I took reference from here
Implement jQuery Autocomplete using Web Service in ASP.Net
And below is the code
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<script src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8/jquery-ui.min.js"
type="text/javascript"></script>
<link href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8/themes/base/jquery-ui.css"
rel="Stylesheet" type="text/css" />
<script type="text/javascript">
$(document).ready(function () {
$("#<%=txtSearch.ClientID %>").autocomplete({
source: function (request, response) {
$.ajax({
url: '<%=ResolveUrl("~/Service.asmx/GetCustomers") %>',
data: "{ 'prefix': '" + request.term + "'}",
dataType: "json",
type: "POST",
contentType: "application/json; charset=utf-8",
success: function (data) {
response($.map(data.d, function (item) {
return {
label: item.split('-')[0],
val: item.split('-')[1]
}
}))
},
error: function (response) {
alert(response.responseText);
},
failure: function (response) {
alert(response.responseText);
}
});
},
select: function (e, i) {
$.ajax({
type: "POST",
url: '<%=ResolveUrl("~/Service.asmx/GetCustomer") %>',
data: '{customerId: "' + i.item.val + '"}',
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function (response) {
var xmlDoc = $.parseXML(response.d);
var xml = $(xmlDoc);
var customer = xml.find("Table");
$("#lblName").html(customer.eq(0).find("ContactName").text());
$("#lblCity").html(customer.eq(0).find("City").text());
$("#lblCountry").html(customer.eq(0).find("Country").text());
},
failure: function (response) {
alert(response.d);
},
error: function (response) {
alert(response.d);
}
});
},
minLength: 1
});
});
</script>
</head>
<body>
<form id="form1" runat="server">
<asp:TextBox ID="txtSearch" runat="server"></asp:TextBox>
<hr />
Name: <span id="lblName"></span>
<br />
City: <span id="lblCity"></span>
<br />
Country: <span id="lblCountry"></span>
</form>
</body>
</html>
Web Service code
using System;
using System.Collections.Generic;
using System.Web;
using System.Web.Services;
using System.Data.SqlClient;
using System.Configuration;
using System.Web.Script.Services;
using System.Data;
/// <summary>
/// Summary description for Service_CS
/// </summary>
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
// To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line.
[System.Web.Script.Services.ScriptService]
public class Service : System.Web.Services.WebService {
public Service () {
//Uncomment the following line if using designed components
//InitializeComponent();
}
[WebMethod]
[ScriptMethod(ResponseFormat = ResponseFormat.Json)]
public string[] GetCustomers(string prefix)
{
List<string> customers = new List<string>();
using (SqlConnection conn = new SqlConnection())
{
conn.ConnectionString = ConfigurationManager
.ConnectionStrings["constr"].ConnectionString;
using (SqlCommand cmd = new SqlCommand())
{
cmd.CommandText = "select ContactName, CustomerId from Customers where " +
"ContactName like @SearchText + '%'";
cmd.Parameters.AddWithValue("@SearchText", prefix);
cmd.Connection = conn;
conn.Open();
using (SqlDataReader sdr = cmd.ExecuteReader())
{
while (sdr.Read())
{
customers.Add(string.Format("{0}-{1}", sdr["ContactName"], sdr["CustomerId"]));
}
}
conn.Close();
}
return customers.ToArray();
}
}
[WebMethod]
public string GetCustomer(string customerId)
{
DataSet ds = new DataSet();
using (SqlConnection conn = new SqlConnection())
{
conn.ConnectionString = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
using (SqlCommand cmd = new SqlCommand())
{
cmd.CommandText = "select ContactName, City, Country from Customers where CustomerId = @CustomerId";
cmd.Parameters.AddWithValue("@CustomerId", customerId);
cmd.Connection = conn;
using (SqlDataAdapter sda = new SqlDataAdapter(cmd))
{
sda.Fill(ds);
}
}
return ds.GetXml();
}
}
}
