How to use source: function()... and AJAX in JQuery UI autocomplete

Question

I need a little bit help with JQuery UI Autocomplete. I want my textfield input.suggest-user display names from an AJAX request. This is what I have:

jQuery("input.suggest-user").autocomplete({
  source: function(request, response) {
    var name = jQuery("input.suggest-user").val();
    jQuery.get("usernames.action?query=" + name, function(data) {
      // Ok, I get the data which looks like:
      // ["[email protected]", "[email protected]","[email protected]"]
      // But what now? How do I display my data?
      test = data;
      return test;
    });
  },
  minLength: 3
});

Any help is very much appreciated.

Suanne

Answer 1

Inside your AJAX callback you need to call the response function; passing the array that contains items to display.

jQuery("input.suggest-user").autocomplete({
    source: function (request, response) {
        jQuery.get("usernames.action", {
            query: request.term
        }, function (data) {
            // assuming data is a JavaScript array such as
            // ["[email protected]", "[email protected]","[email protected]"]
            // and not a string
            response(data);
        });
    },
    minLength: 3
});

If the response JSON does not match the formats accepted by jQuery UI autocomplete then you must transform the result inside the AJAX callback before passing it to the response callback. See this question and the accepted answer.

Warrant

It is a little bit more simple. jQuery autocomplete supports a get url for the 'source' parameter. source: "usernames.action" . Your method should return a json array and should accept a parameter called "term". – Proptosis

@Elisa: correct. The OP used a callback in the example (may be for a reason) so I followed suit. – Warrant

This doesn't work for me... it returns all of the items in the list, instead of the ones that match the query term. – Zoogloea

OP filters the results on server side, this answer assumes that. – Warrant

Is there a way to filter results in the front end, with the jquery autocomplete library, after doing an ajax call? – Advancement

@TechyTimo you can filter the results inside jQuery.get callback before calling the response function. In the above example the code would go where the comments are. – Warrant

Hello @SalmanA, can you check this once pls #33411324 Thanks. – Sprout

response() function inside ajax call will create some <li> elements to display. How shall I do if I want to add an attribute to that <li> when it's created? – Veilleux

@LoryLory if you want to modify the autocomplete's suggestion list then search stackoverflow for "jquery ui autocomplete _renderItem". – Warrant

What does "query: request.term" means? – Neolatin

@Suanne What does "query: request.term" means? – Neolatin

@Neolatin - "query: request.term" is what is send to the server as a query string. In this example if user enters FOO then request.term=foo and server request will be send to usernames.action?query=foo. – Shockey

Answer 2

Try this code. You can use $.get instead of $.ajax

$( "input.suggest-user" ).autocomplete({
    source: function( request, response ) {
        $.ajax({
            dataType: "json",
            type : 'Get',
            url: 'yourURL',
            success: function(data) {
                $('input.suggest-user').removeClass('ui-autocomplete-loading');  
                // hide loading image

                response( $.map( data, function(item) {
                    // your operation on data
                }));
            },
            error: function(data) {
                $('input.suggest-user').removeClass('ui-autocomplete-loading');  
            }
        });
    },
    minLength: 3,
    open: function() {},
    close: function() {},
    focus: function(event,ui) {},
    select: function(event, ui) {}
});

Morris

Answer 3

$("#id").autocomplete(
{
    search: function () {},
    source: function (request, response)
    {
        $.ajax(
        {
            url: ,
            dataType: "json",
            data:
            {
                term: request.term,
            },
            success: function (data)
            {
                response(data);
            }
        });
    },
    minLength: 2,
    select: function (event, ui)
    {
        var test = ui.item ? ui.item.id : 0;
        if (test > 0)
        {
           alert(test);
        }
    }
});

Grum

Answer 4

On the .ASPX page:

  <%@ Page Language="C#" AutoEventWireup="true"  CodeFile="Default.aspx.cs" Inherits="_Default" %>
  <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

  <html xmlns="http://www.w3.org/1999/xhtml">
  <head id="Head1" runat="server">
        <title>AutoComplete Box with jQuery</title>
        <link href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.1/themes/base/jquery-ui.css" rel="stylesheet" type="text/css"/>
        <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
        <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.1/jquery-ui.min.js"></script>  
        <script type="text/javascript">
            $(document).ready(function() {
                SearchText();
            });
            function SearchText() {
                $(".autosuggest").autocomplete({
                    source: function(request, response) {
                        $.ajax({
                            type: "POST",
                            contentType: "application/json; charset=utf-8",
                            url: "Default.aspx/GetAutoCompleteData",
                            data: "{'username':'" + document.getElementById('txtSearch').value + "'}",
                            dataType: "json",
                            success: function (data) {
                                if (data != null) {

                                    response(data.d);
                                }
                            },
                            error: function(result) {
                                alert("Error");
                            }
                        });
                    }
                });
            }
        </script>
  </head>
  <body>
      <form id="form1" runat="server">
          <div class="demo">
           <div class="ui-widget">
            <label for="tbAuto">Enter UserName: </label>
       <input type="text" id="txtSearch" class="autosuggest" />
    </div>
        </form>
    </body>
    </html>    

