.net core 2.0 读取配置文件

1.引用Microsoft.Extensions.Configuration  
2.在Startup中注入服务  

public static IConfiguration Configuration { get; private set; }public Startup(IConfiguration configuration){    Configuration = configuration;}public void ConfigureServices(IServiceCollection services){    //添加服务    services.AddUrlResolve(Configuration);}

扩展方法AddUrlResolve如下  

/// 
/// 拓展方法/// 
public static class Extensions{    /// 
    /// 为了保留IConfiguration    /// 
    ///     ///     public static void AddUrlResolve(this IServiceCollection services, IConfiguration config)    {        services.Add(new ServiceDescriptor(typeof(UrlResolveService), typeof(UrlResolveService), ServiceLifetime.Singleton));        //读取配置文件        UrlResolveService.ApiUrl = config["ApiUrl"];        UrlResolveService.AuthorityUrl = config["AuthorityUrl"];    }}/// 
/// 读取配置文件的服务/// 
public class UrlResolveService{    public static string AuthorityUrl { get; set; }    public static string ApiUrl { get; set; }    public string GetAuthorityUrl()    {        return AuthorityUrl;    }    public string GetApiUrl()    {        return ApiUrl;    }}

3.使用UrlResolveService服务  

public async Task Call(UrlResolveService urlResolveService){    //API对应网址    var apiUrl = urlResolveService.GetApiUrl();    //......}

4.配置文件  

{  //授权网址  "AuthorityUrl": "http://localhost:5000/",  //API网址  "ApiUrl": "http://localhost:5001/",}