How to implement jQuery Autocomplete Textbox with Image in ASP.NET

By Unknown - Sunday, September 13, 2015 - No Comments

(jQuery Autocomplete Textbox with Image using Web Service in ASP.Net) – Autocomplete là một tính năng tuyệt vời giúp người sử dụng tiết kiệm rất nhiều thời gian trong việc tìm kiếm. Chỉ cần nhập vào các từ khóa bạn có thể lựa chọn những mục phù hợp trong một danh sách các kết quả. Bài viết dưới đây sẽ hướng dẫn cách sử dụng Auto Complete, khi người dùng tìm kiếm các kết quả sẽ xuất hiện đồng thời hình ảnh đó sẽ gắn với từng kết quả giống như khi sử dụng tìm kiếm trong Facebook.

- B1: Tạo CSDL Customers trong SQL Server

- B2: Tạo Bảng Contacts có cấu trúc phía dưới

STT	Tên trường	Kiểu trường	Ghi chú
1	ContactID	Int	Trường tự tăng
2	ContactCode	nvarchar(25)
3	ContactName	nvarchar(250)
4	Sex	bit
5	Birthdate	datetime
6	Address	nvarchar(250)
7	Mobille	nvarchar(50)
8	Email	nvarchar(150)
9	ContactImage	nvarchar(150)
10	CreatedDate	datetime
11	ModifiedDate	datetime

- B3: Nhập dữ liệu cho bảng Customers

- B4: Tạo stored procedure trong SQL Server

CREATE PROCEDURE [dbo].[Pro_Contacts_List]

@Keyword nvarchar(250)

declare @strSQL nvarchar(1000)

declare @strWhere nvarchar(500)

declare @strOrder nvarchar (50)

set @strSQL= 'Select * from Contacts'

set @strWhere =' Where 1=1 '

if @Keyword<>''

set @strWhere= @strWhere +' And (ContactCode like N''%' +@Keyword+'%''

Or ContactName like N''%' +@Keyword+'%'' Or Address like N''%' +@Keyword+'%''

Or Mobille like N''%' +@Keyword+'%'' Or Email like N''%' +@Keyword+'%'')'

set @strOrder =' Order by ContactName'

set @strSQL=@strSQL+@strWhere+@strOrder

print @strSQL

exec sp_executesql @strSQL

Bạn có thể tải về bảng cơ sở dữ liệu SQL bằng cách nhấn vào liên kết tải về dưới đây

- B5: Tạo Project trong Microsoft Visual Studio 2010
Trong Visual Studio tạo 1 Class có tên: Utility và nhập đoạn Code phía dưới cho Class này.

C# Code

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Data.SqlClient;

using System.Data;

using System.Configuration;

namespace AddImageinjQueryAutoComplete

{

public class SqlDataProvider

{

#region "Membres Prives"

private string _connectionString;

#endregion

#region "Constructeurs"

public SqlDataProvider()

{

try

{

_connectionString = ConfigurationManager.ConnectionStrings["SiteSqlServer"].ConnectionString;

}

catch

{

}

#endregion

#region "Proprietes"

public string ConnectionString

{

get { return _connectionString; }

}

#endregion

#region "Functions"

public DataTable FillTable(string ProcName, params ObjectPara[] Para)

{

try

{

DataTable tb = new DataTable();

SqlDataAdapter adap = new SqlDataAdapter(ProcName, _connectionString);

adap.SelectCommand.CommandType = CommandType.StoredProcedure;

if ((Para != null))

{

foreach (ObjectPara p in Para)

{

adap.SelectCommand.Parameters.Add(new SqlParameter(p.Name, p.Value));

}

adap.Fill(tb);

return tb;

}

catch

{

return null;

}

#endregion

}

public class ObjectPara

{

string _name;

object _Value;

public ObjectPara(string Pname, object PValue)

{

_name = Pname;

_Value = PValue;

