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 

 1  

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

　　　　public class RouteConvention : IApplicationModelConvention
 2     {
 3         private readonly AttributeRouteModel _centralPrefix;
 4 
 5         public RouteConvention(IRouteTemplateProvider routeTemplateProvider)
 6         {
 7 
 8             _centralPrefix = new AttributeRouteModel(routeTemplateProvider);
 9         }
10 
11         //接口的Apply方法
12         public void Apply(ApplicationModel application)
13         {
14             application.Controllers.Where(d => !d.ControllerName.Contains("Base") &&
15             d.Attributes.Any(a => a.ToString().Contains(
16             "ApiControllerAttribute")))
17               .Each(controller =>
18               {
19                   controller.Selectors
20                     .Each(selectorModel =>
21                     {
　　　　　　　　　　　　　　　　//修改路由
26                         selectorModel.AttributeRouteModel = _centralPrefix;
27                     });
28               });
29         }
30     }

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)));
}