ASP.NET Auto Complete DropDownList

Question

is there any Control or Jquery Plugin exist for asp.net Auto Complete DropDownList? if yes please link a sample here. I don't want use asp.net ajax control toolkit

Answer 1

        //just put this script in your page and call the class combobox2 in your dropdownlist  


        <script type="text/javascript">
                    (function ($) {
                        $.widget("custom.combobox2", {
                            _create: function () {
                                this.wrapper = $("<span>")
                                .addClass("custom-combobox2")
                                .insertAfter(this.element);
                                this.element.hide();
                                this._createAutocomplete();
                                this._createShowAllButton();
                            },
                            _createAutocomplete: function () {
                                var selected = this.element.children(":selected"),
                                value = selected.val() ? selected.text() : "";
                                this.input = $("<input style='width:auto;'>")
                                .appendTo(this.wrapper)
                                .val(value)
                                .attr("title", "")
                                .addClass("custom-combobox2-input ui-widget ui-widget-content ui-state-default ui-corner-left")
                                .autocomplete({
                                    delay: 0,
                                    minLength: 0,
                                    source: $.proxy(this, "_source")
                                })
                                .tooltip({
                                    tooltipClass: "ui-state-highlight"
                                });
                                this._on(this.input, {
                                    autocompleteselect: function (event, ui) {
                                        ui.item.option.selected = true;
                                        this._trigger("select", event, {
                                            item: ui.item.option
                                        });
                                    },
                                    autocompletechange: "_removeIfInvalid"
                                });
                            },
                            _createShowAllButton: function () {
                                var input = this.input,
                                wasOpen = false;
                                $("<a>")
                                .attr("tabIndex", -1)
                                .attr("title", "Show All Items")
                                .appendTo(this.wrapper)
                                .button({
                                    icons: {
                                        primary: "ui-icon-triangle-1-s"
                                    },
                                    text: false
                                })
                                .removeClass("ui-corner-all")
                                .addClass("custom-combobox2-toggle ui-corner-right")
                                .mousedown(function () {
                                    wasOpen = input.autocomplete("widget").is(":visible");
                                })
                                .click(function () {
                                    input.focus();
                                    // Close if already visible
                                    if (wasOpen) {
                                        return;
                                    }
                                    // Pass empty string as value to search for, displaying all results
                                    input.autocomplete("search", "");
                                });
                            },
                            _source: function (request, response) {
                                var matcher = new RegExp($.ui.autocomplete.escapeRegex(request.term), "i");
                                response(this.element.children("option").map(function () {
                                    var text = $(this).text();
                                    if (this.value && (!request.term || matcher.test(text)))
                                        return {
                                            label: text,
                                            value: text,
                                            option: this
                                        };
                                }));
                            },
                            _removeIfInvalid: function (event, ui) {
                                // Selected an item, nothing to do
                                if (ui.item) {
                                    return;
                                }
                                // Search for a match (case-insensitive)
                                var value = this.input.val(),
                                valueLowerCase = value.toLowerCase(),
                                valid = false;
                                this.element.children("option").each(function () {
                                    if ($(this).text().toLowerCase() === valueLowerCase) {
                                        this.selected = valid = true;
                                        return false;
                                    }
                                });
                                // Found a match, nothing to do
                                if (valid) {
                                    return;
                                }
                                // Remove invalid value
                                this.input
                                .val("")
                                .attr("title", value + " didn't match any item")
                                .tooltip("open");
                                this.element.val("");
                                this._delay(function () {
                                    this.input.tooltip("close").attr("title", "");
                                }, 2500);
                                this.input.data("ui-autocomplete").term = "";
                            },
                            _destroy: function () {
                                this.wrapper.remove();
                                this.element.show();
                            }
                        });
                    })(jQuery);
                    $(function () {
                        $(".combobox2").combobox2();
                        $(".combobox2").combobox2({
                            select: function (event, ui) {
                                var f = document.getElementById("<%=form1.ClientID%>");
                                    f.submit();
                                }
                            });
                        });
                </script>


<asp:DropDownList ID="DDL_Groups4_Assign" runat="server" AppendDataBoundItems="True" AutoPostBack="True" CausesValidation="True" OnSelectedIndexChanged="DDL_Groups4_Assign_SelectedIndexChanged" Width="250px" CssClass="combobox2">
          <asp:ListItem Selected="True">Select</asp:ListItem>
                                            </asp:DropDownList>

Answer 2

I don't know if this is what you're looking for but there is a nice Facebook-like type-ahead list here:

https://github.com/emposha/FCBKcomplete

It is a jQuery plugin, and uses AJAX to call a web service to load the items for the list as you type, and implements some smart caching as well to save on web service calls. Like I said, might not be exactly what you're looking for, but it's worth a glance at least.

Also check out jQuery autocomplete.

http://jqueryui.com/demos/autocomplete/

Answer 3

jQuery AutoComplete can work with DropDownList

http://jqueryui.com/demos/autocomplete/#combobox