asp.net core 默认注入了configuration配置服务，configuration可以从命令行、环境变量、配置文件读取配置。
这边主要演示从appsettings.json文件读取配置
1.读取单节点配置
1 2 3 | {"name":"pxp"} |
1 2 3 4 5 6 7 8 9 10 11 12 13 | //在控制器注入Iconfiguration private IConfiguration _configuration; public WeatherForecastController( IConfiguration configuration) { _configuration = configuration; } [HttpGet(Name = "GetWeatherForecast")] public IEnumerable Get() { var name = _configuration.GetSection("name"); Console.WriteLine("读取配置：" + name ); return null; } |
2.读取嵌套节点
1 2 3 4 5 6 7 | {"info":{ "name":"pxp", "age":"23", "sex":"男"}} |
1 2 | //读取info里面的name var name = _configuration.GetSection("info：name"); |
3.映射到实体
1 2 3 4 5 6 | public class Info{public string name{get;set;}public string age{get;set;}public string sex{get;set;}} |
1 2 | var info= _configuration.GetSection("info");string name= info.get().name; |
4.注入服务，映射到实体
1 2 3 | //在program中注入// 读取配置到实体类builder.Services.Configure(builder.Configuration.GetSection("Info")); |
//使用Ioptions接口接收
1 2 3 4 5 6 7 8 9 10 11 12 13 | private readonly IOptions _myConfig;public WeatherForecastController(IOptions myConfigOptions) { _myConfig = myConfigOptions; _configuration = configuration; } [HttpGet(Name = "GetWeatherForecast")] public IEnumerable Get() { Console.WriteLine("读取配置：" + _myConfig.Value.name); return null; } |
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