Ext如何对本地数据进行分页显示

  ext加载数据时,分页功能一般通过服务器返回需要显示的数据,返回多少显示多少,即使stroe配置了pageSize属性,而返回的数据量大于pageSize定义的,多余的数据还是会显示出来。所以按照一般的方式创建store数据源加载本地数据,会一次性显示完所有的数据,而没有分页效果(虽然页脚的分页导航出来了)。

 

  要对客户端数据进行分页,可以使用别人已经写好的Ext.ux.data.PagingMemoryProxy扩展,已经集成到Ext中,一般下载的示例代码文件夹中都会有个ux文件夹,包含了Ext.ux.data.PagingMemoryProxy的定义。

 

  下面为Ext对客服端数据进行分页的效果对比,分别使用Ext.data.MemoryProxy和Ext.ux.data.PagingMemoryProxy。

1)使用Ext.data.MemoryProxy,导航信息正确,但是一次显示完了所有数据
Ext如何对本地数据进行分页

2)使用Ext.ux.data.PagingMemoryProxy,导航信息正确,显示pageSize定义的数据量,而非全部显示所有数据

Ext如何对本地数据进行分页
 

Ext如何对本地数据进行分页显示

  源代码如下,ext版本为4.1.1a

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Ext对本地数据进行分页显示</title>
<link rel="stylesheet" type="text/css" href="../../resources/css/ext-all.css" />
<link rel="stylesheet" type="text/css" href="../shared/example.css" />
<script type="text/javascript" src="../../ext-all.js"></script>
<style>
.floatpl{background:url(http://www.coding123.net/logo.jpg)}
</style>
<script type="text/javascript">
Ext.Loader.setConfig({ enabled: true });
Ext.Loader.setPath('Ext.ux', '../ux');
Ext.require([
    'Ext.grid.*',
    'Ext.data.*',
    'Ext.ux.data.PagingMemoryProxy',
    'Ext.form.field.Number',
    'Ext.form.field.Date',
    'Ext.tip.QuickTipManager'
]); 
Ext.define('Task', {
    extend: 'Ext.data.Model',
    idProperty: 'taskId',
    fields: [
        {name: 'projectId', type: 'int'},
        {name: 'project', type: 'string'},
        {name: 'taskId', type: 'int'},
        {name: 'description', type: 'string'},
        {name: 'estimate', type: 'float'},
        {name: 'rate', type: 'float'},
        {name: 'cost', type: 'float'},
        {name: 'due', type: 'date', dateFormat:'m/d/Y'}
    ]
});
 
var data = [
    {projectId: 100, project: 'Ext Forms: Field Anchoring', taskId: 112, description: 'Integrate 2.0 Forms with 2.0 Layouts', estimate: 6, rate: 150, due:'06/24/2007'},
    {projectId: 100, project: 'Ext Forms: Field Anchoring', taskId: 113, description: 'Implement AnchorLayout', estimate: 4, rate: 150, due:'06/25/2007'},
    {projectId: 100, project: 'Ext Forms: Field Anchoring', taskId: 114, description: 'Add support for multiple types of anchors', estimate: 4, rate: 150, due:'06/27/2007'},
    {projectId: 100, project: 'Ext Forms: Field Anchoring', taskId: 115, description: 'Testing and debugging', estimate: 8, rate: 0, due:'06/29/2007'},
    {projectId: 101, project: 'Ext Grid: Single-level Grouping', taskId: 101, description: 'Add required rendering "hooks" to GridView', estimate: 6, rate: 100, due:'07/01/2007'},
    {projectId: 101, project: 'Ext Grid: Single-level Grouping', taskId: 102, description: 'Extend GridView and override rendering functions', estimate: 6, rate: 100, due:'07/03/2007'},
    {projectId: 101, project: 'Ext Grid: Single-level Grouping', taskId: 103, description: 'Extend Store with grouping functionality', estimate: 4, rate: 100, due:'07/04/2007'},
    {projectId: 101, project: 'Ext Grid: Single-level Grouping', taskId: 121, description: 'Default CSS Styling', estimate: 2, rate: 100, due:'07/05/2007'},
    {projectId: 101, project: 'Ext Grid: Single-level Grouping', taskId: 104, description: 'Testing and debugging', estimate: 6, rate: 100, due:'07/06/2007'},
    {projectId: 102, project: 'Ext Grid: Summary Rows', taskId: 105, description: 'Ext Grid plugin integration', estimate: 4, rate: 125, due:'07/01/2007'},
    {projectId: 102, project: 'Ext Grid: Summary Rows', taskId: 106, description: 'Summary creation during rendering phase', estimate: 4, rate: 125, due:'07/02/2007'},
    {projectId: 102, project: 'Ext Grid: Summary Rows', taskId: 107, description: 'Dynamic summary updates in editor grids', estimate: 6, rate: 125, due:'07/05/2007'},
    {projectId: 102, project: 'Ext Grid: Summary Rows', taskId: 108, description: 'Remote summary integration', estimate: 4, rate: 125, due:'07/05/2007'},
    {projectId: 102, project: 'Ext Grid: Summary Rows', taskId: 109, description: 'Summary renderers and calculators', estimate: 4, rate: 125, due:'07/06/2007'},
    {projectId: 102, project: 'Ext Grid: Summary Rows', taskId: 110, description: 'Integrate summaries with GroupingView', estimate: 10, rate: 125, due:'07/11/2007'},
    {projectId: 102, project: 'Ext Grid: Summary Rows', taskId: 111, description: 'Testing and debugging', estimate: 8, rate: 125, due:'07/15/2007'}
];
 
