jQuery autocomplete with images and text

Step 1 : Create the countries table and the stored procedure to retrieve data

Create table tblCountry
(
    Id int identity primary key,
    Name nvarchar(100),
    FlagPath nvarchar(200)
)
Go

Insert into tblCountry values('Canada','/Flags/canada.png')
Insert into tblCountry values('Chile','/Flags/chile.png')
Insert into tblCountry values('China','/Flags/china.png')
Insert into tblCountry values('Cyprus','/Flags/cyprus.png')
Go

Create proc spGetCountries
@Name nvarchar(100)
as
Begin
    Select * from tblCountry where Name like @Name + '%'
End
Go

Step 2 : Create new asp.net web application project. Name it Demo.

Step 3 : Include a connection string in the web.config file to your database.
<add name="DBCS"
      connectionString="server=.;database=SampleDB;integrated security=SSPI"/>

Step 4 : Add a folder with Name = flags to the project. Copy and paste the respective country flag images.

Step 5 : Add a class file to the project. Name it Country.cs. Copy and paste the following code.
namespace Demo
{
    public class Country
    {
        public int Id { get; set; }
        public string Name { get; set; }
        public string FlagPath { get; set; }
    }
}

Step 6 : Add a WebService (ASMX) to the project. Name it CountryService.asmx. Copy and paste the following code.

using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;
using System.Web.Script.Serialization;
using System.Web.Services;

namespace Demo
{
    [WebService(Namespace = "http://tempuri.org/")]
    [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
    [System.ComponentModel.ToolboxItem(false)]
    [System.Web.Script.Services.ScriptService]
    public class CountryService : System.Web.Services.WebService
    {
        [WebMethod]
        public void GetCountries(string term)
        {
            string cs = ConfigurationManager.ConnectionStrings["DBCS"].ConnectionString;
            List<Country> countries = new List<Country>();
            using (SqlConnection con = new SqlConnection(cs))
            {
                SqlCommand cmd = new SqlCommand("spGetCountries", con);
                cmd.CommandType = CommandType.StoredProcedure;

                SqlParameter paramName = new SqlParameter()
                {
                    ParameterName = "@Name",
                    Value = term
                };
                cmd.Parameters.Add(paramName);

                con.Open();
                SqlDataReader rdr = cmd.ExecuteReader();

                while (rdr.Read())
                {
                    Country country = new Country();
                    country.Id = Convert.ToInt32(rdr["Id"]);
                    country.Name = rdr["Name"].ToString();
                    country.FlagPath = rdr["FlagPath"].ToString();
                    countries.Add(country);
                }
            }

            JavaScriptSerializer js = new JavaScriptSerializer();
            Context.Response.Write(js.Serialize(countries));
        }
    }
}

Step 7 : Download jQuery UI from jqueryui.com. Copy and paste the following files in your project.
a) jquery-ui.js
b) jquery-ui.css
c) images

Step 8 : Add a WebForm to the ASP.NET project. Copy and paste the following HTML and jQuery code. 

<%@ Page Language="C#" AutoEventWireup="true"
    CodeBehind="WebForm1.aspx.cs" Inherits="Demo.WebForm1" %>

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
    <script src="jquery-1.11.2.js"></script>
    <script src="jquery-ui.js"></script>
    <link href="jquery-ui.css" rel="stylesheet" />
    <script type="text/javascript">
        $(document).ready(function () {
            $('#txtName').autocomplete({
                minLength: 1,
                source: function (request, response) {
                    $.ajax({
                        url: 'CountryService.asmx/GetCountries',
                        method: 'post',
                        data: { term: request.term },
                        dataType: 'json',
                        success: function (data) {
                            response(data);
                        },
                        error: function (err) {
                            alert(err);
                        }
                    });
                },
                focus: updateTextBox,
                select: updateTextBox
            })
            .autocomplete('instance')._renderItem = function (ul, item) {
                return $('<li>')
                    .append("<img class='imageClass' src=" + item.FlagPath + " alt=" + item.Name + "/>")
                    .append('<a>' + item.Name + '</a>')
                    .appendTo(ul);
            };

            function updateTextBox(event, ui) {
                $(this).val(ui.item.Name);
                return false;
            }
        });
    </script>
    <style>
        .imageClass {
            width: 16px;
            height: 16px;
            padding-right: 3px;
        }
    </style>
</head>
<body style="font-family: Arial">
    <form id="form1" runat="server">
        Country Name : <input id="txtName" type="text" />
    </form>
</body>
</html>

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