayListPageSize": "20" }, "ConnectionStrings": { "DefaultConnection": "Server=(localdb)\\\\MSSQLLocalDB; Database=_CHANGE_ME; Trusted_Connection=True; MultipleActiveResultSets=true" } }

编译运行，出现如下错误信息

1> ------ 已启动全部重新生成: 项目: SSHost.ServiceModel, 配置: Debug Any CPU ------ 1> SSHost.ServiceModel -> D:\\SSHost\\SSHost.ServiceModel\\bin\\Debug\\netstandard2.0\\SSHost.ServiceModel.dll 2> ------ 已启动全部重新生成: 项目: SSHost.ServiceInterface, 配置: Debug Any CPU ------ 2> SSHost.ServiceInterface -> D:\\SSHost\\SSHost.ServiceInterface\\bin\\Debug\\netstandard2.0\\SSHost.ServiceInterface.dll 3> ------ 已启动全部重新生成: 项目: SSHost, 配置: Debug Any CPU ------ 4> ------ 已启动全部重新生成: 项目: SSHost.Tests, 配置: Debug Any CPU ------ 4> SSHost.Tests -> D:\\SSHost\\SSHost.Tests\\bin\\Debug\\netcoreapp2.1\\SSHost.Tests.dll 3> Program.cs(47,20,47,31): error CS1061: “IConfigurationBuilder”未包含“AddJsonFile”的定义，并且找不到可接受第一个“IConfigurationBuilder”类型参数的可访问扩展方法“AddJsonFile”(是否缺少 using 指令或程序集引用?) 3> 已完成生成项目“SSHost.csproj”的操作 - 失败。 ========== 全部重新生成: 成功 3 个，失败 1 个，跳过 0 个 ==========

nuget里添加Microsoft.Extensions.Configuration.json，否则编译不认识AddJsonFile
再次编译运行

ServiceStack NetCoreAppSettings 配置文件读取和设置

文章图片

总结一下，ServiceStack的AppSettings功能非常强大，并且非常好用，不仅支持过去的Web.config，也支持.Net Core的appsettings.json，还支持文本文件
【ServiceStack NetCoreAppSettings 配置文件读取和设置】想了解更多的情况，可以查看文档：https://github.com/ServiceStack/docs/blob/master/docs/_documentation/AppSettings.md