Class Ext.Ajax
Package: |
Ext |
Defined In: |
Connection.js |
Class: |
Ajax |
Extends: |
Connection
|
Global Ajax request class. Provides a simple way to make Ajax requests with maximum flexibility. Example usage:
// Basic request
Ext.Ajax.request({
url: 'foo.php'
,
success: someFn,
failure: otherFn,
headers: {
'my-header'
: 'foo'
},
params: { foo: 'bar'
}
});
// Simple ajax form submission
Ext.Ajax.request({
form: 'some-form'
,
params: 'foo=bar'
});
// Default headers to pass in
every request
Ext.Ajax.defaultHeaders = {
'Powered-By'
: 'Ext'
};
// Global Ajax events can be handled on every request!
Ext.Ajax.on('beforerequest'
, this
.showSpinner, this
);
This class is a singleton and cannot be created directly.
Config Options
Config Options
Defined By
|
disableCachingParam
: String
(Optional) Change the parameter which is sent went disabling caching through a cache buster. Defaults to '_dc'
|
Connection
|
|
listeners
: Object
A config object containing one or more event handlers to be added to this object during initialization. This should b...
A config object containing one or more event handlers to be added to this object during initialization. This should be a valid listeners config object as specified in the addListener
example for attaching multiple handlers at once.
|
Observable
|
Public Properties
Property
Defined By
|
autoAbort
: Boolean
Whether a new request should abort any pending requests. (defaults to false)
|
Ajax |
|
defaultHeaders
: Object
An object containing request headers which are added to each request made by this object. (defaults to undefined)
|
Ajax |
|
disableCaching
: Boolean
True to add a unique cache-buster param to GET requests. (defaults to true)
|
Ajax |
|
extraParams
: Object
An object containing properties which are used as extra parameters to each request made by this object. (defaults to...
An object containing properties which are used as extra parameters to each request made by this object. (defaults to undefined)
|
Ajax |
|
method
: String
The default HTTP method to be used for requests. Note that this is case-sensitive and should be all caps (defaults t...
The default HTTP method to be used for requests. Note that this is case-sensitive and should be all caps (defaults to undefined; if not set but parms are present will use "POST," otherwise "GET.")
|
Ajax |
|
timeout
: Number
The timeout in milliseconds to be used for requests. (defaults to 30000)
|
Ajax |
|
url
: String
The default URL to be used for requests to the server. (defaults to undefined)
|
Ajax |
Public Methods
Method
Defined By
|
abort
( [Number transactionId
]
) : void
Aborts any outstanding request.
Aborts any outstanding request.
|
Connection
|
|
addEvents
( Object object
) : void
Used to define events on this Observable
Used to define events on this Observable
|
Observable
|
|
addListener
( String eventName
, Function handler
, [Object scope
]
, [Object options
]
) : void
Appends an event handler to this component
Appends an event handler to this component
Parameters:
-
eventName
: String
The type of event to listen for
-
handler
: Function
The method the event invokes
-
scope
: Object
(optional) The scope in which to execute the handler function. The handler function's "this" context.
-
options
: Object
(optional) An object containing handler configuration properties. This may contain any of the following properties:
-
scope
: Object
The scope in which to execute the handler function. The handler function's "this" context.
-
delay
: Number
The number of milliseconds to delay the invocation of the handler after the event fires.
-
single
: Boolean
True to add a handler to handle just the next firing of the event, and then remove itself.
-
buffer
: Number
Causes the handler to be scheduled to run in an Ext.util.DelayedTask
delayed by the specified number of milliseconds. If the event fires again within that time, the original handler is not
invoked, but the new handler is scheduled in its place.
Combining Options
Using the options argument, it is possible to combine different types of listeners:
A normalized, delayed, one-time listener that auto stops the event and passes a custom argument (forumId)
el.on('click'
, this
.onClick, this
, {
single: true,
delay: 100,
forumId: 4
});
Attaching multiple handlers in 1 call
The method also allows for a single argument to be passed which is a config object containing properties which specify multiple handlers.
foo.on({
'click'
: {
fn: this
.onClick,
scope: this
,
delay: 100
},
'mouseover'
: {
fn: this
.onMouseOver,
scope: this
},
'mouseout'
: {
fn: this
.onMouseOut,
scope: this
}
});
Or a shorthand syntax:
foo.on({
'click'
: this
.onClick,
'mouseover'
: this
.onMouseOver,
'mouseout'
: this
.onMouseOut,
scope: this
});
Returns:
|
Observable
|
|
fireEvent
( String eventName
, Object... args
) : Boolean
Fires the specified event with the passed parameters (minus the event name).