In your .ASPX.CS code-behind file:

using System;
using System.Collections.Generic;
using System.Data.SqlClient;
using System.Web.Services;
using System.Data;

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
    }

    [WebMethod]
    public static List<string> GetAutoCompleteData(string username)
    {
        List<string> result = new List<string>();
            SqlConnection con = new SqlConnection("Data Source=YourDatasource;Initial Catalog=DatabseName;uid=sa;password=123");

            SqlCommand cmd = new SqlCommand("select DISTINCT Name from Address where Name LIKE '%'+@Name+'%'", con);
            con.Open();
                cmd.Parameters.AddWithValue("@Name", username);
                SqlDataReader dr = cmd.ExecuteReader();

                while (dr.Read())
                {
                    result.Add(dr["Name"].ToString());
                }
                return result;
        }
}

Cordiacordial

@Sprout Because a GET request causes: "An attempt was made to call the method 'GetAutoCompleteData' using a GET request, which is not allowed." See: #18704338 – Momently

Answer 5

This is completely new working code with sample AJAX call.

<link href="https://cdnjs.cloudflare.com/ajax/libs/jqueryui/1.11.4/jquery-ui.min.css" rel="stylesheet" />
<script src="http://code.jquery.com/jquery-1.9.1.min.js"></script>
<script src="http://code.jquery.com/ui/1.10.3/jquery-ui.min.js"></script>

<div>
    <div id="project-label">Select a project (type "j" for a start):</div>
    <img id="project-icon" src="images/transparent_1x1.png" class="ui-state-default" alt="" />
    <input id="project" />
    <input type="hidden" id="project-i" />
</div>


@*Auto Complete*@
<script>
    $(function () {

        $("#project").autocomplete({
            minLength: 0,
            source : function( request, response ) {
                $.ajax({
                    url: "http://jsonplaceholder.typicode.com/posts/1/comments",
                    dataType: "jsonp",
                    data: {
                        q: request.term
                    },
                    success: function (data) {
                        response( data );
                    }
                });
            },
            focus: function (event, ui) {
                $("#project").val(ui.item.label);
                return false;
            },
            select: function (event, ui) {
                $("#project").val(ui.item.name);
                $("#project-id").val(ui.item.email);                    

                return false;
            }
        })
            .data("ui-autocomplete")._renderItem = function (ul, item) {
                return $("<li>")
                    .data("ui-autocomplete-item", item)
                    .append("<a> " + item.name + "<br>" + item.email + "</a>")
                    .appendTo(ul);
            };
    });
</script>

Dasteel

I see you get a jsonp response from the ajax call. What is the name of the callback function? – Meal

Answer 6

Set the auto complete:

$("#searchBox").autocomplete({
    source: queryDB
});

The source function that gets the data:

function queryDB(request, response) {
    var query = request.term;
    var data = getDataFromDB(query);
    response(data); //puts the results on the UI
}

Bolshevist

Answer 7

When you ask about:

Blockquote // But what now? How do I display my data? Blockquote

you need to map an array of object, that way:

response([{label: 'result_name', value: 'result_id'},]);

That way when you use the select event of the autocomplete plugin, you can see the result bellow;

You can use the select event that way:

jQuery("#field").autocomplete({
      source: function (request, response) {

      },
      minLength: 3,
      select: function(event, ui)
      {
        console.log(ui);
      }
  });

I hope that it can help and complement the answers.

Planula

Answer 8

$("#subject_name").autocomplete({
  source: function(request, response) {
    $.ajax({
      url: "api/listBasicsubject",
      dataType: "json",
      type: "post",
      data: {
        search: request.term
      },
      success: function(data) {

        if (!data.length) {
          var result = [{
            label: 'Subject not found',
            value: response.term
          }];
          response(result);
        } else {
          //response(data.data);
          response($.map(data.data, function(item) {
            return {
              label: item.subject_name,
              value: item.subject_id
            }
          }));
        }
      }
    });
  },
  change: function(event, ui) {
    if (ui.item == null) {
      $("#subject_name").val("");
      $("#subject_code").val("");
      $("#subject_name").focus();
    }
  },

  minLength: 0,
  classes: {
    "ui-autocomplete": "auto_compl-cat"
  },

  focus: function(event, ui) {
    event.preventDefault();
    // $("#subject_name").val(ui.item.label);

    $("#subject_name").val(ui.item.label);

  },

  select: function(event, ui) {
    if (ui.item.label == "Subject not found") {

      $("#subject_name").val('');
      $("#subject_code").val('');
      event.preventDefault();
      return false;
    }
    //console.log( "Selected: " + ui.item.label + " aka " + ui.item.value);
    $("#subject_name").val(ui.item.label);
    $("#subject_code").val(ui.item.value);
    return false;
  }
});

Osuna