javascript 通过单击表格行获取字段 (td) 值
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/17979931/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Obtain field (td) values by clicking on table row
提问by John Smith
I need your help.
我需要你的帮助。
I have the following table as detailed below. What I would like to do is to click on one of the rows in the table (headers excluded) and obtain the column values of the selected row.
我有下表，详细如下。我想要做的是单击表中的行之一（不包括标题）并获取所选行的列值。
How do I populate the textboxes with the information from the selected row in the table?
如何使用表中选定行的信息填充文本框？
No libraries please.
请不要图书馆。
<!DOCTYPE html>
<html>
<head>
</head>
<body>
<table id="myTable" cellspacing="1">
<thead>>
<tr>
<th>first name</th>
<th>last name</th>
<th>age</th>
<th>total</th>
<th>discount</th>
<th>diff</th>
</tr>
</thead>
<tbody>
<tr>
<td>peter</td>
<td>parker</td>
<td>28</td>
<td>9.99</td>
<td>20.3%</td>
<td>+3</td>
</tr>
<tr>
<td>john</td>
<td>hood</td>
<td>33</td>
<td>19.99</td>
<td>25.1%</td>
<td>-7</td>
</tr>
<tr>
<td>clark</td>
<td>kent</td>
<td>18</td>
<td>15.89</td>
<td>44.2%</td>
<td>-15</td>
</tr>
<tr>
<td>bruce</td>
<td>almighty</td>
<td>45</td>
<td>153.19</td>
<td>44%</td>
<td>+19</td>
</tr>
<tr>
<td>bruce</td>
<td>evans</td>
<td>56</td>
<td>153.19</td>
<td>23%</td>
<td>+9</td>
</tr>
</tbody>
</table>
Firstname is:<input type="text" id="firstname" />
<br>
Lastname is:<input type="text" id="lastname" />
<br>
Age is:<input type="text" id="age" />
<br>
Total is:<input type="text" id="total" />
<br>
Discount is:<input type="text" id="discount" />
<br>
Diff is:<input type="text" id="diff" />
</body>
</html>
回答by Stano
Here is one example how to use event delegationin javascript (it's especially convenient for dynamically added content) . The event handler is attached to TABLE element's onclick attribute:
下面是一个如何在 javascript 中使用事件委托的示例（它对于动态添加的内容特别方便）。事件处理程序附加到 TABLE 元素的 onclick 属性：
function run(){
document.getElementById('myTable').onclick = function(event){
event = event || window.event; //for IE8 backward compatibility
var target = event.target || event.srcElement; //for IE8 backward compatibility
while (target && target.nodeName != 'TR') {
target = target.parentElement;
}
var cells = target.cells; //cells collection
//var cells = target.getElementsByTagName('td'); //alternative
if (!cells.length || target.parentNode.nodeName == 'THEAD') { // if clicked row is within thead
return;
}
var f1 = document.getElementById('firstname');
var f2 = document.getElementById('lastname');
var f3 = document.getElementById('age');
var f4 = document.getElementById('total');
var f5 = document.getElementById('discount');
var f6 = document.getElementById('diff');
f1.value = cells[0].innerHTML;
f2.value = cells[1].innerHTML;
f3.value = cells[2].innerHTML;
f4.value = cells[3].innerHTML;
f5.value = cells[4].innerHTML;
f6.value = cells[5].innerHTML;
}
}
JSFIDDLE: code/ result page
The alternative solution, where the event handler is directly attached to each TR element can look like this:
将事件处理程序直接附加到每个 TR 元素的替代解决方案可能如下所示：
function run() {
var t = document.getElementById('myTable');
var rows = t.rows; //rows collection - https://developer.mozilla.org/en-US/docs/Web/API/HTMLTableElement
for (var i=0; i<rows.length; i++) {
