AJAX request isn't recognized as such

问题

I have a list of items which can be searched and the page has pagination. When a search query is entered the partial view gets loaded correctly (AJAX). However, when you use the pagination, it fires a non-ajax request (entire page gets reloaded and no XmlHttpRequest flag in the header).

What causes this?

$(function () {
 // Adds Ajax to pagination of search results
    var getPage = function () {
        var $a = $(this);

        var options = {
            url: $a.attr("href"),
            type: "get",
            data: $("form").serialize() 
        };

        $.ajax(options).done(function (data) {
            var $target = $a.parents("div.pagedlist").attr("data-nn-target");
            var $newHtml = $(data);
            $target.html($newHtml);
            $newHtml.effect("highlight");
        });

        // Prevent default action
        return false;
    };

    $(".main-content").on("click", ".pagedlist a", getPage);
 });

<form method="GET" action='@Url.Action("Index", "Show")' data-nn-ajax="true" data-nn-target="#contentlist" class="form-search">
    <div class="input-append mysearch">
        <input type="search" class="span5 search-query" name="query" data-nn-autocomplete="@Url.Action("AutoComplete")" />
        <input type="submit" class="btn" value="Search" />
    </div>
</form>

<div id="contentlist">
    <table></table> // content
    <div class="pagedlist" data-nn-target="#contentlist">
        @Html.PagedListPager(Model, page => Url.Action("Index", new { page }), PagedListRenderOptions.MinimalWithItemCountText)
    </div>
</div>

According to the tutorial, this line of code should've solved the issue where you can't use the pagination for a resultset.

data: $("form").serialize()

 public ActionResult Index(string query = "", int page = 1) {
        IPagedList<ShowViewModel> model;

        if (Request.IsAjaxRequest()) {
            model = ViewModelFactory.Instance.CreateShowViewModels(_showRepository.GetShows()
                                                                                       .Where(
                                                                                           x =>
                                                                                           x.Title.ToLower()
                                                                                            .Contains(
                                                                                                query.ToLower())))
                                         .OrderByDescending(x => x.LatestRelease).ToList().ToPagedList(page, 15);
            ViewBag.Search = query;
            return PartialView("_Shows", model);
        }

        model = ViewModelFactory.Instance.CreateShowViewModels(_showRepository.GetShows()).OrderByDescending(x => x.LatestRelease).ToList().ToPagedList(page, 15);
        ViewBag.Search = null;
        return View(model);
    }

When I put a breakpoint at both the View and the PartialView call, it hits the View whenever I use pagination (and thus causing all data to be displayed each time). Why aren't my requests seen as AJAX ones?

回答1:

Make sure that .main-content is a true ancestor of your pagination links; otherwise, the event delgation $(".main-content").on("click", ".pagedlist a", getPage) won't work.

Update:

Follow-up issue. this:

var $target = $a.parents("div.pagedlist").attr("data-nn-target");

...should be this instead:

var $target = $($a.parents("div.pagedlist").attr("data-nn-target"));

This is because attr("data-nn-target") will just give you the selector, not a jQuery object using that selector.

来源：https://stackoverflow.com/questions/17369597/ajax-request-isnt-recognized-as-such

标签

javascript

jquery

ajax

asp.net-mvc

pagedlist