easyui datagrid 前台分页的实现

JavaScript 前端客 8154℃ 0评论

使用easyui分页,有后台服务器端实现和前台浏览器端实现两种方式。服务器端实现按规定的格式返回数据即可,前台实现需要写js来实现。
查阅资料后,提供以下实现方式:

关键代码:

function pagerFilter(data){
            if (typeof data.length == 'number' && typeof data.splice == 'function'){    // 判断数据是否是数组
                data = {
                    total: data.length,
                    rows: data
                }
            }
            var dg = $(this);
            var opts = dg.datagrid('options');
            var pager = dg.datagrid('getPager');
            pager.pagination({
                onSelectPage:function(pageNum, pageSize){
                    opts.pageNumber = pageNum;
                    opts.pageSize = pageSize;
                    pager.pagination('refresh',{
                        pageNumber:pageNum,
                        pageSize:pageSize
                    });
                    dg.datagrid('loadData',data);
                }
            });
            if (!data.originalRows){
                data.originalRows = (data.rows);
            }
            var start = (opts.pageNumber-1)*parseInt(opts.pageSize);
            var end = start + parseInt(opts.pageSize);
            data.rows = (data.originalRows.slice(start, end));
            return data;
        }

完整的Demo

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>客户端分页demo</title>
    <link rel="stylesheet" type="text/css" href="http://www.jeasyui.com/easyui/themes/bootstrap/easyui.css">
    <link rel="stylesheet" type="text/css" href="http://www.jeasyui.com/easyui/themes/icon.css">
    <link rel="stylesheet" type="text/css" href="http://www.jeasyui.com/easyui/demo/demo.css">
    <script type="text/javascript" src="http://www.jeasyui.com/easyui/jquery-1.8.0.min.js"></script>
    <script type="text/javascript" src="http://www.jeasyui.com/easyui/jquery.easyui.min.js"></script>
</head>
<body>
    <h2>客户端分页dem</h2>
    <div class="demo-info">
        <div class="demo-tip icon-tip"></div>
        <div></div>
    </div>
    <div style="margin:10px 0;"></div>

    <table id="dg" title="Client Side Pagination" style="width:700px;height:300px" data-options="
                rownumbers:true,
                singleSelect:true,
                autoRowHeight:false,
                pagination:true,
                pageSize:10">
        <thead>
            <tr>
                <th field="inv" width="80">Inv No</th>
                <th field="date" width="100">Date</th>
                <th field="name" width="80">Name</th>
                <th field="amount" width="80" align="right">Amount</th>
                <th field="price" width="80" align="right">Price</th>
                <th field="cost" width="100" align="right">Cost</th>
                <th field="note" width="110">Note</th>
            </tr>
        </thead>
    </table>
    <script>

        function getData(){//模拟数据
            var rows = [];
            for(var i=1; i<=80000; i++){
                var amount = Math.floor(Math.random()*1000);
                var price = Math.floor(Math.random()*1000);
                rows.push({
                    inv: 'Inv No '+i,
                    date: $.fn.datebox.defaults.formatter(new Date()),
                    name: 'Name '+i,
                    amount: amount,
                    price: price,
                    cost: amount*price,
                    note: 'Note '+i
                });
            }
			//console.log(JSON.stringify(rows));
            return rows;

        }

        function pagerFilter(data){
            if (typeof data.length == 'number' && typeof data.splice == 'function'){    // 判断数据是否是数组
                data = {
                    total: data.length,
                    rows: data
                }
            }
            var dg = $(this);
            var opts = dg.datagrid('options');
            var pager = dg.datagrid('getPager');
            pager.pagination({
                onSelectPage:function(pageNum, pageSize){
                    opts.pageNumber = pageNum;
                    opts.pageSize = pageSize;
                    pager.pagination('refresh',{
                        pageNumber:pageNum,
                        pageSize:pageSize
                    });
                    dg.datagrid('loadData',data);
                }
            });
            if (!data.originalRows){
                data.originalRows = (data.rows);
            }
            var start = (opts.pageNumber-1)*parseInt(opts.pageSize);
            var end = start + parseInt(opts.pageSize);
            data.rows = (data.originalRows.slice(start, end));
            return data;
        }

        $(function(){//加载数据
            $('#dg').datagrid({loadFilter:pagerFilter}).datagrid('loadData', getData());
        });
    </script>
</body>
</html>
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