在Ext里面经常会用到多选的组件: multiselect
我这里给出的是Ext 3.1.1的例子。里面有些地方需要注意,我会在下面进行说明
下面是HTML
<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /> <title>MultiSelect & ItemSelector</title> <link rel="stylesheet" type="text/css" href="../../resources/css/ext-all.css" /> <link rel="stylesheet" type="text/css" href="../ux/css/MultiSelect.css"/> <link rel="stylesheet" type="text/css" href="../shared/examples.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" src="../ux/MultiSelect.js"></script> <script type="text/javascript" src="../ux/ItemSelector.js"></script> <script type="text/javascript" src="multiselect-demo.js"></script> <script type="text/javascript" src="../shared/examples.js"></script> </head> <body> <h1>MultiSelect & ItemSelector</h1> <p>The js is not minified so it is readable. See <a href="multiselect-demo.js">multiselect-demo.js</a>.</p> <b>MultiSelect</b><br /> <p>Press Save with no items selected to see an example of validation applied.</p> <div id="multiselect" class="demo-ct" style="margin-bottom:15px;"></div> <b>ItemSelector</b><br /> <p>Supports drag and drop, double-click, button move/reorder, etc. <div id="itemselector" class="demo-ct"></div> </body> </html>
下面是JS
/*! * Ext JS Library 3.1.1 * Copyright(c) 2006-2010 Ext JS, LLC * [email protected] * http://www.extjs.com/license */ Ext.onReady(function(){ Ext.QuickTips.init(); Ext.form.Field.prototype.msgTarget = 'side'; /* * Ext.ux.form.MultiSelect Example Code */ var msForm = new Ext.form.FormPanel({ title: 'MultiSelect Test', width: 700, bodyStyle: 'padding:10px;', renderTo: 'multiselect', items:[{ xtype: 'multiselect', fieldLabel: 'Multiselect<br />(Required)', name: 'multiselect', width: 250, height: 200, allowBlank:false, store: [[123,'One Hundred Twenty Three'], ['1', 'One'], ['2', 'Two'], ['3', 'Three'], ['4', 'Four'], ['5', 'Five'], ['6', 'Six'], ['7', 'Seven'], ['8', 'Eight'], ['9', 'Nine']], tbar:[{ text: 'clear', handler: function(){ msForm.getForm().findField('multiselect').reset(); } }], ddReorder: true }], tbar:[{ text: 'Options', menu: [{ text: 'Set Value (2,3)', handler: function(){ msForm.getForm().findField('multiselect').setValue('2,3'); } },{ text: 'Toggle Enabled', handler: function(){ var m = msForm.getForm().findField('multiselect'); if (!m.disabled) { m.disable(); } else { m.enable(); } } }] }], buttons: [{ text: 'Save', handler: function(){ if(msForm.getForm().isValid()){ Ext.Msg.alert('Submitted Values', 'The following will be sent to the server: <br />'+ msForm.getForm().getValues(true)); } } }] }); var ds = new Ext.data.ArrayStore({ data: [[123,'One Hundred Twenty Three'], ['1', 'One'], ['2', 'Two'], ['3', 'Three'], ['4', 'Four'], ['5', 'Five'], ['6', 'Six'], ['7', 'Seven'], ['8', 'Eight'], ['9', 'Nine']], fields: ['value','text'], sortInfo: { field: 'value', direction: 'ASC' } }); /* * Ext.ux.form.ItemSelector Example Code */ var isForm = new Ext.form.FormPanel({ title: 'ItemSelector Test', width:700, bodyStyle: 'padding:10px;', renderTo: 'itemselector', items:[{ xtype: 'itemselector', name: 'itemselector', fieldLabel: 'ItemSelector', imagePath: '../ux/images/', multiselects: [{ width: 250, height: 200, store: ds, displayField: 'text', valueField: 'value' },{ width: 250, height: 200, store: [['10','Ten']], tbar:[{ text: 'clear', handler:function(){ isForm.getForm().findField('itemselector').reset(); } }] }] }], buttons: [{ text: 'Save', handler: function(){ if(isForm.getForm().isValid()){ Ext.Msg.alert('Submitted Values', 'The following will be sent to the server: <br />'+ isForm.getForm().getValues(true)); } } }] }); });
【注意:】这里要说明的是,如何取得多选框中的数值的问题。
在Ext给出的例子中, msForm.getForm().getValues(true) 取值之后,
打印出来是: multiselect=1%2C2%2C3%2C4
这个结果是被decode之后的,可以顺利的放在url里面传给后台。
但是:如果我们需要在前台处理我们的选项,或者我们不想用上面给出的decode之后的结果传递给后台,该如何处理呢?
其实很简单,需要注意2个地方。
1、在 xtype: 'multiselect', 下面有表单的name的配置:name: 'multiselect',
这里的name,就是你取得数据的关键。
2、例子中取出数据的是这条语句:
msForm.getForm().getValues(true)
我们也需要对它进行改造。如下:
var selectItems = msForm.getForm().getValues().multiselect;
这个 selectItems 就是我们要的数值。通过 alert(selectItems.constructor); 我们可以知道,selectItems 是一个字符串,里面的数值用逗号,进行了串联。我们来处理这个逗号,分割的字符串就可以得到一个数组。就是我们要的数值