javascript - 无法从 HTML 获取表值

Question

我想在这里获取此信息:

因为我需要它从数据库(主键)获取数据。但获得这个值是很棘手的。文档准备就绪后，我运行以下 JavaScript 来创建表:

function GetActivityAbstracts() {
    $.getJSON("http://localhost:52535/ExampleService.svc/GetTestTableData", function (testData) {
        var object = $.parseJSON(testData);
        var activityTable = $('#activityTable');

        // create HTML only by using $.map, it's better for perfs to generate all HTML before adding it into the dom
        var html = $.map(object, function (item, index) {
            //index here is used to generate unique ids
            var activityId = item['ActivityId'];
            var activityName = item['ActivityName'];
            var activityResponsible = item['Responsible'];
            var activityEstimatedSavings = parseFloat(item['EstimatedSavings']).toFixed(2);
            var activityEstimatedStart = item['EstimatedStart'];
            var activityEstimatedEnd = item['EstimatedEnd'];
            var activityStatus = item['Status'];
            // TODO: Make more user-friendly Status Descriptions instead of C# enum values.
            // move id  attr on on <tr> 
            return '<tr id="activityId_' + index + '">' +
                    '<td data-id="' + activityId + 
                    '" style = "vertical-align: middle; align: center;">'
                    + activityId + '</td>' +
                    '<td style = "vertical-align: middle;">' +
                    '<div class="status-circle" data-toggle="tooltip" data-placement="right"' +
                    'title=" ' + activityStatus + '" style="background-color:' +
                    GetColumnColor(activityStatus) + ';"></div></td>' +
                    '<td id = "activityName_' + index + '" style = "vertical-align: middle;">'
                    + activityName + '</td>' +
                    //Add index for ids here
                    '<td style = "vertical-align: middle;">'
                    + activityResponsible + '</td>' +
                    '<td style = "vertical-align: middle;">'
                    + activityEstimatedSavings + '</td>' +
                    '<td style = "vertical-align: middle;">'
                    + activityEstimatedStart + '</td>' +
                    '<td style = "vertical-align: middle;">'
                    + activityEstimatedEnd + '</td>' +
                    '</tr>';

        });
        // Add HTML into activityTable
        activityTable.html(html);
        // Add event by using delegate event.
        debugger
        AddActivityAbstractOnClickEvent();
        $('#current-data-table').append(activityTable);

        /* This call is necessary because the table is added dynamically */
        $('[data-toggle="tooltip"]').tooltip();
    });
}

然后我运行这个:

function AddActivityAbstractOnClickEvent() {
    $('#activityTable').on('click', 'tr', function () {
        var id = $(this).find('td').find('data-id').children();
        GetActivityFullDescription(id);
    });
}

function GetActivityFullDescription(id) {
    alert(id);
}

作为一个简单的测试，以确保我获得了正确的 ID。但这样做并不能让我获得 ID，而且我还觉得我做得太复杂了._.

运行上面的代码，我在调试器中看到下面的这个值。但我无法访问它，这可能是因为我一开始就做错了。

我试图绕过我使用的这种选择方法，是将“data-id”添加到 <td>元素，然后访问它，但这并没有真正起作用......有什么想法吗？

Answer 1

如果需要获取第一个td，可以使用

 $('#activityTable').on('click', 'tr', function () {
        var id = $(this).find('td:first').data('id');
        GetActivityFullDescription(id);
    });