查找某个单元格或td的colSpan标头是Spans [英] Finding a colSpan Header for one of the cells or td's is Spans

问题描述

我有跨多个列的多个列标题，我想找到这些列的正确标题编号/计数.

I have multiple column headers that spans of multiple column and I would like to find the correct header number/count for the columns.

我想输入一个列号并获取标题:示例第5列是RDataTest6 $('td.eq(5))，其标题是HTest3 $('th.eq(2))

I want to enter a column number and get the header: example column 5 is RDataTest6 $('td.eq(5)) and its header is HTest3 $('th.eq(2))

示例:

<table>
    <tr>
        <th>HTest1</th>
        <th colSpan="2">HTest2</th>
        <th colSpan="4">HTest3</th>
        <th colSpan="2">HTest4</th>         
    </tr>
    <tr>
        <td>RDataTest1</td>
        <td>RDataTest2</td>
        <td>RDataTest3</td>
        <td>RDataTest4</td>
        <td>RDataTest5</td>
        <td>RDataTest6</td>
        <td>RDataTest7</td>
        <td>RDataTest8</td>
        <td>RDataTest9</td>
    </tr>
</table>

推荐答案

您应该实现一个保存标头位置的简单数组，见下文，

You should implement a simple array that hold the header location, see below,

var thLocator = [], colCount = 1;
$table.find('tr:first th').each(function () {
    for (var i = 0; i < this.colSpan; i++) {
        thLocator.push(colCount);
    }
    colCount++;
});

$table.find('td').click(function () {
    alert(thLocator[$(this).index()]);
});

然后您可以随时获取td列的位置.请参见 DEMO ->单击任何TD以确定其col头位置.

And then anytime You can get the location of a td column. See DEMO -> Click on any TD to identify its col head position.

我不确定您要哪个计数，所以我记下了所有列数.参见 演示

I am not sure which count you want so I wrote down all col count. See DEMO

$(function() {
    var $table = $('table');

    alert('Table Header Count ' + $table.find('tr:first th').length);

    var thCount = 0;
    $table.find('tr:first th').each(function () {
        thCount += this.colSpan;
    });

    alert('Computed TH Count ' + thCount );

    alert('Table TD Col Count ' + $table.find('tr:eq(1) td').length);
});

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