TAILIEUCHUNG - Lập trình .net 4.0 và visual studio 2010 part 46

MVC là rất nhiều thiết lập để tích hợp dễ dàng với các khuôn khổ JavaScript phổ biến như jQuery. Để biết thêm thông tin về jQuery, xin tham khảo Chương 12. | CHAPTER 13 MVC Attributes You have already utilized a number of attributes such as AcceptVerbs and Bind. Attributes extend MVC s functionality and you can even create your own. Let s take a quick look at some important attributes. AcceptVerbs You have already used the AcceptVerbs attribute to distinguish between load and update methods in the Film controller. OutputCache OutputCache is perhaps one of the most useful attributes to reduce load on the server. If your data is changing infrequently consider using OutputCache. The duration is specified in minutes. To use it simply add above your action method OutputCache Duration 20 VaryByParam None public ActionResult News return View Authorization Another important attribute is Authorization. It is used in conjunction with the standaed security providers and allows you to restrict access to a function. The standard template MVC project shows you how to use this. To use it simply add above your method as follows Authorize Roles Admin public ActionResult All return View MVC and JavaScript MVC is very much set up for easy integration with popular JavaScript frameworks such as jQuery. For more information on jQuery please refer to Chapter 12. You will create a new edit page that utilizes the jQuery libraries to send the contents of a form to the edit controller. To do this you will format the data as JSON. JSON stands for JavaScript Object Notation and is a very lightweight format to pass around simple classes and properties. In the film example a film class formatted as JSON might look something like this ID 1 Title Kung Fu Panda 312 CHAPTER 13 MVC JSON is very easy to construct and has the advantage that JavaScript frameworks understand JSON objects allowing you to easily access properties with code like this alert JSON is also a lot less verbose than a typical SOAP request which might look like this xml version encoding utf-8 soap .

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