rows[i].onclick = function () {
if (this.parentNode.nodeName == 'THEAD') {
return;
}
var cells = this.cells; //cells collection
var f1 = document.getElementById('firstname');
var f2 = document.getElementById('lastname');
var f3 = document.getElementById('age');
var f4 = document.getElementById('total');
var f5 = document.getElementById('discount');
var f6 = document.getElementById('diff');
f1.value = cells[0].innerHTML;
f2.value = cells[1].innerHTML;
f3.value = cells[2].innerHTML;
f4.value = cells[3].innerHTML;
f5.value = cells[4].innerHTML;
f6.value = cells[5].innerHTML;
};
}
}
JSFIDDLE: code/ result page
回答by Avitus
With using just plain javascript you can do this:
只使用普通的 javascript 你可以做到这一点：
<html>
<head>
<script language="javascript" type="text/javascript">
function showRow(row)
{
var x=row.cells;
document.getElementById("firstname").value = x[0].innerHTML;
document.getElementById("lastname").value = x[1].innerHTML;
document.getElementById("age").value = x[2].innerHTML;
document.getElementById("total").value = x[3].innerHTML;
document.getElementById("discount").value = x[4].innerHTML;
document.getElementById("diff").value = x[5].innerHTML;
}
</script>
</head>
<body>
<table id="myTable" cellspacing="1">
<thead>
<tr>
<th>first name</th>
<th>last name</th>
<th>age</th>
<th>total</th>
<th>discount</th>
<th>diff</th>
</tr>
</thead>
<tbody>
<tr onclick="javascript:showRow(this);">
<td>peter</td>
<td>parker</td>
<td>28</td>
<td>9.99</td>
<td>20.3%</td>
<td>+3</td>
</tr>
<tr onclick="javascript:showRow(this);">
<td>john</td>
<td>hood</td>
<td>33</td>
<td>19.99</td>
<td>25.1%</td>
<td>-7</td>
</tr>
<tr onclick="javascript:showRow(this);">
<td>clark</td>
<td>kent</td>
<td>18</td>
<td>15.89</td>
<td>44.2%</td>
<td>-15</td>
</tr>
<tr onclick="javascript:showRow(this);">
<td>bruce</td>
<td>almighty</td>
<td>45</td>
<td>153.19</td>
<td>44%</td>
<td>+19</td>
</tr>
<tr onclick="javascript:showRow(this);">
<td>bruce</td>
<td>evans</td>
<td>56</td>
<td>153.19</td>
<td>23%</td>
<td>+9</td>
</tr>
</tbody>
</table>
Firstname is:<input type="text" id="firstname" />
<br>
Lastname is:<input type="text" id="lastname" />
<br>
Age is:<input type="text" id="age" />
<br>
Total is:<input type="text" id="total" />
<br>
Discount is:<input type="text" id="discount" />
<br>
Diff is:<input type="text" id="diff" />
</body>
</html>
回答by oleq
Try this (see the fiddle):
试试这个（见小提琴）：
var table = document.getElementById( 'myTable' ),
inputHash = {
'0': 'firstname',
'1': 'lastname',
'2': 'age',
'3': 'total',
'4': 'discount',
'5': 'diff'
};
for ( var i in inputHash )
inputHash[ i ] = document.getElementById( inputHash[ i ] );
table.addEventListener( 'click', function( evt ) {
var target = evt.target;
if ( target.nodeName != 'TD' )
return;
var columns = target.parentNode.getElementsByTagName( 'td' );
for ( var i = columns.length; i-- ; )
inputHash[ i ].value = columns[ i ].innerHTML;
} );
回答by Adam MacDonald
Place an onclick on each of your trs like this:
像这样在每个 trs 上放置一个 onclick：
onclick="fillme(this)"
and then place this script in your head
然后把这个脚本放在你的脑海里
<script>
function fillme(o){
var inputs=document.getElementsByTagName('input');
var tds=o.getElementsByTagName('td');
for(a in tds){
inputs[a].value=tds[a].innerHTML;
}
}
</script>
