jQuery UI Widgets › Forums › Lists › DropDownList › autoDropDownHeight problem when large data

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This topic contains 1 reply, has 2 voices, and was last updated by  Dimitar 10 years, 8 months ago.

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    autoDropDownHeight problem when large data Posts
  • May 27, 2014 at 12:22 pm autoDropDownHeight problem when large data #54971

    jishnu2026
    Participant

    i am facing same issue on this url

    http://www.jqwidgets.com/community/topic/dropdownlist-height-issue/
    like data come from data base and populated in dropdown .
    NO ARRAY how to solve this issue using database item
    thanks

    May 27, 2014 at 12:39 pm autoDropDownHeight problem when large data #54974

    Dimitar
    Participant

    Hello jishnu2026,

    Here is how to achieve this functionality when the dropdownlist is loaded from a data adapter (the example is based on the demo Binding to JSON Data):

    <!DOCTYPE html>
<html lang="en">
<head>
    <link rel="stylesheet" href="../../jqwidgets/styles/jqx.base.css" type="text/css" />
    <script type="text/javascript" src="../../scripts/jquery-1.10.2.min.js"></script>
    <script type="text/javascript" src="../../scripts/demos.js"></script>
    <script type="text/javascript" src="../../jqwidgets/jqxcore.js"></script>
    <script type="text/javascript" src="../../jqwidgets/jqxdata.js"></script>
    <script type="text/javascript" src="../../jqwidgets/jqxbuttons.js"></script>
    <script type="text/javascript" src="../../jqwidgets/jqxscrollbar.js"></script>
    <script type="text/javascript" src="../../jqwidgets/jqxlistbox.js"></script>
    <script type="text/javascript" src="../../jqwidgets/jqxdropdownlist.js"></script>
</head>
<body>
    <div id='content'>
        <script type="text/javascript">
            $(document).ready(function () {
                var url = "../sampledata/customers.txt";

                // prepare the data
                var source =
                {
                    datatype: "json",
                    datafields: [
                        { name: 'CompanyName' },
                        { name: 'ContactName' }
                    ],
                    url: url,
                    async: false
                };

                var auto = true;
                var dataAdapter = new $.jqx.dataAdapter(source, { autoBind: true, loadComplete: function (data) {
                    if (data.length > 10) {
                        auto = false;
                    }
                }
                });

                // Create a jqxDropDownList
                $("#jqxWidget").jqxDropDownList({
                    selectedIndex: 0, source: dataAdapter, displayMember: "ContactName", valueMember: "CompanyName", width: 200, height: 25, dropDownHeight: 100, autoDropDownHeight: auto
                });

                // subscribe to the select event.
                $("#jqxWidget").on('select', function (event) {
                    if (event.args) {
                        var item = event.args.item;
                        if (item) {
                            var valueelement = $("<div></div>");
                            valueelement.text("Value: " + item.value);
                            var labelelement = $("<div></div>");
                            labelelement.text("Label: " + item.label);

                            $("#selectionlog").children().remove();
                            $("#selectionlog").append(labelelement);
                            $("#selectionlog").append(valueelement);
                        }
                    }
                });
            });
        </script>
        <div id='jqxWidget'>
        </div>
        <div style="font-size: 12px; font-family: Verdana;" id="selectionlog">
        </div>
    </div>
</body>
</html>

    Best Regards,
    Dimitar

    jQWidgets team
    http://www.jqwidgets.com/

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