}

public string Name

{

get { return _name; }

set { _name = value; }

}

public object Value

{

get { return _Value; }

set { _Value = value; }

}

public class ContactsInfo

{

public string ContactID { get; set; }

public string ContactName { get; set; }

public string ContactImage { get; set; }

}

VB.NET Code

Imports System.Data.SqlClient

Imports System.Data

Namespace AddImageinjQueryAutoComplete

Public Class SqlDataProvider

#Region "Membres Prives"

Shared _IsError As Boolean = False

Private _connectionString As String

#End Region

#Region "Constructeurs"

Public Sub New()

Try

_connectionString = ConfigurationManager.ConnectionStrings("SiteSqlServer").ConnectionString

_IsError = False

Catch ex As Exception

_IsError = True

End Try

End Sub

#End Region

#Region "Proprietes"

Public ReadOnly Property ConnectionString() As String

Get

Return _connectionString

End Get

End Property

#End Region

#Region "Functions"

Public Function FillTable(ByVal ProcName As String, ByVal ParamArray Para() As ObjectPara) As DataTable

Try

Dim tb As New DataTable

Dim adap As New SqlDataAdapter(ProcName, _connectionString)

adap.SelectCommand.CommandType = CommandType.StoredProcedure

If Not Para Is Nothing Then

For Each p As ObjectPara In Para

adap.SelectCommand.Parameters.Add(New SqlParameter(p.Name, p.Value))

End If

adap.Fill(tb)

Return tb

Catch ex As Exception

Return Nothing

End Try

End Function

#End Region

End Class

Public Class ObjectPara

Dim _name As String

Dim _Value As Object

Sub New(ByVal Pname As String, ByVal PValue As Object)

_name = Pname

_Value = PValue

End Sub

Public Property Name() As String

Get

Return _name

End Get

Set(ByVal value As String)

_name = value

End Set

End Property

Public Property Value() As Object

Get

Return _Value

End Get

Set(ByVal value As Object)

_Value = value

End Set

End Property

End Class

Public Class ContactsInfo

#Region "Private Members"

Private _ContactID As Integer

Private _ContactName As String

Private _ContactImage As String

#End Region

#Region "Public Properties"

Public Property ContactID() As Integer

Get

Return _ContactID

End Get

Set(ByVal Value As Integer)

_ContactID = Value

End Set

End Property

Public Property ContactName() As String

Get

Return _ContactName

End Get

Set(ByVal Value As String)

_ContactName = Value

End Set

End Property

Public Property ContactImage() As String

Get

Return _ContactImage

End Get

Set(ByVal Value As String)

_ContactImage = Value

End Set

End Property

#End Region

End Class

End Namespace

Chú ý: Thuộc tính SiteSqlServer chính là chuỗi Connect với SQL Server trong file Web.Config

- B6: Download các file ảnh tại đây, Copy ảnh lần lượt vào các thư mục Images

- B7: Tạo file WebService.asmx trong Project

- B8: Viết Code cho file WebService.vb

C# Code

using System;

using System.Collections;

using System.Collections.Generic;

using System.Data;

using System.Web;

using System.Web.Services;

using System.Web.Services.Protocols;

using System.Web.Script.Services;

using System.Data.SqlClient;

using AddImageinjQueryAutoComplete;

namespace AddImageinjQueryAutoComplete

{

[WebService(Namespace = "http://tempuri.org/")]

[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]

[System.ComponentModel.ToolboxItem(false)]

[System.Web.Script.Services.ScriptService]

public class WebService : System.Web.Services.WebService

{

[WebMethod()]

[ScriptMethod(ResponseFormat = ResponseFormat.Json)]

public List<ContactsInfo> ListContacts(string keyword)

{

SqlDataProvider objSQL = new SqlDataProvider();

DataTable objBind = objSQL.FillTable("Pro_Contacts_List", new ObjectPara("@Keyword", keyword));

List<ContactsInfo> BindContacts = new List<ContactsInfo>();

if (objBind != null)

{

foreach (DataRow row in objBind.Rows)

{

ContactsInfo objInfo = new ContactsInfo();

objInfo.ContactID = row["ContactID"].ToString();

objInfo.ContactName = row["ContactName"].ToString();

objInfo.ContactImage = row["ContactImage"].ToString();

