Asp.net Vnext Routing
2024-04-19 17:20:11
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("");
}
} }
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("");
}
}
添加路由条目
routes.MapRoute("areaRoute",
"{area:exists}/{controller}/{action}",
new { controller = "Home", action = "Index" });
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