Fires the specified event with the passed parameters (minus the event name).
|
Observable
|
|
hasListener
( String eventName
) : Boolean
Checks to see if this object has any listeners for a specified event
Checks to see if this object has any listeners for a specified event
|
Observable
|
|
isLoading
( [Number transactionId
]
) : Boolean
Determine whether this object has a request outstanding.
Determine whether this object has a request outstanding.
|
Connection
|
|
on
( String eventName
, Function handler
, [Object scope
]
, [Object options
]
) : void
Appends an event handler to this element (shorthand for addListener)
Appends an event handler to this element (shorthand for addListener)
Parameters:
-
eventName
: String
The type of event to listen for
-
handler
: Function
The method the event invokes
-
scope
: Object
(optional) The scope in which to execute the handler function. The handler function's "this" context.
-
options
: Object
(optional)
Returns:
|
Observable
|
|
purgeListeners
() : void
Removes all listeners for this object
Removes all listeners for this object
|
Observable
|
|
relayEvents
( Object o
, Array events
) : void
Relays selected events from the specified Observable as if the events were fired by this
.
Relays selected events from the specified Observable as if the events were fired by this
.
|
Observable
|
|
removeListener
( String eventName
, Function handler
, [Object scope
]
) : void
|
Observable
|
|
request
( [Object options
]
) : Number
Sends an HTTP request to a remote server. Important: Ajax server requests are asynchronous, and this call will return...
Sends an HTTP request to a remote server.
Important:
Ajax server requests are asynchronous, and this call will return before the response has been received. Process any returned data in a callback function.
To execute a callback function in the correct scope, use the scope
option.
Parameters:
-
options
: Object
An object which may contain the following properties:
-
url
: String/Function (Optional)
The URL to which to send the request, or a function to call which returns a URL string. The scope of the function is specified by the scope
option. Defaults to configured URL.
-
params
: Object/String/Function (Optional)
An object containing properties which are used as parameters to the request, a url encoded string or a function to call to get either. The scope of the function is specified by the scope
option.
-
method
: String (Optional)
The HTTP method to use for the request. Defaults to the configured method, or if no method was configured, "GET" if no parameters are being sent, and "POST" if parameters are being sent. Note that the method name is case-sensitive and should be all caps.
-
callback
: Function (Optional)
The function to be called upon receipt of the HTTP response. The callback is called regardless of success or failure and is passed the following parameters:
-
success
: Function (Optional)
The function to be called upon success of the request. The callback is passed the following parameters:
-
failure
: Function (Optional)
The function to be called upon failure of the request. The callback is passed the following parameters:
-
scope
: Object (Optional)
The scope in which to execute the callbacks: The "this" object for the callback function. If the url
, or params
options were specified as functions from which to draw values, then this also serves as the scope for those function calls. Defaults to the browser window.
-
form
: Element/HTMLElement/String (Optional)
The <form>
Element or the id of the <form>
to pull parameters from.
-
isUpload
: Boolean (Optional)
True if the form object is a file upload (will usually be automatically detected).
File uploads are not performed using normal "Ajax" techniques, that is they are not
performed using XMLHttpRequests. Instead the form is submitted in the standard manner with the DOM <form>
element temporarily modified to have its target
set to refer to a dynamically generated, hidden <iframe>
which is inserted into the document but removed after the return data has been gathered.
The server response is parsed by the browser to create the document for the IFRAME. If the server is using JSON to send the return object, then the Content-Type
header must be set to "text/html" in order to tell the browser to insert the text unchanged into the document body.
The response text is retrieved from the document, and a fake XMLHttpRequest object is created containing a responseText
property in order to conform to the requirements of event handlers and callbacks.
Be aware that file upload packets are sent with the content type multipart/form
and some server technologies (notably JEE) may require some custom processing in order to retrieve parameter names and parameter values from the packet content.
-
headers
: Object (Optional)
Request headers to set for the request.
