extjs中model的HasMany和belongTo读取xml数据的用法

来源：互联网发布：软件的功能界面编辑：程序博客网时间：2024/04/28 12:05

论坛上看到的提问，于是就研究了一下，终于得出store中list嵌套如何用HasMany和BelongTo实现。

先看界面源码

<html>
<head>


<title> Cache Server Page </title>

<link rel="stylesheet" type="text/css" href="extjs/resources/css/ext-all.css"/>
<script src="extjs/resources/ext-all.js"></script>
<script src="extjs/resources/ext-lang-zh_CN.js"></script>
</head>

<body>
<script type="text/javascript">

Ext.onReady(function(){
Ext.QuickTips.init();
Ext.define('common.teacher',{
     extend:'Ext.data.Model',
     fields:['name'],
     proxy: {
        type: 'ajax',
        url:'Test.TestApplication.TestOneToMany.cls',
        reader: {
            type: 'xml',
            //root: 'teacherList'
            record:'teacher'
        }
     },
     hasMany:{model:'common.student', name:'students'}
});
Ext.define('common.student',{
   extend:'Ext.data.Model',
   proxy: {
        type: 'ajax',
        url:'Test.TestApplication.TestOneToMany.cls',
        reader: {
            type: 'xml',
            root: 'students',
            record:'name'
        }
       },
   fields:[{name:'name',mapping:'/'}],
   belongsTo:'common.teacher'
});

var tstore = Ext.create('Ext.data.Store', {
    storeId:'simpsonsStore',
    model:'common.teacher'
});
tstore.load({
callback:function(records){
console.log(records);
alert(records.length);
alert(records[0].students().count());
}
});
Ext.create('Ext.grid.Panel', {
    title: 'Simpsons',
    store:tstore,
    title:'老师姓名',
    columns: [
        { header: 'teName', dataIndex:'name' },
        {
            xtype:'actioncolumn',
            width:50,
            items: [{
           icon:'resources/images/confirm.png',
                tooltip: '查看学生姓名',
                handler: function(grid, rowIndex, colIndex) {
                    var rec= grid.getStore().getAt(rowIndex);
                    Ext.create('Ext.window.Window', {
                     title: "老师姓名:"+rec.get('name'),
                    height: 200,
                  width: 400,
    layout: 'fit',
    items: { // Let's put an empty grid in just to illustrate fit layout
        xtype: 'grid',
        border: false,
        columns: [
        { header: '学生姓名', dataIndex:'name',flex:1 },

    ],              // One header just for show. There's no data,
        store: rec.students() // A dummy empty data store
    }
}).show();
                }
            }
            ]
        }
    ],
    height: 200,
    width: 400,
    renderTo: Ext.getBody()
});

});
</script>
</body>
</html>
后台从文件读取xml文件的内容：

Class Test.TestApplication.TestOneToMany Extends %CSP.Page
{

ClassMethod OnPage()As %Status
{
;Write "<?xml version=""1.0"" ?>",!
s file=##class(%FileCharacterStream).%New()
s file.Filename="C:/person.xml"
w file.Read()
Quit $$$OK
}

Parameter CONTENTTYPE ="text/xml";

}

//注意：此后台代码为ensemble开发平台使用的M语言

加载过来的xml文件为：

<?xml version="1.0" encoding="UTF-8"?>
<teacherList>
    <teacher>
        <name>teacher1</name>
        <students>
            <name>student1_1</name>
            <name>student1_2</name>
        </students>
    </teacher>
    <teacher>
        <name>teacher2</name>
        <students>
            <name>student2_1</name>
            <name>student2_2</name>
        </students>
    </teacher>
</teacherList>

看效果图：

点击后显示该老师所带的学生：