Sử dụng jQuery AutoComplete & SQL Server trong ASP.Net

By Unknown - Thursday, July 9, 2015 - No Comments

(jQuery Autocomplete using Web Service in ASP.Net) – Với chức năng nhập thông tin sản phẩm cho đơn hàng để giúp người nhập liệu thao tác nhanh thông thường phần mềm sẽ tự động lấy các thông tin liên quan như: mã, giá, vat… Với những thông tin được điền sẵn trên các Textbox người sử dụng có thể chỉnh sửa lại nếu muốn, còn không sẽ sử dụng nguyên thông tin cũ. Bài viết dưới đây sẽ hướng dẫn các bạn các xây dựng chức năng nhập sản phẩm sử dụng jQuery AutoComplete.

Xem những Video hay dành cho thiếu nhi - Nghe trên Youtube

- B1: Tạo CSDL SQL Customers

- B2: Tạo Bảng Products có cấu trúc phía dưới trong CSDL SQL Server

- B3: Thêm stored procedure trong SQL Server

USE [Customers]

CREATE PROCEDURE [dbo].[Pro_Products_List]

@Keyword nvarchar(250),

@SortField nvarchar(50),

@SortType nvarchar(10)

declare @strSQL nvarchar(1000)

declare @strWhere nvarchar(500)

declare @strOrder nvarchar (50)

set @strSQL= 'Select * from Products'

set @strWhere =' Where 1=1 '

if @Keyword<>''

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

Or ProductName like N''%' +@Keyword+'%'')'

if @SortField=''

Begin

set @strOrder =' Order by ProductName'

End

Else

Begin

set @strOrder =' Order by '+ @SortField + ' '+ @SortType

End

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

- B4: Tạo Project trong Microsoft Visual Studio 2010
Trong Visual Studio tạo thư mục Common và 1 Class có tên: Utility trong thư mục vừa tạo. 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 AutocompleteUsingWebService

{

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; }

}

VB.NET Code

Imports System.Data.SqlClient

Imports System.Data

Namespace AutocompleteUsingWebService

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

End Namespace

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

- B5: Tạo file Service.asmx trong Project

- B6: Mở file Service.asmx và chỉnh sửa mã

<%@ WebService Language="VB" CodeBehind="~/Common/Service.vb" Class="Service" %>

- B7: Trong thư mục Common tạo file Service.vb

- B8: Nhập Code cho file Service.vb

C# Code

using System.Collections.Generic;

using System.Data.SqlClient;

using System.Web.Services;

using AutocompleteUsingWebService;

using System.Data;

[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 {

[WebMethod]

public string[] ListProducts(string keyword)

{

List<string> Products = new List<string>();

SqlDataProvider objSQL = new SqlDataProvider();

DataTable objBind = objSQL.FillTable("Pro_Products_List", new ObjectPara("@Keyword", keyword.Trim()), new ObjectPara("@SortField", "CreatedDate"), new ObjectPara("@SortType", "DESC"));

if ((objBind != null))

{

foreach (DataRow row in objBind.Rows)

{

if ((row != null))

{

//Code-Name-Price-Tax

Products.Add(string.Format("{0}//{1}//{2}//{3}//{4}", row["ProductName"], row["ProductID"], row["ProductCode"], row["UnitPrice"], row["VAT"]));

}

return Products.ToArray();

}

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 AutocompleteUsingWebService

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

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

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

<ScriptService()> _

Public Class Service

Inherits System.Web.Services.WebService

<WebMethod()> _

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

Public Function ListProducts(ByVal keyword As String) As String()

Dim Products As New List(Of String)()

Dim objSQL As New SqlDataProvider

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

New ObjectPara("@SortField", "CreatedDate"), _

New ObjectPara("@SortType", "DESC"))

If Not objBind Is Nothing Then

For Each row As DataRow In objBind.Rows

If Not row Is Nothing Then

If Not IsDBNull(row("ProductID")) And Not IsDBNull(row("ProductName")) Then

'Code-Name-Price-Tax

Products.Add(String.Format("{0}//{1}//{2}//{3}//{4}", row("ProductName"), row("ProductID"), row("ProductCode"), row("UnitPrice"), row("VAT")))

End If

Return Products.ToArray()

