在.net中使用自动完成功能和多选自动完成功能

Question

我将以下代码用于自动完成功能。 如何将其更改为既可用于自动完成功能又可用于多选自动完成功能？

function AutoComplete(matchFieldName, resultFieldName, lookupURL) {
    $('#' + matchFieldName).autocomplete({
        minLength: 2, // set minimum of 2 characters before search executes.
        delay: 500, // wait 0.5 second after keystroke before search executes.
        source: function (request, response) {
            $.ajax({
                url: lookupURL,
                type: "POST",
                dataType: "json",
                data: { AutoCompleteSearch: request.term },
                success: function (data) {
                    response($.map(data, function (item) {
                        return { label: item.Title, value: item.Title, id: item.Id };
                    }))
                }
            });
        },
        select: function (event, ui) {
            $('#' + resultFieldName).val(ui.item.id).trigger('change');
        }
    });
}