Ext2.2 ArrayReader/JsonReader/XmlRead
说明: 代码来源网络, 原代码某些地方在Ext2.2中有错.ArrayReader, 注意new Ext.data.ArrayReader({}, ... );
<html><head><link rel="stylesheet" type="text/css" href="../../resources/css/ext-all.css" /><script type="text/javascript" src="../../adapter/ext/ext-base.js"></script><script type="text/javascript" src="../../ext-all.js"></script><script type="text/javascript"> //数据源为数组的ArrayReader function ArrayData() { var arr=[ [ 'Bill', 'Gardener',1],['Ben', 'Horticulturalist',2]]; var reader = new Ext.data.ArrayReader({}, [ {name: 'name', mapping: 0},//对应字符:Bill {name: 'metier', mapping: 1},//对应字符:Gardener {name: 'id',mapping:2}//对应数字:1,如果第一个元素定义，则可以省略 ] ); //生成元数据 var data=reader.readRecords(arr); var str=""; for(var i=0;i<data.records.length;i++) { str = str.concat( " totalRecords:"+data.totalRecords + " ID:"+data.records.id + " Data: .id="+data.records.data.id + " Data: .name="+data.records.data.name + " Data: .metier="+data.records.data.metier + " json:"+data.records.json+" "); } alert(str); } </script></head><body> <input id="Button1"type="button" value="数组源数据" /></body></html>
JsonReader
<html><head><link rel="stylesheet" type="text/css" href="../../resources/css/ext-all.css" /><script type="text/javascript" src="../../adapter/ext/ext-base.js"></script><script type="text/javascript" src="../../ext-all.js"></script><script type="text/javascript"> function JsonData() { var json={ 'results': 2, //设定此对象的总个数,与rows数组长度一致，需要手动设定 'rows': [ { id: 1, name: 'Bill', metier: 'Gardener' }, { id: 2, name: 'Ben', metier: 'Horticulturalist' } ] }; var reader=new Ext.data.JsonReader( { totalProperty: "results",//totalRecords属性由json.results得到(省略此参数也能得到总条数) root: "rows", //构造元数据的数组由json.rows得到 id: "id" //id由json.id得到 },[ {name:'id',mapping:'id'}, {name: 'name', mapping: 'name'}, {name: 'metier'} //如果name与mapping同名,可以省略mapping ] ) var data=reader.readRecords(json); var str=""; for(var i=0;i<data.records.length;i++) { //标识列 保存的数组被转换为对象 Json数据 str = str.concat( " totalRecords:"+data.totalRecords +//数据总条数 " ID:"+data.records.id + " Data: .id="+data.records.data.id + " Data: .name="+data.records.data.name + " Data: .metier="+data.records.data.metier + " json:"+data.records.json+" "); } alert(str); } </script></head><body> <input id="Button1"type="button" value="Json源数据" /></body></html>
XmlReader
<html><head><link rel="stylesheet" type="text/css" href="../../resources/css/ext-all.css" /><script type="text/javascript" src="../../adapter/ext/ext-base.js"></script><script type="text/javascript" src="../../ext-all.js"></script><script type="text/javascript"> function XmlData() { var str=['<?xml version="1.0" encoding="utf-8" ?>', "<dataset>", "<results>2</results>", "<row>", "<id>1</id>", "<name>Bill</name>", "<occupation>Gardener</occupation>", "</row>", "<row>", "<id>2</id>", "<name>Ben</name>", "<occupation>Horticulturalist</occupation>", "</row>", "</dataset>"].join(""); //生成xmldocument对象 var xmlDocument; if(Ext.isIE){ xmlDocument = new ActiveXObject("Msxml2.FreeThreadedDOMDocument") xmlDocument.async=false; xmlDocument.resolveExternals = false; xmlDocument.loadXML(str) } else{ xmlDocument = (new DOMParser()).parseFromString(str, "text/xml"); } //然后开始和其它两个reader一样的用法,只是这儿换了一种写法,recordtype也可以是一个record对象 //record对象的属性映射 var record = Ext.data.Record.create([ {name: 'name', mapping: 'name'}, // "mapping" property not needed if it's the same as "name" {name: 'metier',mapping:'occupation'}, // This field will use "occupation" as the mapping. {name:'id'} ]) var reader = new Ext.data.XmlReader({ totalRecords: "results", record: "row", //row是节点选择器 id: "id" }, record); var data=reader.readRecords(xmlDocument); var outstr=""; for(var i=0;i<data.records.length;i++) { //标识列 保存的数组被转换为对象 Json数据 outstr = outstr.concat( " totalRecords:"+data.totalRecords +//数据总条数 " ID:"+data.records.id + " Data: .id="+data.records.data.id + " Data: .name="+data.records.data.name + " Data: .metier="+data.records.data.metier + " json:"+data.records.json+" "); } alert(outstr); } </script></head><body> <input id="Button1"type="button" value="Xml源数据" /></body></html>
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