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(, new RouteConvention(new RouteAttribute(apirouter)));
}