datagrid 扩展 页脚 合计功能

时间：2020-12-23 05:24:59

效果图：合计信息展示在页脚中(showFooter:true)

datagrid 扩展 页脚 合计功能

code:

<!DOCTYPE html>

<html>

<head>

    <meta charset="UTF-8">

    <title>javascript test</title>

    <link rel="stylesheet" type="text/css" href="css/metro/easyui.css">

    <link rel="stylesheet" type="text/css" href="css/icon.css">

    <link rel="stylesheet" type="text/css" href="css/demo.css">

    <script type="text/javascript" src="js/jquery.min.js"></script>

    <script type="text/javascript" src="js/jquery.easyui.min.js"></script>

</head>

<body>

  <table id="totalSum"></table>

</body>

  <script type="text/javascript">

     $.extend($.fn.datagrid.methods, {

        statistics: function(jq) {

            var opt = $(jq).datagrid('options').columns;

            var rows = $(jq).datagrid("getRows");

            var footer = new Array();

            footer['sum'] = "";

            for (var i = 0; i < opt[0].length; i++) {

                if (opt[0][i].sum) {

                    footer['sum'] = footer['sum'] + sum(opt[0][i].field, 1) + ',';

                }

            }

            var footerObj = new Array();

            if (footer['sum'] != "") {

                var tmp = '{' + footer['sum'].substring(0, footer['sum'].length - 1) + "}";

                var obj = eval('(' + tmp + ')');

                if (obj[opt[0][0].field] == undefined) {

                    footer['sum'] += '"' + opt[0][0].field + '":"<b>合计:</b>"';//第0列显示为合计

                    obj = eval('({' + footer['sum'] + '})');

                } else {

                    obj[opt[0][0].field] = "<b>合计:</b>" + obj[opt[0][0].field];

                }

                footerObj.push(obj);

            }

            if (footerObj.length > 0) {

                $(jq).datagrid('reloadFooter', footerObj);

            }

            function sum(filed) {

                var sumNum = 0;

                var str = "";

                for (var i = 0; i < rows.length; i++) {

                    var num = rows[i][filed];

                    sumNum += Number(num);

                }

                return '"' + filed + '":"' + sumNum.toFixed(2) + '"';

            }

        }

    });

    $("#totalSum").datagrid({

        width: '50%',

        data:[

          {pro:'北京电信建站一期',amount: 2000,price: 100000},

          {pro:'上海电信建站二期',amount: 1000,price: 50000}

        ],

        showFooter: true,// 页脚要求显示

        fitColumns: true,

        rownumbers: true,

        columns: [[{

            field: 'pro',

            align: 'center',

            title: '项目',

            width: 100,

        },

        {

            field: 'amount',

            sum: true,

            align: 'right',

            title: '数量',

            width: 100,

        },

        {

            field: 'price',

            sum: true,

            align: 'right',

            title: '已付金额',

            width: 100,

        }

        ]],

        onLoadSuccess: function (data) {

            $('#totalSum').datagrid('statistics'); //合计

        },

    })

  </script>

</html>

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