為asp.net core 自定義路由動態修改

根據IApplicationModelConvention 接口 實現相應的方法 

/// <summary>
/// 定義個類RouteConvention，private 來實現 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;
                    });
              });
        }
    }

然后我們在statup中 配置mvcoption

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