public static object Bind(this IConfig config, Type type)
{
var instance = Activator.CreateInstance(type);
config.Bind(type.Name, instance);
return(instance);
}
public static IServiceCollection AddOrderService(this IServiceCollection services, Microsoft.Extensions.Configuration.IConfiguration configuration)
{
#region 通常的写法
//services.Configure<OrderServiceOptions>(configuration);
#endregion
#region 验证方式1
//services.AddOptions<OrderServiceOptions>().Configure(options =>
//{
// configuration.Bind(options);
//}).Validate(options => {
// return options.MaxOrderCount < 100;
//}, "MaxOrderCount不能小于100");
#endregion
#region 验证方式二
//services.AddOptions<OrderServiceOptions>().Configure(options =>
//{
// configuration.Bind(options);
//}).ValidateDataAnnotations();
#endregion
#region 验证方式三
services.AddOptions <OrderServiceOptions>().Configure(options =>
{
configuration.Bind(options);
}).Services.AddSingleton <IValidateOptions <OrderServiceOptions>, OrderServieValidateOptions>();
#endregion
//定义实例化服务之后的自动动作
//services.PostConfigure<OrderServiceOptions>(options => { options.MaxOrderCount += 100; });
//services.AddScoped<IOrderService, OrderService>();//scope
services.AddSingleton <IOrderService, OrderService>();//单例
return(services);
}
public static T Bind <T>(this IConfig config)
where T : class, new() => (T)config.Bind(typeof(T));