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[i].id +
" Data: .id="+data.records[i].data.id +
" Data: .name="+data.records[i].data.name +
" Data: .metier="+data.records[i].data.metier +
" json:"+data.records[i].json+" ");
}
alert(str);
}
</script>
</head>
<body>
<input id="Button1" onclick="ArrayData()" 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[i].id +
" Data: .id="+data.records[i].data.id +
" Data: .name="+data.records[i].data.name +
" Data: .metier="+data.records[i].data.metier +
" json:"+data.records[i].json+" ");
}
alert(str);
}
</script>
</head>
<body>
<input id="Button1" onclick="JsonData()" 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[i].id +
" Data: .id="+data.records[i].data.id +
" Data: .name="+data.records[i].data.name +
" Data: .metier="+data.records[i].data.metier +
" json:"+data.records[i].json+" ");
}
alert(outstr);
}
</script>
</head>
<body>
<input id="Button1" onclick="XmlData()" type="button" value="Xml源数据" />
</body>
</html>