我开发了自定义自动完成功能，可以在页面中提取和显示数据。我想加强它。我希望实现类似this (multiple dataset of typeahead pluggin)的内容，我想在按下向上/向上箭头键时选择或设置焦点在我的自动完成的下一个和上一个li上。这是我的jquery代码，用于填充自动完成。
$("input[data-tg-autocomplete]").keyup(function (e) {
if (e.keyCode == 40 || e.keyCode == 38) {
//alert(e.keyCode);
DownUpKeyPress(e.keyCode);
}
else {
var $input = $(this);
//-----------------------------Allowing user to enter atleast one character for auto search
if ($input.val().length > 0) {
var request = $.ajax({
url: $input.attr("data-tg-autocomplete"),
method: "GET",
data: { term: $input.val() },
dataType: "json"
});
request.done(function (JsonData) {
LoadAutoSuggest(JsonData);
});
request.fail(function (jqXHR, textStatus) {
//alert("Request failed: " + textStatus);
});
}
}
});
//========================populate autocomplete
function LoadAutoSuggest(result) {
var tag = "";
$('.custom-autocomplete').html("");
if (result.Destination != undefined) {
tag = tag + "<li class=''>";
tag = tag + "<a href='#' class='list-group-item active disabled AutoCompleteHeader'>";
tag = tag + "Destination";
tag = tag + "</a>";
tag = tag + "</li>";
for (i = 0; i < result.Destination.length - 1; i++) {
tag = tag + "<li class='list-group-item'>";
tag = tag + "<a class='autocompleteListItem' data-type='Destination' data-id='" + result.Destination[i].DestinationID + "'>";
tag = tag + "<div>";
tag = tag + result.Destination[i].DestinationName;
// tag = tag + "<span class='pull-right badge'>14</span>";
tag = tag + "</div>";
tag = tag + "</a>";
tag = tag + "</li>";
}
}
if (result.Business != undefined) {
tag = tag + "<li class=''>";
tag = tag + "<a href='#' class='list-group-item active disabled AutoCompleteHeader'>";
tag = tag + "Business";
tag = tag + "</a>";
tag = tag + " </li>";
for (i = 0; i < result.Business.length - 1; i++) {
tag = tag + "<li class='list-group-item'>";
tag = tag + "<a class='autocompleteListItem' data-type='Business' data-id='" + result.Business[i].BusinessID + "'>";
tag = tag + "<div>";
tag = tag + result.Business[i].BusinessName;
// tag = tag + "<span class='pull-right badge'>14</span>";
tag = tag + "</div>";
tag = tag + "</a>";
tag = tag + "</li>";
//alert(result.Business[i].BusinessName + " ID = " + result.Business[i].BusinessID)
}
}
$('.custom-autocomplete').html(tag);
$('.autocompleteListItem').click(function () {
var id = $(this).attr("data-id");
var type = $(this).attr("data-type");
var text = $(this).text();
$("#searchtext").val(text);
$('.HiddenSearchInput #id').val(id);
$('.HiddenSearchInput #type').val(type);
$('.custom-autocomplete').html("");
$('.Search-submit').trigger("click");
});
$(':not(".search-wrapper")').click(function () {
if ($('.custom-autocomplete li').length > 0) {
$('.custom-autocomplete').html("");
}
});
$('.custom-autocomplete li.list-group-item').first().addClass("focused");
}
function DownUpKeyPress(keyCode) {
//$this = $(this);
if (keyCode == 40) {
// alert('40');
// $this.next().focus();
if ($('.custom-autocomplete li').length > 0) {
var $focused = $('.custom-autocomplete li.focused');
$('.custom-autocomplete li.focused ~ .list-group-item').first().addClass('focused')
$focused.removeClass('focused')
}
return false;
} else if (keyCode == 38) {
//alert('38');
// $this.prev().focus();
if ($('.custom-autocomplete li').length > 0) {
}
return false;
}
}
这是我的html，我填充自动完成
<div class="Search-container">
<span class="error search-validation"></span>
<div class="input-group input-group-lg">
<input id="searchtext" name="searchtext" type="text" class="form-control " placeholder="Find travel agents, search travel agents in your destination" data-tg-autocomplete="@Url.Action("AutocompleteBusiness")" />
<span class="input-group-btn">
<button class="btn btn-primary Search-submit" type="submit">
<span class="glyphicon glyphicon-search"></span>
</button>
</span>
</div><!-- /input-group -->
<div class="displaynone HiddenSearchInput">
<input type="hidden" id="id" name="id" value="" />
<input type="hidden" id="type" name="type" value="" />
</div>
</div>
<ul class="list-group custom-autocomplete">
@*List will be populated from ajax call in function LoadAutoSuggest*@
</ul>
我的函数DownUpKeyPress用于设置下一个和上一个li的焦点。聚焦的li项目将用于站点搜索，但是当按下向上/向下箭头时，我无法将注意力集中在下一个和上一个li上。我正在使用MVC5来开发我的项目。可能我错了jquery。愿有人帮我解决问题。我不想为此使用任何插件。
答案 0 :(得分：0)
在DownUpKeyPress
// for up arrow => Previous Li Focus
if (keyCode == 40) {
if ($('.custom-autocomplete li').length > 0) {
var oBox = $('.custom-autocomplete > .list-group-item.focused').next('li');
var curClass = oBox.attr("class");
if (oBox.length == 0) {
$('.custom-autocomplete > .list-group-item.focused').removeClass('focused');
$('.custom-autocomplete > .list-group-item').first().addClass('focused');
}
else if (curClass == "") {
$('.custom-autocomplete > .list-group-item.focused').removeClass('focused').next('li').next('li').addClass('focused');
}
else {
$('.custom-autocomplete > .list-group-item.focused').removeClass('focused').next('li').addClass('focused');
}
}
return false;
}
// for down arrow => Next Li Focus
else if (keyCode == 38) {
if ($('.custom-autocomplete li').length > 0) {
var oBox = $('.custom-autocomplete > .list-group-item.focused').prev('li');
var curClass = oBox.attr("class");
if (oBox.length == 0) {
$('.custom-autocomplete > .list-group-item.focused').removeClass('focused');
$('.custom-autocomplete > .list-group-item').last().addClass('focused');
}
else if (curClass == "") {
$('.custom-autocomplete > .list-group-item.focused').removeClass('focused').prev('li').prev('li').addClass('focused');
}
else {
$('.custom-autocomplete > .list-group-item.focused').removeClass('focused').prev('li').addClass('focused');
}
}
return false;
}