Use jquery to return all types of returned data (string, set (list), and class) in JSON data format. Why use result. D (jquery ajax to return data using. d)

Source: http://www.cnblogs.com/xiaowu/archive/2011/09/07/2169283.html

Use jquery to return various types of data (String, set (list <>), Class)Why is result. D used for returning in JSON data format?

here we'll talk about JSON

JSON is simply a JavaScript Object or array.

JSON Form 1: JavaScript Object {" firstname ":" Brett "," lastname ":" McLaughlin "," email ": "aaaa"}

JSON Form 2: JavaScript Array [{" firstname ":" Brett "," lastname ":" McLaughlin "," email ": "aaaa" },

{"Firstname": "Jason", "lastname": "hunterwang", "email": "BBBB"}]

Of course, JavaScript arrays and objects can be nested. For example, in Form 1, "Brett" can be replaced with a JS array or JS object. Which form does Microsoft Ajax return? It is the first one.

By default, the Microsoft framework returns a {"D": "data returned in the background"} Here we use the test in the above example as follows:

If the string type is returned in the above example, Firefox debugging is as follows:

Firefox debugging is as follows:

The returned data is stored in the D attribute of the JS object. That's why we always use result. D to retrieve the data returned by the Microsoft framework.