jQuery EasyUI 数据网格 – 列运算

在本教程中,您将学习如何在可编辑的数据网格(datagrid)中包含一个运算的列。一个运算列通常包含一些从一个或多个其他列运算的值。

首先,创建一个可编辑的数据网格(datagrid)。这里我们创建了一些可编辑列,\’listprice\’、\’amount\’ 和 \’unitcost\’ 列定义为 numberbox 编辑类型。运算列是 \’unitcost\’ 字段,将是 listprice 乘以 amount 列的结果。

    <table style=\"width:600px;height:auto\"
            title=\"Editable DataGrid with Calculated Column\" iconCls=\"icon-edit\" singleSelect=\"true\"
            idField=\"itemid\" url=\"data/datagrid_data.json\">
        <thead>
            <tr>
                <th field=\"itemid\" width=\"80\">Item ID</th>
                <th field=\"listprice\" width=\"80\" align=\"right\" editor=\"{type:\'numberbox\',options:{precision:1}}\">List Price</th>
                <th field=\"amount\" width=\"80\" align=\"right\" editor=\"{type:\'numberbox\',options:{precision:0}}\">Amount</th>
                <th field=\"unitcost\" width=\"80\" align=\"right\" editor=\"numberbox\">Unit Cost</th>
                <th field=\"attr1\" width=\"150\" editor=\"text\">Attribute</th>
                <th field=\"status\" width=\"60\" align=\"center\" editor=\"{type:\'checkbox\',options:{on:\'P\',off:\'\'}}\">Status</th>
            </tr>
        </thead>
    </table>

当用户点击一行的时候,我们开始一个编辑动作。

    var lastIndex;
    $(\'#tt\').datagrid({
        onClickRow:function(rowIndex){
            if (lastIndex != rowIndex){
                $(\'#tt\').datagrid(\'endEdit\', lastIndex);
                $(\'#tt\').datagrid(\'beginEdit\', rowIndex);
                setEditing(rowIndex);
            }
            lastIndex = rowIndex;
        }
    });

为了在一些列之间创建运算关系,我们应该得到当前的 editors,并绑定一些事件到它们上面。

    function setEditing(rowIndex){
        var editors = $(\'#tt\').datagrid(\'getEditors\', rowIndex);
        var priceEditor = editors[0];
        var amountEditor = editors[1];
        var costEditor = editors[2];
        priceEditor.target.bind(\'change\', function(){
            calculate();
        });
        amountEditor.target.bind(\'change\', function(){
            calculate();
        });
        function calculate(){
            var cost = priceEditor.target.val() * amountEditor.target.val();
            $(costEditor.target).numberbox(\'setValue\',cost);
        }
    }

下载 jQuery EasyUI 实例

jeasyui-datagrid-datagrid15.zip