Asp.net Vnext Routing

概述

本文已经同步到《Asp.net Vnext 系列教程 》中]

ASP.NET 路由系统是主要负责两个操作:

它将传入的 HTTP 请求映射到路由处理程序给出的路由的集合。

路由系统的责任是找到匹配的路由，创建路由数据，并将请求分配给一个处理程序。
选择动作是 MVC 的处理程序的实现细节。它使用路由数据和从传入请求其他信息来选择要执行的操作
代码实现TemplateRoute 类初始化路由和 URL 模板

public class MyTemplateRoute : TemplateRoute
{
public MyTemplateRoute(IRouteBuilder routeCollectionBuilder)
: base(routeCollectionBuilder.DefaultHandler,
"{controller}/{action}/{id?}",
new RouteValueDictionary(new { controller = "Home", action = "Index" }),
new RouteValueDictionary(new { }),
new RouteValueDictionary(new { }),
routeCollectionBuilder.ServiceProvider.GetService<IInlineConstraintResolver>())
{
}

public override Task RouteAsync(RouteContext context)
{
return base.RouteAsync(context);
}
}

启动类

public class Startup
{
// For more information on how to configure your application, visit http://go.microsoft.com/fwlink/?LinkID=398940 public void ConfigureServices(IServiceCollection services)
{
services.AddMvc();
}

public void Configure(IApplicationBuilder app)
{
app.UseMvc(routes =>

{
//加入模板 默认http://http://localhost/Home/Index
routes.Routes.Add(new MyTemplateRoute(routes));

});
}
}

实现IRouter添加默认路由

public class DefaultRoute : IRouter
{

private readonly IRouter _next;

public DefaultRoute(IRouter next)
{
_next = next;
}

public VirtualPathData GetVirtualPath(VirtualPathContext context)
{
return _next.GetVirtualPath(context);
}

public async Task RouteAsync(RouteContext context)
{

var oldRouteData = context.RouteData;
var newRouteData = new RouteData(oldRouteData);
newRouteData.Routers.Add(_next);
newRouteData.Values["controller"] = "Home";
newRouteData.Values["action"] = "Index";
try
{
context.RouteData = newRouteData;
await _next.RouteAsync(context);
}
finally
{
if (!context.IsHandled)
{
context.RouteData = oldRouteData;
}

}
}

}

public void Configure(IApplicationBuilder app)
{
app.UseMvc(routes =>

{
//加入模板 默认http://http://localhost/Home/Index
//  routes.Routes.Add(new MyTemplateRoute(routes));

routes.MapRoute("default", "{controller}/{action}");
//加入路由处理 默认http://http://localhost/Home/Index
routes.Routes.Add(new DefaultRoute(routes.DefaultHandler));

});
}

实现IRouteConstraint约束

public class DateConstraint : IRouteConstraint
{
public bool Match(HttpContext httpContext, IRouter route, string routeKey, IDictionary<string, object> values, RouteDirection routeDirection)
{
return values["controller"] == "Home";
}
}

public void Configure(IApplicationBuilder app)
{
app.UseMvc(routes =>

{
//加入模板 默认http://http://localhost/Home/Index
//  routes.Routes.Add(new MyTemplateRoute(routes));

//routes.MapRoute("default", "{controller}/{action}");
////加入路由处理 默认http://http://localhost/Home/Index
//routes.Routes.Add(new DefaultRoute(routes.DefaultHandler));

//加入约束
routes.MapRoute(name: "TestRoute", template: "{*constraints}", defaults: new { controller = "Home", action = "Index" }, constraints: new { constraint = new DateConstraint() });

});
}

路由特性

public class HomeController : Controller
{

//PUT   http://localhost/AB [AcceptVerbs("PUT", Route = "AB")]
// Patch  http://localhost/AB [HttpPatch("AB")]
//PUT   http://localhost/Home/AB [AcceptVerbs("PUT", Route = "Home/AB")]
//Patch   http://localhost/Home/AB [HttpPatch("Home/Ab")]

// ABC 动作 可以被以下地址访问
//PUT   http://localhost/AB // Patch  http://localhost/AB //PUT   http://localhost/Home/AB //Patch   http://localhost/Home/AB public IActionResult  ABC()
{

return Content("1");
}
}

}

RouteConstraintAttribute 路由约束

public class CountrySpecificAttribute : RouteConstraintAttribute
{
public CountrySpecificAttribute(string countryCode)
: base("country", countryCode, blockNonAttributedActions: true)
{
}
}

应用在控制上



添加路由条目

routes.MapRoute(
"products",
"Products/{country}/{action}",
defaults: new { controller = "Products" })yu

运行截图





Area

//区域名
[Area("Admin")]
//路由
[Route("[area]/Users")]
public class UserManagementController : Controller
{

[HttpGet("All")]
public IActionResult ListUsers()
{
return Content("11");
}
}

添加路由条目

routes.MapRoute("areaRoute",
"{area:exists}/{controller}/{action}",
new { controller = "Home", action = "Index" });