Question

以下代码无效。我需要在jsfiddle上看到所有列的总和。出了什么问题？

HTML

<table id="sum_table" width="300" border="1">
    <tr>
        <td>Apple</td>
        <td>Orange</td>
        <td>Watermelon</td>
    </tr>
    <tr>
        <td class="rowDataSd">1</td>
        <td class="rowDataSd">2</td>
        <td class="rowDataSd">3</td>
    </tr>
    <tr>
        <td class="rowDataSd">1</td>
        <td class="rowDataSd">2</td>
        <td class="rowDataSd">3</td>
    </tr>
    <tr>
        <td class="rowDataSd">1</td>
        <td class="rowDataSd">2</td>
        <td class="rowDataSd">3</td>
    </tr>
    <tr class="totalColumn">
        <td class="totalCol">Total:</td>
        <td class="totalCol">Total:</td>
        <td class="totalCol">Total:</td>
    </tr>
</table>

的Javascript

$(document).ready(function(){


   $(".rowDataSd").each(function() {
      newSum.call(this);
    });

});


function newSum() {
    var $table = $(this).closest('table');
    var total = 0;

    $(this).attr('class').match(/(\d+)/)[1];

$table.find('tr:not(.totalColumn) .rowDataSd').each(function()  {
        total += parseInt($(this).html());

});

$table.find('.totalColumn td:nth-child('')').html(total);
}

Answer 1

这是jsffile。希望这有帮助

  <table id="sum_table" width="300" border="1">
        <tr class="titlerow">
            <td>Apple</td>
            <td>Orange</td>
            <td>Watermelon</td>
        </tr>
        <tr>
            <td class="rowDataSd">1</td>
            <td class="rowDataSd">2</td>
            <td class="rowDataSd">3</td>
        </tr>
        <tr>
            <td class="rowDataSd">1</td>
            <td class="rowDataSd">2</td>
            <td class="rowDataSd">3</td>
        </tr>
        <tr>
            <td class="rowDataSd">1</td>
            <td class="rowDataSd">5</td>
            <td class="rowDataSd">3</td>
        </tr>
        <tr class="totalColumn">
            <td class="totalCol">Total:</td>
            <td class="totalCol">Total:</td>
            <td class="totalCol">Total:</td>
        </tr>
    </table> 
<script>
       var totals=[0,0,0];
        $(document).ready(function(){

            var $dataRows=$("#sum_table tr:not('.totalColumn, .titlerow')");

            $dataRows.each(function() {
                $(this).find('.rowDataSd').each(function(i){        
                    totals[i]+=parseInt( $(this).html());
                });
            });
            $("#sum_table td.totalCol").each(function(i){  
                $(this).html("total:"+totals[i]);
            });

        });
</script>

Answer 2

jsFiddle with example

为实现这一目标，我们可以充分利用thead元素中的tfoot和table标记。稍作修改，我们有以下内容：

HTML

<table id="sum_table" width="300" border="1">
    <thead>                
        <tr>
            <th>Apple</th>
            <th>Orange</th>
            <th>Watermelon</th>
        </tr>
    </thead>
    <tr>
        <td>1</td>
        <td>2</td>
        <td>3</td>
    </tr>
    <tr>
        <td>1</td>
        <td>2</td>
        <td>3</td>
    </tr>
    <tr>
        <td>1</td>
        <td>2</td>
        <td>3</td>
    </tr>
    <tfoot>
        <tr>
            <td>Total:</td>
            <td>Total:</td>
            <td>Total:</td>
        </tr>
    </tfoot>
</table>

然后，我们可以更具体地定位我们想要的元素，即有多少列，以及“总”单元格。

的JavaScript

$(document).ready(function()
{
    $('table thead th').each(function(i)
    {
        calculateColumn(i);
    });
});

function calculateColumn(index)
{
    var total = 0;
    $('table tr').each(function()
    {
        var value = parseInt($('td', this).eq(index).text());
        if (!isNaN(value))
        {
            total += value;
        }
    });

    $('table tfoot td').eq(index).text('Total: ' + total);
}

Answer 3

$('#sum_table tr:first td').each(function(){
   var $td = $(this); 

    var colTotal = 0;
    $('#sum_table tr:not(:first,.totalColumn)').each(function(){
        colTotal  += parseInt($(this).children().eq($td.index()).html(),10);
    });

    $('#sum_table tr.totalColumn').children().eq($td.index()).html('Total: ' + colTotal);
});

实例：http://jsfiddle.net/unKDk/7/

Answer 4

另一种方式：

$(document).ready(function(){   
    for (i=0;i<$('#sum_table tr:eq(0) td').length;i++) {
       var total = 0;
        $('td.rowDataSd:eq(' + i + ')', 'tr').each(function(i) {
           total = total + parseInt($(this).text());
        });            
        $('#sum_table tr:last td').eq(i).text(total);
    }

});

示例：http://jsfiddle.net/lucuma/unKDk/10/

Answer 5

只需稍微调整一下桌子上的课程即可轻松完成：

HTML：

<table id="sum_table" width="300" border="1">
    <tr>
        <td>Apple</td>
        <td>Orange</td>
        <td>Watermelon</td>
    </tr>
    <tr>
        <td class="col1">1</td>
        <td class="col2">2</td>
        <td class="col3">3</td>
    </tr>
    <tr>
        <td class="col1">1</td>
        <td class="col2">2</td>
        <td class="col3">3</td>
    </tr>
    <tr>
        <td class="col1">1</td>
        <td class="col2">2</td>
        <td class="col3">3</td>
    </tr>
    <tr>
        <td class="total">Total:</td>
        <td class="total">Total:</td>
        <td class="total">Total:</td>
    </tr>
</table>

JS：

var getSum = function (colNumber) {
    var sum = 0;
    var selector = '.col' + colNumber;

    $('#sum_table').find(selector).each(function (index, element) {
        sum += parseInt($(element).text());
    });  

    return sum;        
};

$('#sum_table').find('.total').each(function (index, element) {
    $(this).text('Total: ' + getSum(index + 1)); 
});

http://jsfiddle.net/unKDk/9/

Answer 6

我知道现在已经很好地回答了这个问题，但是在我得到所有答案之前我开始研究这个解决方案，并希望继续发布它。

此解决方案适用于您发布的HTML，并假设有以下内容：1）第一行是标题行，2）最后一行是总行，3）每行有相等的列，以及4）列包含整数。在这种情况下，只需要识别表格。

$(document).ready(function(){
    totalRows("#sum_table");
});

function totalRows(tableSelector) {
    var table = $(tableSelector);
    var rows = table.find("tr");
    var val, totals = [];

    //loop through the rows getting values in the rowDataSd columns
    rows
        .each(function(rIndex) {
            if (rIndex > 0 && rIndex < (rows.length-1)) { //not first or last row
                //loop through the columns
                $(this).find("td").each(function(cIndex) {
                    val = parseInt($(this).html());
                    (totals.length>cIndex) ? totals[cIndex]+=val : totals.push(val);
                });
            }
        })
        .last().find("td").each(function(index) {
            val = (totals.length>index) ? totals[index] : 0;
            $(this).html( "Total: " + val );
        });
}

Answer 7

先生，先生你好！ http://jsfiddle.net/47VDK/

jQuery中列的总和

HTML

7 个答案:

jsFiddle with example

HTML

的JavaScript