Ext.data的理解
来源:互联网 发布:python snmpwalk函数 编辑:程序博客网 时间:2024/05/17 02:34
Ext.data命名空间下有三个类。
DataProxy:数据源
DataReader:数据解析器
Store:数据存储器
DataProxy:proxy是代理的意思。意思就是获取数据的代理。这个里面定义的属性是从哪里获得的数据,如何获取数据。数据的来源有内存、有本地、有xml中、有远程数据库服务器等等。它有三个子类,MemoryProxy、HttpProxy、和scriptTagProxy.
MemoryProxy:获取来自内存的数据,可以是数组、json、或者XML
HttpProxy:使用HTTP协议通过ajax从远程服务器获取数据的代理,需要制定url
ScriptTagProxy:功能和HttpProxy一样,但是支持跨域获取数据。
定义一个二维数据
var myData = [
['3m Co',71.72,0.02,0.03,'9/1 12:00am'],
['Alcoa Inc',29.01,0.42,1.47,'9/1 12:00am'],
['Altria Group Inc',83.81,0.28,0.34,'9/1 12:00am'],
['American Express Company',52.55,0.01,0.02,'9/1 12:00am'],
['American International Group, Inc.',64.13,0.31,0.49,'9/1 12:00am'],
['AT&T Inc.',31.61,-0.48,-1.54,'9/1 12:00am'],
['Boeing Co.',75.43,0.53,0.71,'9/1 12:00am'],
['Caterpillar Inc.',67.27,0.92,1.39,'9/1 12:00am'],
['Citigroup, Inc.',49.37,0.02,0.04,'9/1 12:00am'],
['E.I. du Pont de Nemours and Company',40.48,0.51,1.28,'9/1 12:00am'],
['Exxon Mobil Corp',68.1,-0.43,-0.64,'9/1 12:00am'],
['General Electric Company',34.14,-0.08,-0.23,'9/1 12:00am'],
['General Motors Corporation',30.27,1.09,3.74,'9/1 12:00am'],
['Hewlett-Packard Co.',36.53,-0.03,-0.08,'9/1 12:00am'],
['Honeywell Intl Inc',38.77,0.05,0.13,'9/1 12:00am'],
['Intel Corporation',19.88,0.31,1.58,'9/1 12:00am'],
['International Business Machines',81.41,0.44,0.54,'9/1 12:00am'],
['Johnson & Johnson',64.72,0.06,0.09,'9/1 12:00am'],
['JP Morgan & Chase & Co',45.73,0.07,0.15,'9/1 12:00am'],
['McDonald/'s Corporation',36.76,0.86,2.40,'9/1 12:00am'],
['Merck & Co., Inc.',40.96,0.41,1.01,'9/1 12:00am'],
['Microsoft Corporation',25.84,0.14,0.54,'9/1 12:00am'],
['Pfizer Inc',27.96,0.4,1.45,'9/1 12:00am'],
['The Coca-Cola Company',45.07,0.26,0.58,'9/1 12:00am'],
['The Home Depot, Inc.',34.64,0.35,1.02,'9/1 12:00am'],
['The Procter & Gamble Company',61.91,0.01,0.02,'9/1 12:00am'],
['United Technologies Corporation',63.26,0.55,0.88,'9/1 12:00am'],
['Verizon Communications',35.57,0.39,1.11,'9/1 12:00am'],
['Wal-Mart Stores, Inc.',45.45,0.73,1.63,'9/1 12:00am']
];
var myProxy = new Ext.data.MemoryProxy(data);
//此处已经包含了一个Read
var store = new Ext.data.ArrayStore({
fields: [
{name: 'company'},
{name: 'price', type: 'float'},
{name: 'change', type: 'float'},
{name: 'pctChange', type: 'float'},
{name: 'lastChange', type: 'date', dateFormat: 'n/j h:ia'}
]
});
// manually load local data
store.loadData(myData);
- Ext.data的理解
- 理解Ext.data.JsonStore 对象
- EXT 的Ext.data.DWRProxy
- Ext.data.JsonStore的用法
- Ext.data.SimpleStore的使用方法
- Ext.data.JsonReader的用法
- Ext.applyIf和Ext.applyIf的理解
- Ext中数据读取器Ext.data.DataReader的学习
- 访问Ext.data.store的数据
- Ext.data.JsonReader的fields属性详解
- Ext.data.Store的基本用法
- Ext.data.Store的基本用法
- 动态改变Ext.data.store的Url
- 关于Ext.data.ArrayStore的用法
- Ext.data.Store.find的精确查找
- Ext.data.Store的基本用法
- ExtJs教程----Ext.data.Model的Ajax
- [Extjs6]浅谈Ext.data.Store的使用.
- 实验:用OpenSSL命令行生成证书
- 调用门实战(1)----调用门跳转
- NESI—概念和内涵
- 我来了
- 傅里叶变换的意义
- Ext.data的理解
- C语言变量声明内存分配
- 服务器自动开机
- 短信自动拦截程序自启动设置
- 你有这样做过需求分析和设计吗?
- 同一server下不同client传输请求
- 获取输入法
- java入门小程序—17人游戏(丢手绢问题)
- 微软研究院科大实习生聚餐