Question

只想在表格中隐藏整个空列。

表的代码如下：

   <table width="100%" border="1" cellspacing="2" cellpadding="2" id="weatherTable">

 <tr>
<th align="center" valign="bottom" bgcolor="#CCCCCC"><strong>DISPLAYED REPORTS AVERAGES:</strong></th>
<td align="center" valign=bottom><font size="4"><b><strong>--</strong></b></font></td>
<td align="center" valign=bottom><font size="4"><b><?php echo $row["air_temp"]; ?></b></font></td>
<td align="center" valign=bottom><font size="4"><?php echo $row["sea_temp"]; ?></font></td>
</tr>

 <tr>
<th align="center" valign="bottom" bgcolor="#CCCCCC"><strong>Station (ID)</strong></td>
<th align="center" valign="bottom" bgcolor="#CCCCCC"><strong>Time<br>(UTC)</strong></td>
<th align="center" valign="bottom" bgcolor="#CCCCCC"><strong>Air Temp<br>(&deg;C)</strong></td>
<th align="center" valign="bottom" bgcolor="#CCCCCC"><strong>Sea Temp<br>(&deg;C)</strong></td>
 </tr>

 <tr>

 if (($sth-> rowCount())>0) {

foreach (($sth->fetchAll(PDO::FETCH_ASSOC)) as $col) {
?>

<tr>
<td align="right" valign=top><?php echo $col["name"] . " (" . $col["dim_stationID"] . ")"; ?></td>
<td align="center" valign=top><?php $d = $col["date_time"]; $t = explode(" ",$d); $s = explode (":",$t[1]); echo "".$s[0]."".$s[1].""; ?> </td>
<td align="center" valign=top><?php echo $col["air_temp"]; ?></td>
<td align="center" valign=top><?php echo $col["sea_temp"]; ?></td>
</tr>

每行每个报告中填入4列id的数据，并且我在每个列的表格顶部设置了平均值，所以现在最后一列“Sea Temp”是空的，我怎么能隐藏整个列？

PS：我正在编码

 $('td:empty').each(function(i){
 $(this).hide().parents('weatherTable').find('th:nth-child('+(i+1)+')').hide();
 });

但是该代码是隐藏每个空字段（不想要），例如“Air Temp”列下有不同报表的三行，并且该列中有一行包含数据，另外两行是空。从逻辑上讲，由于整列不为空，因此不应隐藏此列。

Answer 1

正如Hiding a table column if the containing cells are empty with jQuery（由maclema回答）所回答，你可以使用这样的东西：

var numCols = $("th", table).length;
for ( var i=1; i<=numCols; i++ ) {
    var empty = true;
    //grab all the <td>'s of the column at i
    $("td:nth-child(" + i + ")", table).each(function(index) {
        //check if the td is not empty
        if ( $(this).text() != "" ) {
            empty = false;
            return false; //break out of each() early
        }
    });
    if ( empty ) {
        $("td:nth-child(" + i + ")", table).hide(); //hide <td>'s
        $("th:nth-child(" + i + ")", table).hide(); //hide header <th>
    }
}

Answer 2

试试这个，你就完成了

function hideEmptyCols(table) {
    var rows = $("tr", table).length-1;
    var numCols = $("th", table).length;
    for ( var i=1; i<=numCols; i++ ) {
        if ( $("span:empty", $("td:nth-child(" + i + ")", table)).length == rows ) {
            $("td:nth-child(" + i + ")", table).hide();
            $("th:nth-child(" + i + ")", table).hide();        }
    }
}

如何在php / html中隐藏整个空列

2 个答案: