AutoCompelete using Ajax in Asp.net
Ajax is a powerful script on the web, It provides you a lot more functionality to
improve your application performance.
Here's the article to show how to work with AutoCompleteExtender (Control in AjaxControlToolKIt).
AutoComplete Description
- AutoComplete is an ASP.NET AJAX extender that can be attached to any TextBox control, and will associate that control with a popup panel to display words that begin with the prefix typed into the textbox.
- The dropdown with candidate words supplied by a web service is positioned on the bottom left of the text box.
Note: Add the latest Ajax DLL in your application bin folder.
Step 1: Add Webservices (WebService.asmx)
C# Code: appcode/WebService.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Services;
using System.Collections;
/// Summary description for WebService
[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 WebService : System.Web.Services.WebService {
public WebService () {
//Uncomment the following line if using designed components
//InitializeComponent();
}
[WebMethod]
public string[] GetNames(string prefixText, int count, string contextKey)
{
ArrayList sampleList = new ArrayList();
sampleList.Add("ABC"); sampleList.Add("Hello");
sampleList.Add("Hi"); sampleList.Add("Apple");
sampleList.Add("Hey");
ArrayList filteredList = new ArrayList();
foreach (string s in sampleList){
if (s.ToLower().StartsWith(prefixText.ToLower()))
filteredList.Add(s);
}
return (string[])filteredList.ToArray(typeof(string));
}
}
Step 2: AC.aspx page:
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="Ajaxtoolkit" %> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"></head> <body> <form id="form1" runat="server"> <asp:scriptmanager id="ScriptManager1" runat="server"></asp:scriptmanager> <div> <asp:textbox id="TextBox1" runat="server"></asp:textbox> <ajaxtoolkit:autocompleteextender enabled="true" minimumprefixlength="0" runat="server" servicemethod="GetNames" servicepath="WebService.asmx" targetcontrolid="TextBox1" usecontextkey="true"> </ajaxtoolkit:autocompleteextender> </div> </form> </body> </html><%@ Page Language="C#" AutoEventWireup="true" CodeFile="Ac.aspx.cs" Inherits="Ac" %>
Thank you for reading, pls keep visiting this blog and share this in your network. Also, I would love to hear your opinions down in the comments.
PS: If you found this content valuable and want to thank me? 👳 Buy Me a Coffee
Post Comment
Your email address will not be published. Required fields are marked *