ASP.NET MVC 5 Attribute Routing

Enable attribute route

Global.asax

public class MvcApplication : System.Web.HttpApplication
{
    protected void Application_Start()
    {
        // Enable attribute route
        RouteTable.Routes.MapMvcAttributeRoutes();
 
        AreaRegistration.RegisterAllAreas();
        RouteConfig.RegisterRoutes(RouteTable.Routes);
    }
}

or

RouteConfig.cs

public class RouteConfig
{
    public static void RegisterRoutes(RouteCollection routes)
    {
        routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
            
        // Enable attribute route
        routes.MapMvcAttributeRoutes();
 
        AreaRegistration.RegisterAllAreas();
 
        routes.MapRoute(
            name: "Default",
            url: "{controller}/{action}/{id}",
            defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
        );
    }
}

Direct route

public class BookController : Controller {
 
    // Map to 'http://prhythm.com.tw/Pet/10'
    [Route("Pet/{id}")]
    public ActionResult Pet(int? id) {
        return View();
    }
 
}

Optional paramter

public class BookController : Controller {
 
    // Optional parameter id
    // Map to 'http://prhythm.com.tw/Pet'
    //     or 'http://prhythm.com.tw/Pet/5'
    [Route("Pet/{id?}")]
    public ActionResult Pet(int? id) {
        return View();
    }
 
}

Default parameter value

public class BookController : Controller {
    
    // Default value of id
    // Map to 'http://prhythm.com.tw/Pet'
    //     or 'http://prhythm.com.tw/Pet/10'
    [Route("Pet/{id=10}")]
    public ActionResult Pet(int? id) {
        return View();
    }
 
}

Paramter constrains

public class BookController : Controller {
    
    // Paramters constrains
    [Route("Pet/{id:int}")]
    public ActionResult Pet(int? id) {
        return View();
    }
 
}

Constraint	Description	Example
alpha	Matches uppercase or lowercase Latin alphabet characters (a-z, A-Z)	{x:alpha}
bool	Matches a Boolean value.	{x:bool}
datetime	Matches a DateTime value.	{x:datetime}
decimal	Matches a decimal value.	{x:decimal}
double	Matches a 64-bit floating-point value.	{x:double}
float	Matches a 32-bit floating-point value.	{x:float}
guid	Matches a GUID value.	{x:guid}
int	Matches a 32-bit integer value.	{x:int}
length	Matches a string with the specified length or within a specified range of lengths.	{x:length(6)} {x:length(1,20)}
long	Matches a 64-bit integer value.	{x:long}
max	Matches an integer with a maximum value.	{x:max(10)}
maxlength	Matches a string with a maximum length.	{x:maxlength(10)}
min	Matches an integer with a minimum value.	{x:min(10)}
minlength	Matches a string with a minimum length.	{x:minlength(10)}
range	Matches an integer within a range of values.	{x:range(10,50)}
regex	Matches a regular expression.	{x:regex(^\d{3}-\d{3}-\d{4}$)}

Route prefix

[RoutePrefix("Booking")]
public class BookController : Controller {
 
    // Map to 'http://prhythm.com.tw/Booking'
    //     or 'http://prhythm.com.tw/Booking/Pet'
    [Route]    
    [Route("Pet")]
    public ActionResult Pet() {
        return View();
    }
 
    // Map to 'http://prhythm.com.tw/Booking/Edit'
    [Route("Edit")
    public ActionResult Edit() {
        return View();
    }
}

Override route prefix

[RoutePrefix("Booking")]
public class BookController : Controller {
 
    // Override route prefix
    // Map to 'http://prhythm.com.tw/Pet'
    [Route("~/Pet")]
    public ActionResult Pet() {
        return View();
    }
}

Default route

[RoutePrefix("Booking")]
[Route("action=pet")]
public class BookController : Controller {
 
    // Map to 'http://prhythm.com.tw/Booking'
    //     or 'http://prhythm.com.tw/Booking/Pet'
    public ActionResult Pet() {
        return View();
    }
 
    // Map to 'http://prhythm.com.tw/Booking/Edit'
    public ActionResult Edit() {
        return View();
    }
}

Route area

[RouteArea("Backend")]
[RoutePrefix("News")]
public class NewsController : Controller {
 
    // Map to 'http://prhythm.com.tw/backend/news'
    public ActionResult Index() {
        return View();
    }
 
}

[RouteArea("Backend", AreaPrefix = "Admin")]
[RoutePrefix("News")]
public class NewsController : Controller {
 
    // Map to 'http://prhythm.com.tw/admin/news'
    public ActionResult Index() {
        return View();
    }
 
}

Reference http://sampathloku.blogspot.tw/2013/11/attribute-routing-with-aspnet-mvc-5.html

Reference http://blogs.msdn.com/b/webdev/archive/2013/10/17/attribute-routing-in-asp-net-mvc-5.aspx

Asynchronous and deferred JavaScript execution explained

• Normal execution <script>
  This is the default behavior of the <script> element. Parsing of the HTML code pauses while the script is executing. For slow servers and heavy scripts this means that displaying the webpage will be delayed.
• Deferred execution <script defer>
  Simply put: delaying script execution until the HTML parser has finished. A positive effect of this attribute is that the DOM will be available for your script. However, since not every browser supports defer yet, don’t rely on it!
• Asynchronous execution <script async>
  Don’t care when the script will be available? Asynchronous is the best of both worlds: HTML parsing may continue and the script will be executed as soon as it’s ready. I’d recommend this for scripts such as Google Analytics.

Reference : http://peter.sh/experiments/asynchronous-and-deferred-javascript-execution-explained/

Reference : http://www.html5rocks.com/en/tutorials/speed/script-loading/