Jquery自动完成 - 无结果消息 [英] Jquery Autocomplete - no result message

问题描述

如果找不到结果，我希望自动完成功能在下拉列表中显示无结果列表。

I would like the autocomplete to display "no results" in it's drop down list if no result are found.

我的情况与JQuery默认示例类似。

My situation is like the JQuery default example.

$(function() {
    var availableTags = [
        "ActionScript",
        "AppleScript",
        "Asp",
        "BASIC",
        "C",
        "C++",
        "Clojure",
        "COBOL",
        "ColdFusion",
        "Erlang",
        "Fortran",
        "Groovy",
        "Haskell",
        "Java",
        "JavaScript",
        "Lisp",
        "Perl",
        "PHP",
        "Python",
        "Ruby",
        "Scala",
        "Scheme"
        ];
    $( "#tags" ).autocomplete({
        source: availableTags
    });
});

感谢您的帮助。

Thank you for your help.

推荐答案

Here's one way you could accomplish this:

$ b $ var
$（＃tags）。autocomplete（{
source：
$ b $函数（请求，响应）{
var results = $ .ui.autocomplete.filter（availableTags，request.term）;

if（！results.length）{
results = [NoResultsLabel];
}

response（results）;
}，
select：function（event，ui）{
if（ui。 item.label === NoResultsLabel）{
event.preventDefault（）;
}
}，
focus：function（event，ui）{
if（ui .item.label === NoResultsLabel）{
event.preventDefault（）;
}
}
}）;
}）;

$(function() { var availableTags = [ /* snip */]; var NoResultsLabel = "No Results"; $("#tags").autocomplete({ source: function(request, response) { var results = $.ui.autocomplete.filter(availableTags, request.term); if (!results.length) { results = [NoResultsLabel]; } response(results); }, select: function (event, ui) { if (ui.item.label === NoResultsLabel) { event.preventDefault(); } }, focus: function (event, ui) { if (ui.item.label === NoResultsLabel) { event.preventDefault(); } } }); });

基本上，您需要提供函数引用作为源到自动完成。在该函数内部，您可以使用相同的实用程序函数（ $。ui.autocomplete.filter ）来过滤结果。然后你可以看到结果数组是否为空。如果是这样，您可以将默认消息添加到结果列表中。

Basically, you need to provide a function reference as the source to the autocomplete. Inside of that function, you can use the same utility function ($.ui.autocomplete.filter) to filter down the results. Then you can see if the results array is empty. If it is, you can add a default message to the results list.

我指定的另外两个选项可防止无结果选项从选择或集中。

The other two options I've specified prevent the No Results option from being selected or focused.

示例： http://jsfiddle.net/er6LF/

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