kankon says:
$("#<%=txtSearch.ClientID%>").autocomplete('~/Admin/Search_CS.ashx');
Replace above line with below.
$("#<%=txtSearch.ClientID%>").autocomplete({ source: '<%=ResolveUrl("~/Admin/Search_CS.ashx" ) %>' });
Check the below sample.
HTML
<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="Server">
<script type="text/javascript" src="https://ajax.aspnetcdn.com/ajax/jQuery/jquery-1.10.0.min.js"></script>
<script type="text/javascript" src="https://ajax.aspnetcdn.com/ajax/jquery.ui/1.9.2/jquery-ui.min.js"></script>
<link rel="Stylesheet" type="text/css" href="https://ajax.aspnetcdn.com/ajax/jquery.ui/1.9.2/themes/blitzer/jquery-ui.css" />
<script type="text/javascript">
$(document).ready(function () {
$("#<%=txtSearch.ClientID%>").autocomplete({ source: '<%=ResolveUrl("~/Admin/Search.ashx" ) %>' });
});
</script>
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="Server">
Enter search term:
<asp:TextBox ID="txtSearch" runat="server" />
</asp:Content>
Handler
C#
<%@ WebHandler Language="C#" Class="Search" %>
using System;
using System.Web;
using System.Data.SqlClient;
using System.Configuration;
using System.Collections.Generic;
using System.Web.Script.Serialization;
public class Search : IHttpHandler
{
public void ProcessRequest(HttpContext context)
{
string prefixText = context.Request.QueryString["term"];
using (SqlConnection conn = new SqlConnection())
{
conn.ConnectionString = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
using (SqlCommand cmd = new SqlCommand())
{
cmd.CommandText = "select ContactName from Customers where ContactName like @SearchText + '%'";
cmd.Parameters.AddWithValue("@SearchText", prefixText);
cmd.Connection = conn;
List<string> customers = new List<string>();
conn.Open();
using (SqlDataReader sdr = cmd.ExecuteReader())
{
while (sdr.Read())
{
customers.Add(sdr["ContactName"].ToString());
}
}
conn.Close();
context.Response.Write(new JavaScriptSerializer().Serialize(customers));
}
}
}
public bool IsReusable
{
get
{
return false;
}
}
}
VB.Net
<%@ WebHandler Language="VB" Class="Search" %>
Imports System.Web
Imports System.Data.SqlClient
Imports System.Configuration
Imports System.Text
Imports System.Collections.Generic
Imports System.Web.Script.Serialization
Public Class Search : Implements IHttpHandler
Public Sub ProcessRequest(ByVal context As HttpContext) Implements IHttpHandler.ProcessRequest
Dim prefixText As String = context.Request.QueryString("term")
Using conn As New SqlConnection()
conn.ConnectionString = ConfigurationManager.ConnectionStrings("constr").ConnectionString
Using cmd As New SqlCommand()
cmd.CommandText = "select ContactName from Customers where ContactName like @SearchText + '%'"
cmd.Parameters.AddWithValue("@SearchText", prefixText)
cmd.Connection = conn
Dim customers As New List(Of String)()
conn.Open()
Using sdr As SqlDataReader = cmd.ExecuteReader()
While sdr.Read()
customers.Add(sdr("ContactName").ToString())
End While
End Using
conn.Close()
context.Response.Write(New JavaScriptSerializer().Serialize(customers))
End Using
End Using
End Sub
Public ReadOnly Property IsReusable() As Boolean Implements IHttpHandler.IsReusable
Get
Return False
End Get
End Property
End Class
Screenshot
