c# - Endpoints.MapControllerRoute 模式含义

Question

在这样的模式中分配 Controller 名称和 Action 名称有什么用

endpoints.MapControllerRoute(
                name:"default",
                pattern: "{controller=home}/{action=index}/{id?}"
                );

Answer 1

像这样的模式

"{controller=home}/{action=index}/{id?}"

告诉 ASP.NET Core，如果 URL 以路径 /MyController/MyAction/MyId123 结尾，它应该将请求分派(dispatch)给 Controller 内的方法 MyAction 我的 Controller 。该方法可能如下所示:

public class MyController {
    public IActionResult MyAction(string id) {
        // ...
    }
}

现在，通过添加 =home 和 =index，您可以给它一个默认值，并有效匹配所有未映射到现有 Controller 和操作的请求到 HomeController:Index 方法。

来自docs :

The route template "{controller=Home}/{action=Index}/{id?}":

• Matches a URL path like /Products/Details/5

• Extracts the route values { controller = Products, action = Details, id = 5 } by tokenizing the path. The extraction of route valuesresults in a match if the app has a controller namedProductsController and a Details action:

  public class ProductsController : Controller {
      public IActionResult Details(int id)
      {
          return ControllerContext.MyDisplayRouteInfo(id);
      } 
  } 
  

• {controller=Home} defines Home as the default controller.

• {action=Index} defines Index as the default action.

• The ? character in {id?} defines id as optional.