Introduction:
In this article I will explain how to implement jquery autocomplete textbox with webservice in asp.net.
In this article I will explain how to implement jquery autocomplete textbox with webservice in asp.net.
Description:
In previous articles I explained JQuery autocomplete textbox example, Ajax autocomplete extender example and many articles in JQuery using asp.net. In previous explained JQuery autocomplete textbox sample article I used page methods directly calling from the page because of that it’s not possible to use that automcomplete functionality in master pages. We can solve this problem by create webservice and use that service to get data from database in asp.net.
To implement this concept first we need to design table in database to save user details in database.
In previous articles I explained JQuery autocomplete textbox example, Ajax autocomplete extender example and many articles in JQuery using asp.net. In previous explained JQuery autocomplete textbox sample article I used page methods directly calling from the page because of that it’s not possible to use that automcomplete functionality in master pages. We can solve this problem by create webservice and use that service to get data from database in asp.net.
To implement this concept first we need to design table in database to save user details in database.
Column Name
|
Data Type
|
Allow Nulls
|
UserId
|
int(set identity property=true)
|
No
|
UserName
|
varchar(50)
|
Yes
|
Location
|
nvarchar(max)
|
Yes
|
After completion table design enter some of user details in database to work for our sample.
Once table creation complete write the following code in aspx page
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>AutoComplete Textbox with webservice using jQuery</title>
<link href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.1/themes/base/jquery-ui.css"rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.1/jquery-ui.min.js"></script>
<script type="text/javascript">
$(document).ready(function() {
SearchText();
});
function SearchText() {
$(".autosuggest").autocomplete({
source: function(request, response) {
$.ajax({
type: "POST",
contentType: "application/json; charset=utf-8",
url: "AutoCompleteService.asmx/GetAutoCompleteData",
data: "{'username':'" + document.getElementById('txtSearch').value + "'}",
dataType: "json",
success: function(data) {
response(data.d);
},
error: function(result) {
alert("Error");
}
});
}
});
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div class="demo">
<div class="ui-widget">
<label for="tbAuto">Enter UserName: </label>
<input type="text" id="txtSearch" class="autosuggest" />
</div>
</form>
</body>
</html>
|
If you observe above code in header section I added some of script and css files by using those files we have a chance to display auto complete text with css style and I mentioned url field as “AutoCompleteService.asmx/GetAutoCompleteData” this mean we are calling GetAutoCompleteDatamethod from AutoCompleteService.asmx webservice.
To creat this webservice right click on your application >> Select Add New Item >> select Web Service>> Give name of service AutoCompleteService.asmx and click OK
 |
Once webservice created open code behind file and write the following code
C# Code
using System.Collections.Generic;
using System.Data.SqlClient;
using System.Web.Services;
/// <summary>
/// Summary description for AutoCompleteService
/// </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 AutoCompleteService : System.Web.Services.WebService {
[WebMethod]
public List<string> GetAutoCompleteData(string username)
{
List<string> result = new List<string>();
using (SqlConnection con = new SqlConnection("Data Source=SureshDasari;Integrated Security=true;Initial Catalog=MySampleDB"))
{
using (SqlCommand cmd = new SqlCommand("select DISTINCT UserName from UserInformation where UserName LIKE '%'+@SearchText+'%'", con))
{
con.Open();
cmd.Parameters.AddWithValue("@SearchText", username);
SqlDataReader dr = cmd.ExecuteReader();
while (dr.Read())
{
result.Add(dr["UserName"].ToString());
}
return result;
}
}
}
}
|
VB.NET Code
Imports System.Collections.Generic
Imports System.Data.SqlClient
Imports System.Web.Services
''' <summary>
''' Summary description for AutoCompleteService
''' </summary>
' To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line.
<WebService([Namespace]:="http://tempuri.org/")> _
<WebServiceBinding(ConformsTo:=WsiProfiles.BasicProfile1_1)> _
<System.Web.Script.Services.ScriptService()> _
Public Class AutoCompleteService
Inherits System.Web.Services.WebService
<WebMethod()> _
Public Function GetAutoCompleteData(ByVal username As String) As List(Of String)
Dim result As New List(Of String)()
Using con As New SqlConnection("Data Source=SureshDasari;Integrated Security=true;Initial Catalog=MySampleDB")
Using cmd As New SqlCommand("select DISTINCT UserName from UserInformation where UserName LIKE '%'+@SearchText+'%'", con)
con.Open()
cmd.Parameters.AddWithValue("@SearchText", username)
Dim dr As SqlDataReader = cmd.ExecuteReader()
While dr.Read()
result.Add(dr("UserName").ToString())
End While
Return result
End Using
End Using
End Function
End Class
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Demo
 |
Download sample code attached