C# 如何在.NET核心Mvc中处理两个路由和直接到一个操作

这是我在Startup.cs中的路线规则

routes.MapRoute(
                    name: "UnsolvedTagspecial",
                    template: "user/undo/{t}",
                    defaults: new { Controller = "user", action = "undo" }
                    );

routes.MapRoute(
                    name: "UnsolvedTag",
                    template: "user/{t}/undo",
                    defaults: new { Controller = "user", action = "undo" }
                    );

以下是我在控制器中的操作：

//Controller:
public async Task<ActionResult> undo(string t)
{
    //   .....
}

//控制器：
公共异步任务撤消（字符串t）
{
//   .....
}

• 当我输入

  http://localhost:17623/user/undo/111

  在地址行中，我在控制器函数中得到t的值为null
• 但是当我输入

  http://localhost:17623/user/111/undo

  在地址行中，我得到控制器函数中的t=111值

---

这让我很困惑，谁能告诉我原因呢？

这是因为您必须设置从最特定到最通用的路由。我想你的路线会是这样的

 routes.MapRoute(
                   name: "default",
                   template: "{controller=Home}/{action=Index}/{id?}");

routes.MapRoute(
                    name: "UnsolvedTagspecial",
                    template: "user/undo/{t}",
                    defaults: new { Controller = "user", action = "undo" }
                    );

routes.MapRoute(
                    name: "UnsolvedTag",
                    template: "user/{t}/undo",
                    defaults: new { Controller = "user", action = "undo" }
                    );

routes.MapRoute(
                    name: "UnsolvedTagspecial",
                    template: "user/undo/{t}",
                    defaults: new { Controller = "user", action = "undo" }
                    );

routes.MapRoute(
                    name: "UnsolvedTag",
                    template: "user/{t}/undo",
                    defaults: new { Controller = "user", action = "undo" }
                    );
routes.MapRoute(
                   name: "default",
                   template: "{controller=Home}/{action=Index}/{id?}");

因此，当您输入

http://localhost:17623/user/undo/111

它命中第一条路径，该路径期望111为

id

，但当它转到

action

时，参数期望

字符串t

。所以你应该这样布置路线

 routes.MapRoute(
                   name: "default",
                   template: "{controller=Home}/{action=Index}/{id?}");

routes.MapRoute(
                    name: "UnsolvedTagspecial",
                    template: "user/undo/{t}",
                    defaults: new { Controller = "user", action = "undo" }
                    );

routes.MapRoute(
                    name: "UnsolvedTag",
                    template: "user/{t}/undo",
                    defaults: new { Controller = "user", action = "undo" }
                    );

routes.MapRoute(
                    name: "UnsolvedTagspecial",
                    template: "user/undo/{t}",
                    defaults: new { Controller = "user", action = "undo" }
                    );

routes.MapRoute(
                    name: "UnsolvedTag",
                    template: "user/{t}/undo",
                    defaults: new { Controller = "user", action = "undo" }
                    );
routes.MapRoute(
                   name: "default",
                   template: "{controller=Home}/{action=Index}/{id?}");

---

从most专用到most通用这是因为您必须设置从most专用到most通用的路由。我想你的路线会是这样的

 routes.MapRoute(
                   name: "default",
                   template: "{controller=Home}/{action=Index}/{id?}");

routes.MapRoute(
                    name: "UnsolvedTagspecial",
                    template: "user/undo/{t}",
                    defaults: new { Controller = "user", action = "undo" }
                    );

routes.MapRoute(
                    name: "UnsolvedTag",
                    template: "user/{t}/undo",
                    defaults: new { Controller = "user", action = "undo" }
                    );

routes.MapRoute(
                    name: "UnsolvedTagspecial",
                    template: "user/undo/{t}",
                    defaults: new { Controller = "user", action = "undo" }
                    );

routes.MapRoute(
                    name: "UnsolvedTag",
                    template: "user/{t}/undo",
                    defaults: new { Controller = "user", action = "undo" }
                    );
routes.MapRoute(
                   name: "default",
                   template: "{controller=Home}/{action=Index}/{id?}");

因此，当您输入

http://localhost:17623/user/undo/111

它命中第一条路径，该路径期望111为

id

，但当它转到

action

时，参数期望

字符串t

。所以你应该这样布置路线

 routes.MapRoute(
                   name: "default",
                   template: "{controller=Home}/{action=Index}/{id?}");

routes.MapRoute(
                    name: "UnsolvedTagspecial",
                    template: "user/undo/{t}",
                    defaults: new { Controller = "user", action = "undo" }
                    );

routes.MapRoute(
                    name: "UnsolvedTag",
                    template: "user/{t}/undo",
                    defaults: new { Controller = "user", action = "undo" }
                    );

routes.MapRoute(
                    name: "UnsolvedTagspecial",
                    template: "user/undo/{t}",
                    defaults: new { Controller = "user", action = "undo" }
                    );

routes.MapRoute(
                    name: "UnsolvedTag",
                    template: "user/{t}/undo",
                    defaults: new { Controller = "user", action = "undo" }
                    );
routes.MapRoute(
                   name: "default",
                   template: "{controller=Home}/{action=Index}/{id?}");

---

从大多数特定的到大多数通用的

最有可能的是，在

“user/undo/{t}”

之前有一条与模式匹配的路径。显示其余的路由（包括属性路由）。我有一个默认路由@Usman。正如他所说，我解决了这个问题。最有可能的是，在

“user/undo/{t}”

之前有一条与模式匹配的路径。显示其余的路由（包括属性路由）。我有一个默认路由@Usman。我按照他说的解决了问题我的地图路线顺序和你说的一样，我还有一个问题：我的链接是这样的：

http://localhost:17623/user/undo/111

my

controller=user'和my

action=undo`为什么重定向到此规则

routes.MapRoute（名称：“默认”，模板：“{controller=Home}/{action=Index}/{id？}”）

我的MapRoute顺序和你说的一样，cry.我还有一个问题：我的链接是这样的：

http://localhost:17623/user/undo/111

my

controller=user'和my
action=undo`为什么重定向到此规则
routes.MapRoute（名称：“默认”，模板：{controller=Home}/{action=Index}/{id？}”）；