ExtJS4学习笔记(八)---Grid多选/全选

来源：互联网发布：centos系统版本命令编辑：程序博客网时间：2024/06/05 21:47

上一篇文章，在Grid中加入了搜索功能（链接地址是：www.mhzg.net/a/20115/20115219110248.html），但大量数据需要删除操作的时候，总不能一条一条去删除吧，本文介绍如何在Extjs4 Grid中加入全选功能。

先来张效果图：

点击显示所选后：

注意点：

1、需要在JS文件中动态加载“'Ext.selection.CheckboxModel'”

2、服务端要返回数据的id值。

3、Ext.data.Model中，要有id的信息，就是因为JS代码中忘记了写id，导致调试了很久都无法获取id值，从头检查代码的时候才发现错误。

正文：

html代码：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>Grid多选/全选-MHZG.NET</title><link rel="stylesheet" type="text/css" href="../../resources/css/ext-all.css" /><style type="text/css">        #search-results a {            color: #385F95;            font:bold 11px tahoma, arial, helvetica, sans-serif;            text-decoration:none;        }        .add {            background-image:url(../../examples/shared/icons/fam/cog.gif) !important;        }        #search-results a:hover {            text-decoration:underline;        }                #search-results p {            margin:3px !important;        }                .search-item {            font:normal 11px tahoma, arial, helvetica, sans-serif;            padding:3px 10px 3px 10px;            border:1px solid #fff;            border-bottom:1px solid #eeeeee;            white-space:normal;            color:#555;        }        .search-item h3 {            display:block;            font:inherit;            font-weight:bold;            color:#222;        }        .search-item h3 span {            float: right;            font-weight:normal;            margin:0 0 5px 5px;            width:100px;            display:block;            clear:none;        }                .x-form-clear-trigger {            background-image: url(../../resources/themes/images/default/form/clear-trigger.gif);        }                .x-form-search-trigger {            background-image: url(../../resources/themes/images/default/form/search-trigger.gif);        }    </style><script type="text/javascript" src="../../bootstrap.js"></script><script type="text/javascript" src="../../locale/ext-lang-zh_CN.js"></script><script type="text/javascript" src="selectgrid.js"></script></head><body><div id="demo"></div></body></html>

selectgrid.js：

Ext.Loader.setConfig({enabled: true});Ext.Loader.setPath('Ext.ux', '../../examples/ux');Ext.require([    'Ext.grid.*','Ext.toolbar.Paging','Ext.util.*',    'Ext.data.*','Ext.ux.form.SearchField','Ext.selection.CheckboxModel']);Ext.onReady(function(){    Ext.define('MyData',{    extend: 'Ext.data.Model',fields: ['id','title','author',    {name:'hits',type: 'int'}, 'addtime']});//创建数据源var store = Ext.create('Ext.data.Store', {//分页大小pageSize: 50,        model: 'MyData',//是否在服务端排序remoteSort: true,        proxy: {           //异步获取数据，这里的URL可以改为任何动态页面，只要返回JSON数据即可            type: 'ajax',            url: 'selectgrid.asp',                        reader: {                root: 'items',                totalProperty  : 'total'            },simpleSortMode: true        },        sorters: [{//排序字段。            property: 'hits',//排序类型，默认为 ASC            direction: 'DESC'        }]    });//创建多选 var selModel = Ext.create('Ext.selection.CheckboxModel');//创建Gridvar grid = Ext.create('Ext.grid.Panel',{    store: store,selModel: selModel,columnLines: true,columns: [    {text: "标题", width: 120, dataIndex: 'title', sortable: true},                {text: "作者", width: 140, dataIndex: 'author', sortable: false},                {text: "点击数", width: 100, dataIndex: 'hits', sortable: true},            {text: "添加时间", width: 150, dataIndex: 'addtime', sortable: true}        ],height:400,width:520,x:20,y:40,title: 'ExtJS4 SearchGrid-Grid 搜索',disableSelection: false,//值为TRUE，表示禁止选择行frame: true,        loadMask: true,        renderTo: 'demo',        viewConfig: {id: 'gv',trackOver: false,            stripeRows: false        },dockedItems: [{            dock: 'top',            xtype: 'toolbar',            items: [{itemId: 'Button',text:'显示所选',                tooltip:'Add a new row',                iconCls:'add',handler:function(){var record = grid.getSelectionModel().getSelection();if(record.length == 0){Ext.MessageBox.show({title:"提示",msg:"请先选择您要操作的行!"//icon: Ext.MessageBox.INFO})return;}else{var ids = "";for(var i = 0; i < record.length; i++){ids += record[i].get("id")if(i<record.length-1){ids = ids + ",";}}Ext.MessageBox.show({title:"所选ID列表",msg:ids//icon: Ext.MessageBox.INFO})}}},'-',{                width: 300,                fieldLabel: '搜索',                labelWidth: 50,                xtype: 'searchfield',                store: store            }]        }, {            dock: 'bottom',            xtype: 'pagingtoolbar',            store: store,            pageSize: 25,            displayInfo: true,            displayMsg: '显示 {0} - {1} 条，共计 {2} 条',            emptyMsg: '没有数据'        }]        })store.loadPage(1);})

服务端selectgrid.asp：

<%Response.ContentType = "text/html"Response.Charset = "UTF-8"%><%'返回JSON数据,自定义一些测试数据。。'这里的参数与EXT3.x相同，区别在于排序字段和排序方式使用了新的属性。'由于这里是测试数据，接收的参数只用到了start,limit。sorts和dir在实际操作过程中，将之加入SQL的ORDER BY里即可。start = Request("start")limit = Request("limit")'查询时获取的参数。query = Request("query")If start = "" Thenstart = 0End IfIf limit = "" Thenlimit = 50End Ifsorts = Replace(Trim(Request.Form("sort")),"'","") dir = Replace(Trim(Request.Form("dir")),"'","")'测试数据，这里直接输出结果，实际应用中，应该把查询条件放到SQL语句中。If query = "newstitle" Then    Echo("{")    Echo("""total"":")    Echo("""1")    Echo(""",""items"":[")    Echo("{")Echo("""title"":""newstitle""")Echo(",")Echo("""author"":""author""")Echo(",")Echo("""hits"":""100""")    Echo(",")    Echo("""addtime"":"""&Now()&"""")    Echo("}")    Echo("]}")ElseDim counts:counts=300'注意，这里的counts相当于Rs.RecordCount,也就是记录总数。Dim Ls:Ls = Cint(start) + Cint(limit)If Ls >= counts Then   Ls = countsEnd IfEcho("{")Echo("""total"":")Echo(""""&counts&""",")Echo("""items"":[")For i = start+1 To Ls   Echo("{")   Echo("""id"":"""&i&"""")   Echo(",")   Echo("""title"":""newstitle"&i&"""")   Echo(",")   Echo("""author"":""author"&i&"""")   Echo(",")   Echo("""hits"":"""&i&"""")   Echo(",")   Echo("""addtime"":"""&Now()&"""")   Echo("}")   If i<Ls Then     Echo(",")   End IfNextEcho("]}")End IfFunction Echo(str)   Response.Write(str)End Function%>