Question

好的，我在页面上有多个表单，区别在于他们的id，每个表单都有一个父框，所有这些框都有不同的id。

其中一个框的html：

<div class="center-block" id="box2">
    <form action="/login" id="form2" method="post" novalidate="novalidate">
        <input data-val="true" data-val-number="The field Id must be a number." data-val-required="The Id field is required." id="Id" name="Id" type="hidden" value="2">
        <input id="Name" name="Name" type="hidden">
        <input type="submit" value="Submit">
    </form>
</div>

我使用ajax提交表单，我想要做的是找到提交表单的框的id。

这是剧本：

<script type="text/javascript">
    $(document).ready(function() {
        $('form').submit(function () {

            $.ajax({
                url: $(this).data('url'),
                type: 'POST',
                data: $(this).serialize(),
                success: function (data) {
                    if (data !== "0") {
                        window.location.href = data;
                    } else {
                        //Here I would like to alert the id of the parent box.
                        //Something like this:
                        alert($(this).closest('div').attr('id'));
                        //Which returns undefined                        

                    }
                },
                error: function () {
                    alert("No idea what went wrong");
                }
            });
            return false;
        });
    });

</script>

知道我该怎么做吗？

Answer 1

$(this)无法成功回调。 $(this)是相对的，<script type="text/javascript"> $(document).ready(function() { $('form').submit(function () { var curr_form = $(this); $.ajax({ url: $(this).data('url'), type: 'POST', data: $(this).serialize(), success: function (data) { if (data !== "0") { window.location.href = data; } else { //Here I would like to alert the id of the parent box. //Something like this: curr_form.closest('div').attr('id') //Which returns undefined } }, error: function () { alert("No idea what went wrong"); } }); return false; }); }); </script>的范围将成功回调。你需要先分配一个变量＆amp;然后在成功回调中使用它

public class settings_tab extends Fragment {

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

        //Returning the layout file after inflating
        //Change R.layout.tab1 in you classes
        Intent intent = new Intent(getActivity(), MainActivity.class);
        startActivity(intent);

        return inflater.inflate(R.layout.activity_settings_tab, container, false);
    }
}

Answer 2

只需使用JQuery parent() 方法：

alert($(this).parent().attr('id'));

此外，正如其他人所指出的，当您在成功回调中使用this时form没有指向this时，您会遇到另外一个问题。您应该缓存该值，然后使用缓存变量。您可以详细了解$(document).ready(function() { $('form').submit(function () { // Cache the object that "this" is bound to because // in the success function, the invocation context // changes and "this" won't point to the same object // it does now. var theForm = this; $.ajax({ url: $(this).data('url'), type: 'POST', data: $(this).serialize(), success: function (data) { if (data !== "0") { window.location.href = data; } else { //Just use the JQuery parent() method with the cached object $(theForm).parent().attr('id') } }, error: function () { alert("No idea what went wrong"); } }); return false; }); });在我的 in another post 的JavaScript中的工作原理。

user> (defn dissoc-by [f m] (->> m (filter #(f (first %))) (into {})))
#'user/dissoc-by
user> (dissoc-by #(.contains % "good") m)
{"good1" 1, "good2" 2}

从点击表单提交中获取父div的ID

2 个答案: