为asp.net core 自定义路由动态修改

根据IApplicationModelConvention 接口 实现相应的方法 

/// <summary>
/// 定义个类RouteConvention，private 来实现 IApplicationModelConvention 接口
/// </summary>

　　　　public class RouteConvention : IApplicationModelConvention
    {
        private readonly AttributeRouteModel _centralPrefix;

        public RouteConvention(IRouteTemplateProvider routeTemplateProvider)
        {

            _centralPrefix = new AttributeRouteModel(routeTemplateProvider);
        }

        //接口的Apply方法
        public void Apply(ApplicationModel application)
        {
            application.Controllers.Where(d => !d.ControllerName.Contains("Base") &&
            d.Attributes.Any(a => a.ToString().Contains(
            "ApiControllerAttribute")))
              .Each(controller =>
              {
                  controller.Selectors
                    .Each(selectorModel =>
                    {
　　　　　　　　　　　　　　　　//修改路由
                        selectorModel.AttributeRouteModel = _centralPrefix;
                    });
              });
        }
    }

然后我们在statup中 配置mvcoption

servers.AddMvc(opts=>{ 
  string apirouter = configuration["apirouter"];
                if (apirouter.IsNullOrEmpty())
                {
                    apirouter = "api/v{version}/[controller]";
                }
// 添加我们自定义 实现IApplicationModelConvention的RouteConvention
            opts.Conventions.Insert(0, new RouteConvention(new RouteAttribute(apirouter)));
}