>#Configuration 配置框架：让服务无缝适应各种环境 [TOC] <br/> 核心组件包 ------------ <br/> - Microsoft.Extensions.Configuration.Abstractions - Microsoft.Extensions.Configuration <br/> 配置框架 ------------ <br/> - 以 key-value 字符串键值对的方式抽象了配置 - 支持从各种不同的数据源读取配置（比如：命令行读取，从环境变量读取，从文件读取） <br/> 配置框架核心类型 ------------ <br/> - IConfiguration - IConfigurationRoot （表示配置的根系|完成读取配置的操作实例） - IConfigurationSection （当我们不仅仅是通过key-value获取配置的时候使用，通过冒号(:)做分割） - IConfigurationBuilder (构建我们配置的核心) <br/> 配置框架扩展点 ------------ <br/> - IConfigurationSource - IConfigurationProvider <br/> 简单运用 ------------ <br/> >###项目结构  >###通过键值对获取 <br/> >示例代码 ```csharp IConfigurationBuilder builder = new ConfigurationBuilder(); builder.AddInMemoryCollection(new Dictionary<string, string>() { { "key1","value1" }, { "key2","value2" }, { "section1:key4","value3" } }); IConfigurationRoot configurationRoot = builder.Build(); //IConfiguration config = configurationRoot; Console.WriteLine(configurationRoot["key1"]); Console.WriteLine(configurationRoot["key2"]); ``` >结果  >###通过 IConfigurationSection 获取分组数据 <br/> >添加代码 ```csharp IConfigurationSection section = configurationRoot.GetSection("section1"); Console.WriteLine($"key4:{section["key4"]}"); Console.WriteLine($"key5:{section["key5"]}"); ``` >结果  >###通过 IConfigurationSection 获取多重分组数据 <br/> >修改代码 ```csharp IConfigurationBuilder builder = new ConfigurationBuilder(); builder.AddInMemoryCollection(new Dictionary<string, string>() { { "key1","value1" }, { "key2","value2" }, { "section1:key4","value3" }, { "section2:key5","value5" }, { "section2:key6","value6" }, { "section2:section3:key7","value7" }, }); IConfigurationRoot configurationRoot = builder.Build(); //IConfiguration config = configurationRoot; Console.WriteLine(configurationRoot["key1"]); Console.WriteLine(configurationRoot["key2"]); IConfigurationSection section = configurationRoot.GetSection("section1"); Console.WriteLine($"key4:{section["key4"]}"); Console.WriteLine($"key5:{section["key5"]}"); IConfigurationSection section2 = configurationRoot.GetSection("section2"); Console.WriteLine($"key6:{section2["key6"]}"); var section3 = section2.GetSection("section3"); Console.WriteLine($"key7:{section3["key7"]}"); ``` >运行结果