Ext.onReady(function(){
     
    Ext.tip.QuickTipManager.init();
     
    var store = Ext.create('Ext.data.Store', {
        model: 'Task',
        sorters: {property: 'due', direction: 'ASC'},
        groupField: 'project',
        pageSize:10,
        autoLoad:true,
        ///////////////////////////proxy的区别,测试时分别注释其中一种来查看效果
        proxy:new Ext.ux.data.PagingMemoryProxy({ data:data,reader:{type:'json'}})
       // proxy:new Ext.data.MemoryProxy({ data:data,reader:{type:'json'}})
    });
    var cellEditing = Ext.create('Ext.grid.plugin.CellEditing', {
        clicksToEdit: 1
    });
    var showSummary = true;
     var pagingToolbar=new Ext.PagingToolbar({ 
                  store: store,
                  displayInfo: true 
             });
    var grid = Ext.create('Ext.grid.Panel', {
        width: 800,
        height: 350,
        frame: true,
        title: 'Sponsored Projects',
        iconCls: 'icon-grid',
        renderTo: document.body,
        store: store,
        plugins: [cellEditing], 
         bbar: pagingToolbar,
         selType: 'checkboxmodel',
        columns: [
          new Ext.grid.RowNumberer({header:'num',width:30,locked:true}),
        {
            header: 'Task', 
            width:200,
            locked:true, 
            sortable: true,
            dataIndex: 'description', 
        }, {
            header: 'Project',
            width: 180,
            sortable: true, 
            dataIndex: 'project'
        }, {
            header: 'Due Date',
            width: 80,
            sortable: true,
            dataIndex: 'due',
            summaryType: 'max',
            renderer: Ext.util.Format.dateRenderer('m/d/Y'),
            summaryRenderer: Ext.util.Format.dateRenderer('m/d/Y'),
            field: {
                xtype: 'datefield'
            }
        }, {
            header: 'Estimate',
            width: 75,
            sortable: true,
            dataIndex: 'estimate',
            summaryType: 'sum',
            renderer: function(value, metaData, record, rowIdx, colIdx, store, view){
                return value + ' hours';
            },
            summaryRenderer: function(value, summaryData, dataIndex) {
                return value + ' hours';
            },
            field: {
                xtype: 'numberfield'
            }
        }, {
            header: 'Rate',
            width: 75,
            sortable: true,
            renderer: Ext.util.Format.usMoney,
            summaryRenderer: Ext.util.Format.usMoney,
            dataIndex: 'rate',
            summaryType: 'average',
            field: {
                xtype: 'numberfield'
            }
        }, {
            id: 'cost',
            header: 'Cost',
            width: 75,
            sortable: false,
            groupable: false,
            renderer: function(value, metaData, record, rowIdx, colIdx, store, view) {
                return Ext.util.Format.usMoney(record.get('estimate') * record.get('rate'));
            },
            dataIndex: 'cost' 
             
        }]
    });
    
});
</script>
</head>
<body>
 <div id="Div1" style="width:100%;height:200px;overflow:auto"></div>
</body>
</html>

相关文章
Ext5 Ext.data.proxy.Memory客户端数据分页示例


原创文章,转载请注明出处:Ext如何对本地数据进行分页显示
评论(0)Web开发网
阅读(1512)喜欢(0)不喜欢(0)extjs