Introduction:
AutoComplete is an ASP.NET AJAX extender that can be attached to any TextBox control, and will associate that control with a popup DropDown like list of words that begin with the prefix typed into the textbox.
Create a new website using ASP.NET Ajax-Enabled Web Site:
Now drag and drop three controls on page. ScriptManager, Textbox, AutoCompleteExtender.
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc1" %>
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server" />
<div>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<cc1:AutoCompleteExtender ID="AutoCompleteExtender1"
runat="server"
ServicePath="WebService.asmx"
ServiceMethod="FindName"
MinimumPrefixLength="1"
TargetControlID="TextBox1">
</cc1:AutoCompleteExtender>
</div>
</form>
Now add a new WebService class:
Here is web service code.
Imports System
Imports System.Collections.Generic
Imports System.Web
Imports System.Web.Services
Imports System.Web.Services.Protocols
Imports System.Data.SqlClient
Imports System.Data
Imports System.Data.Common
Imports AtlasTextBoxAutoComplete.DL
Imports System.Collections
<WebService(Namespace:="http://tempuri.org/")> _
<WebServiceBinding(ConformsTo:=WsiProfiles.BasicProfile1_1)> _
<System.Web.Script.Services.ScriptService()> _
<Global.Microsoft.VisualBasic.CompilerServices.DesignerGenerated()> _
Public Class WebService
Inherits System.Web.Services.WebService
<WebMethod()> _
<System.Web.Script.Services.ScriptMethod()> _
Public Function FindName(ByVal prefixText As String, ByVal count As Integer) As String()
'return all records whose Title starts with the prefix input string
Dim titleArList As New List(Of String)()
Dim drProducts As SqlDataReader = sqlProductProvider.GetNameList(prefixText)
While drProducts.Read()
Dim strTemp As String = Convert.ToString(drProducts("Name"))
titleArList.Add(strTemp)
End While
Return titleArList.ToArray()
End Function
End Class
Result will look like this:
