(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.

Nghe những bài hát đỉnh nhất về Thấy cô giáo - Nghe trên Youtube

- 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 stringConnectionString

{

get { return_connectionString; }

}

#endregion

#region"Functions"

public DataTableFillTable(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 (ObjectParap 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(stringPname, 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 stringContactID { get; set; }

public stringContactName { get; set; }

public stringContactImage { 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 AsString

#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() AsString

Get

Return _connectionString

End Get

End Property

#End Region

#Region "Functions"

Public FunctionFillTable(ByVal ProcName As String, ByVal ParamArrayPara() As ObjectPara) As DataTable

Try

Dim tb AsNew DataTable

Dim adap AsNew SqlDataAdapter(ProcName, _connectionString)

adap.SelectCommand.CommandType = CommandType.StoredProcedure

If NotPara Is NothingThen

For Eachp As ObjectParaIn 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 PropertyName() As String

Get

Return _name

End Get

Set(ByVal value As String)

_name = value

End Set

End Property

Public PropertyValue() 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 AsInteger

Private _ContactName AsString

Private _ContactImage AsString

#End Region

#Region "Public Properties"

Public PropertyContactID() As Integer

Get

Return _ContactID

End Get

Set(ByVal Value As Integer)

_ContactID = Value

End Set

End Property

Public PropertyContactName() As String

Get

Return _ContactName

End Get

Set(ByVal Value As String)

_ContactName = Value

End Set

End Property

Public PropertyContactImage() 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 = newSqlDataProvider();

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

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

if (objBind != null)

{

foreach (DataRowrow 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 FunctionListContacts(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 Eachrow As DataRowIn objBind.Rows

Dim objInfo AsNew 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

<%@ PageTitle="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!

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

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