easyUI在可编辑的datagrid中计算两列的值

@author YHC

在这个教程中你将学习如何包含一个运算的列在可编辑的datagrid中,一个运算列通常包含一些运算值从一个或多个其他列.

查看Demo

首先,创建一个可编辑的datagrid,这就是我们创建的一些可编辑列,'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.

[html]
<table id="tt" 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>

<table id="tt" 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.

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

var lastIndex;
$('#tt').datagrid({
    onClickRow:function(rowIndex){
        if (lastIndex != rowIndex){
            $('#tt').datagrid('endEdit', lastIndex);
            $('#tt').datagrid('beginEdit', rowIndex);
            setEditing(rowIndex);
        }
        lastIndex = rowIndex;
    }
}); 创建运算关系在一些列之间,我们应该得到editors和绑定一些事件到他们上面.

[javascript]
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);
    }
}
作者：yhc13429826359

补充：web前端 , JavaScript ,