-
xmlData
: Object (Optional)
XML document to use for the post. Note: This will be used instead of params for the post data. Any params will be appended to the URL.
-
jsonData
: Object/String (Optional)
JSON data to use as the post. Note: This will be used instead of params for the post data. Any params will be appended to the URL.
-
disableCaching
: Boolean (Optional)
True to add a unique cache-buster param to GET requests.
The options object may also contain any other property which might be needed to perform postprocessing in a callback because it is passed to callback functions.
Returns:
|
Connection
|
|
resumeEvents
() : void
|
Observable
|
|
serializeForm
( String/HTMLElement form
) : String
Serialize the passed form into a url encoded string
Serialize the passed form into a url encoded string
Parameters:
-
form
: String/HTMLElement
Returns:
|
Ajax |
|
suspendEvents
() : void
|
Observable
|
|
un
( String eventName
, Function handler
, [Object scope
]
) : void
Removes a listener (shorthand for removeListener)
Removes a listener (shorthand for removeListener)
|
Observable
|
Public Events
Event
Defined By
|
beforerequest
: ( Connection conn
, Object options
)
Fires before a network request is made to retrieve a data object.
Fires before a network request is made to retrieve a data object.
Listeners will be called with the following arguments:
-
conn
: Connection
This Connection object.
-
options
: Object
The options config object passed to the request
method.
|
Connection
|
|
requestcomplete
: ( Connection conn
, Object response
, Object options
)
Fires if the request was successfully completed.
Fires if the request was successfully completed.
Listeners will be called with the following arguments:
-
conn
: Connection
This Connection object.
-
response
: Object
-
options
: Object
The options config object passed to the request
method.
|
Connection
|
|
requestexception
: ( Connection conn
, Object response
, Object options
)
Fires if an error HTTP status was returned from the server. See HTTP Status Code Definitions for details of HTTP stat...
Fires if an error HTTP status was returned from the server. See HTTP Status Code Definitions
for details of HTTP status codes.
Listeners will be called with the following arguments:
-
conn
: Connection
This Connection object.
-
response
: Object
-
options
: Object
The options config object passed to the request
method.
|
Connection
|
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汇总ajax 的几种框架的帮助文档包括dwr,jquery,ext mootools,prototype,scriptaclous
ExtJS是一个用javascript、CSS和HTML等技术实现的主要用于创建RIA即富客户端,且与后台技术无关的前端Ajax框架。 常用于企业内部管理系统、行政系统等SAP类型的应用。 1) 提供了非常多的丰富、功能强大的组件。 2)...
Ext 2.0 JSP/AJAX开发包,基于Google Web Toolkit(GWT)和 ExtJs 的网页开发控件库,非常适合进行纯Java语言的Internet 应用的快速开发。是搭配JSP环境最佳的大型AJAX可视化操作控件库,本压缩包内富含示例及API文档...
Ext3.0新特性一览 1.轻量级、高速的base库 2.flash报表api接口 3.Ext.DIrect 远程和数据流支持 4.继承客户端和服务器端数据绑定 ...10.增强了ext.ajax 11.浏览器历史支持 当然最期待的还是IDE拉!!
ext 本地使用api手册,ext 爱好者非常好的使用帮助文档 ,本地api手册
ExtJS由一系列的类库组成,一旦页面成功加载... 实用工具Utils:Ext提供了很多的实用工具,可以方便我们实现如数据内容格式化、JSON数据解码或反解码、对Date、Array、发送Ajax请求、Cookie管理、CSS管理等扩展等功能.
Ext 中文 API很好用的,本人最近在学习ext js 很多都是在那上面学习的,特意推荐个大家,上面还有一些 例子
Ext2.2API中文版.CHM Ext3.2中文API.CHM FILESLIST111.TXT Hibernate3.2.chm html5参考手册.chm HTML入门与提高.CHM Html标签一览表.chm html语法教程.chm HTTP1.1.chm J2EE_1.5_API.CHM J2EE_1.6_API.chm Java+EE+6...
基于EXT1.1的API参考文档,并附有常用的一些EXT AJAX实例演示,包括动态菜单、网页标签、窗口等的应用。
Ext是一个优秀的JS AJAX框架,这里是ExtJs4.1中文API,感谢翻译组.