aspx Textbox Search from sql server database (like google search):

aspx Textbox Search from sql server (like google search):
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  <link rel="stylesheet" href="http://code.jquery.com/ui/1.10.3/themes/smoothness/jquery-ui.css">
        <script src="http://code.jquery.com/jquery-1.9.1.js"></script>
        <script src="http://code.jquery.com/ui/1.10.3/jquery-ui.js"></script>

aspx page code:
 -------------------------------
           <script language="javascript" type="text/javascript">
            $(function () {
                $('#<%=txtcustname.ClientID%>').autocomplete({
                    source: function (request, response) {
                        $.ajax({
                            url: "enquiry.aspx/GetCompanyName",
                            data: "{ 'customer':'" + request.term + "'}",
                            dataType: "json",
                            type: "POST",
                            contentType: "application/json; charset=utf-8",
                            success: function (data) {
                                response($.map(data.d, function (item) {
                                    return { value: item }
                                }))
                            },
                            error: function (XMLHttpRequest, textStatus, errorThrown) {
                                alert(textStatus);
                            }
                        });
                    }
                });
            });
</script>

<asp:TextBox ID="txtcustname" runat="server"  CssClass="textboxAuto" ></asp:TextBox>

C# CodeBehibd
-------------------------

 [WebMethod]
        [ScriptMethod(ResponseFormat = ResponseFormat.Json)]
        public static List<string> GetCompanyName(string customer)
        {
            mainclass objmc = new mainclass();
            List<string> result = new List<string>();
            using (SqlCommand cmd = new SqlCommand("select name from customer where name LIKE @SearchText+'%'", objmc.con))
            {
                objmc.con.Open();
                cmd.Parameters.AddWithValue("@SearchText", customer);
                SqlDataReader dr = cmd.ExecuteReader();
                while (dr.Read())
                {
                    result.Add(dr["name"].ToString());
                }
                return result;
            }
        }

DEMO: