访问表的第 n 列 [英] Access nth column of table

问题描述

我有一个具有以下结构和数据的表

I have a table with the following structure and data

<tr>
<td><input id="c1" type="checkbox"/></td>
<td>342</td>
<td>24</td>
<td>Jeff</td>
</tr>
<tr>
<td><input id="c2" type="checkbox"/></td>
<td>343</td>
<td>29</td>
<td>Libo</td>
</tr>

我想计算所有被检查的行的第三列的总值.所以假设上面的两行都被检查，第三列的值将是 24+29=53

I want to calculate total value of the third column of all rows, which are checked. So assuming both rows above are checked, the value of third column will be 24+29=53

推荐答案

var total = 0;
$("table tr:has(:checkbox:checked) td:nth-child(3)").each(function() {
    total += parseInt($(this).text());
});

见这个fiddle.

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