如何使用jquery选择表中行的值？

I want to get the value of a row in a table with jquery, when the user click on it.

当用户点击它时,我想用jquery获取表中一行的值。

I have tried this solution, but it doesn't work correctly:

我试过这个解决方案,但它无法正常工作:

$(document).ready(function() {


                $.post("./php/myjson.php", function(data, status) {
                    obj = JSON.parse(data);
                    var trHTML = '';
                    for (var i = 0; i < obj.giocatori.length; i++) {

                        trHTML += '<tr><td><img src="../media/image/squadre/' + obj.giocatori[i].Squadra.toLowerCase() + '.png"/></td><td>'+obj.giocatori[i].Giocatore+'</td><td>' + obj.giocatori[i].Cognome + '</td><td>' + obj.giocatori[i].Prezzo + '</td></tr>';
                    }
                    trHTML+='</tbody>';
                    $('#records_table').append(trHTML);

                });
                $( "#records_table tr" ).on( "click", function(  ) {
                      alert( $(this).find('td:nth-child(2)').html());
                });

            });

table tbody tr:hover {
    background-color: orange;
    cursor: pointer;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<table id="records_table" border="1">

        <tbody>
            <tr>
                <th>Squadra</th>
                <th>ID</th>
                <th>Cognome</th>
                <th>Prezzo</th>

            </tr>

    </table>

Where is the error ?

错误在哪里?

2 个解决方案

#1

Even though the table exists when the page loads, its contents are loaded after the page loads (after DOM ready event). You want to use a delegated event. Therefore, try this:

即使页面加载时表存在,其内容也会在页面加载后加载(在DOM ready事件之后)。您想使用委派的事件。因此,试试这个:

$( "#records_table" ).on( "click", "tr", function(  ) {
    alert( $('td', this).eq(2).html() );
});

NOTE: Adding this section -- your version -- in the success call back of the the ajax call after the new content is added should also work.

注意:在添加新内容后,在ajax调用的成功回调中添加此部分 - 您的版本也应该有效。

#2

You are keeping tbody in HTML, but adding the content to table. Please change the following.

您将tbody保留在HTML中,但将内容添加到表中。请更改以下内容。

$(document).ready(function() {

            $.post("./php/myjson.php", function(data, status) {
                obj = JSON.parse(data);
                var trHTML = '';
                for (var i = 0; i < obj.giocatori.length; i++) {

                    trHTML += '<tr><td><img src="../media/image/squadre/' + obj.giocatori[i].Squadra.toLowerCase() + '.png"/></td><td>'+obj.giocatori[i].Giocatore+'</td><td>' + obj.giocatori[i].Cognome + '</td><td>' + obj.giocatori[i].Prezzo + '</td></tr>';
                }
                $('#records_table tbody').append(trHTML);

            });
            $( "#records_table tr" ).on( "click", function(  ) {
                  alert( $(this).find('td:nth-child(2)').html());
            });

        });

as well as you can close the tbody in HTML.

以及你可以用HTML关闭tbody。

Squadra ID Cognome Prezzo

#1