路由值繫結

給出一些預設路由，如 {controller=Home}/{action=Index}/{id?}，如果你有 url https://stackoverflow.com/questions/1558902

這將轉到 QuestionsController，值 1558902 將對映到索引操作的 id 引數，即

public ActionResult Index(int? id){
     //id would be bound to id of the route
}