BindContacts.Add(objInfo);

}

return BindContacts;

}

VB.NET Code

Imports System.Web

Imports System.Web.Services

Imports System.Web.Services.Protocols

Imports System.Web.Script.Services

Imports System.Data.SqlClient

Imports System.Collections.Generic

Imports AddImageinjQueryAutoComplete

Namespace AddImageinjQueryAutoComplete

<WebService(Namespace:="http://tempuri.org/")> _

<WebServiceBinding(ConformsTo:=WsiProfiles.BasicProfile1_1)> _

<Global.Microsoft.VisualBasic.CompilerServices.DesignerGenerated()> _

<ScriptService()> _

Public Class WebService

Inherits System.Web.Services.WebService

<WebMethod()> _

<ScriptMethod(ResponseFormat:=ResponseFormat.Json)> _

Public Function ListContacts(ByVal keyword As String) As List(Of ContactsInfo)

Dim objSQL As New SqlDataProvider

Dim objBind As DataTable = objSQL.FillTable("Pro_Contacts_List", New ObjectPara("@Keyword", keyword))

Dim BindContacts As New List(Of ContactsInfo)()

If Not objBind Is Nothing Then

For Each row As DataRow In objBind.Rows

Dim objInfo As New ContactsInfo()

With objInfo

.ContactID = row("ContactID").ToString()

.ContactName = row("ContactName").ToString()

.ContactImage = row("ContactImage").ToString()

End With

BindContacts.Add(objInfo)

End If

Return BindContacts

End Function

End Class

End Namespace

- B9: Mở file Default.aspx dưới dạng HTML và nhập mã HTML

<%@ Page Title="How to implement jQuery Autocomplete Textbox with image in ASP.NET" Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="AddImageinjQueryAutoComplete._Default" %>

<asp:Content ID="HeaderContent" runat="server" ContentPlaceHolderID="HeadContent">

function pageLoad() {

$("#<%=txtContactName.ClientID %>").autocomplete({

source: function (request, response) {

$.ajax({

url: '<%=ResolveUrl("~/WebService.asmx/ListContacts") %>',

data: "{'keyword' :'" + request.term + "'}",

dataType: "json",

type: "POST",

contentType: "application/json; charset=utf-8",

success: function (data) {

response($.map(data.d, function (item) {

return {

ContactID: item.ContactID,

ContactName: item.ContactName,

ContactImage: item.ContactImage,

json: item

}

}))

error: function (XMLHttpRequest, textStatus, errorThrown) {

alert(textStatus);

}

});

focus: function (event, ui) {

$('#<%=txtContactName.ClientID%>').val(ui.item.ContactName);

return false;

select: function (event, ui) {

$('#<%=txtContactName.ClientID%>').val(ui.item.ContactName);

return false;

}

}).data("ui-autocomplete")._renderItem = function (ul, item) {

return $("<li>")

.append("<a style='padding-left:40px; background-image:url(" + item.ContactImage + ");" +

"background-repeat:no-repeat;background-position:left center;' >" + item.ContactName + "</a>")

.appendTo(ul);

};

</script>

</asp:Content>

<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">

<asp:ScriptManager ID="ScriptManager1" EnablePageMethods = "true" runat="server">

</asp:ScriptManager>

<h4>

How to implement jQuery Autocomplete textbox with image in ASP.NET

</h4>

</div>

<tr>

<td>

<asp:Label ID="plName" runat="server" Text="Name (*)"></asp:Label>

</td>

<td>

<asp:TextBox ID="txtContactName" CssClass="form-control" runat="server" width="516px"></asp:TextBox>

<asp:RequiredFieldValidator ID="valName" runat="server" ControlToValidate="txtContactName" Display="dynamic" ErrorMessage="Enter Contactount Name"></asp:RequiredFieldValidator>

</td>

</tr>

</table>

</div>

</asp:Content>

Chúc các bạn thành công!

Quang Bình

News Ticker