End Function

End Class

- B9: Mở file Site.Master dạng HTML và bổ xung đoạn mã phía dưới trong thẻ Head

- B10: Mở file Default.aspx dưới dạng HTML và nhập mã HTML

<%@ Page Title="Multi Value jQuery Autocomplete Using WebService in Asp.net" Language="vb" MasterPageFile="~/Site.Master" AutoEventWireup="false" EnableEventValidation= "false" CodeBehind="Default.aspx.vb" Inherits="AutocompleteUsingWebService._Default" %>

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

function pageLoad() {

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

source: function (request, response) {

$.ajax({

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

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

dataType: "json",

type: "POST",

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

success: function (data) {

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

return {

label: item.split('//')[0],

val1: item.split('//')[1],

val2: item.split('//')[2],

val3: item.split('//')[3],

val4: item.split('//')[4]

}

}))

error: function (response) {

alert(response.responseText);

failure: function (response) {

alert(response.responseText);

}

});

select: function (e, i) {

$("#<%=hfProductID.ClientID %>").val(i.item.val1);

$("#<%=txtProductCode.ClientID %>").val(i.item.val2);

$("#<%=txtUnitPrice.ClientID %>").val(i.item.val3);

$("#<%=txtTax.ClientID %>").val(i.item.val4);

$("#<%=txtQuantity.ClientID %>").val(1);

minLength: 1

});

};

</script>

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

</asp:ScriptManager>

<h3>

jQuery Autocomplete Using WebService in Asp.net

</h3>

<asp:UpdatePanel ID="updatePanel" runat="server" UpdateMode="Conditional">

<thead>

<tr>

<asp:Label ID="plProductCode" runat="server">ProductCode</asp:Label>

</th>

<asp:Label ID="plProductName" runat="server">ProductName</asp:Label>

</th>

<asp:Label ID="plUnitPrice" runat="server">UnitPrice</asp:Label>

</th>

<asp:Label ID="plQuantity" runat="server">Quantity</asp:Label>

</th>

<asp:Label ID="plTax" runat="server">Tax (%)</asp:Label>

</th>

</tr>

</thead>

<tbody>

<tr>

<asp:TextBox ID="txtProductCode" onkeydown="javascript:return false;" CssClass="form-control" runat="server" Width="120px"></asp:TextBox>

</td>

<asp:TextBox ID="txtProductName" CssClass="form-control" runat="server" Width="350px"></asp:TextBox>

<asp:RequiredFieldValidator ID="valProductName" runat="server" ControlToValidate="txtProductName" Display="dynamic" resourcekey="valProductName"></asp:RequiredFieldValidator>

<asp:HiddenField ID="hfProductID" runat="server" />

</td>

<asp:TextBox ID="txtUnitPrice" CssClass="form-control" runat="server" Width="140px"></asp:TextBox>

</td>

<asp:TextBox ID="txtQuantity" CssClass="form-control" runat="server" Width="80px"></asp:TextBox>

</td>

<asp:TextBox ID="txtTax" CssClass="form-control" runat="server" Width="80px"></asp:TextBox>

</td>

</tr>

</tbody>

</table>

</ContentTemplate>

</asp:UpdatePanel>

</asp:Content>

- B11: Viết Code cho file Default.aspx

C# Code

//Visit http://www.laptrinhdotnet.com for more ASP.NET Tutorials

using Microsoft.VisualBasic;

using System;

using System.Collections;

using System.Collections.Generic;

using System.Data;

using System.Diagnostics;

using System.Web.UI.WebControls;

namespace AutocompleteUsingWebService

{

public partial class _Default : System.Web.UI.Page

{

#region "Event Handles"

protected void Page_Load(object sender, System.EventArgs e)

{

try

{

if (!IsPostBack)

{

txtUnitPrice.Style["text-align"] = "right";

txtQuantity.Style["text-align"] = "right";

txtTax.Style["text-align"] = "right";

}

catch

{

}

#endregion

}

VB.NET Code

'Visit http://www.laptrinhdotnet.com for more ASP.NET Tutorials

Namespace AutocompleteUsingWebService

Public Class _Default

Inherits System.Web.UI.Page

#Region "Event Handles"

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

Try

If Not IsPostBack Then

txtUnitPrice.Style("text-align") = "right"

txtQuantity.Style("text-align") = "right"

txtTax.Style("text-align") = "right"

End If

Catch ex As Exception

End Try

End Sub

#End Region

End Class

End Namespace

Bây giờ chạy Project bạn sẽ có kết quả như ảnh phía dưới. Mỗi khi chọn 1 sản phẩm thông tin liên quan đến sản phẩm như: Mã, Giá, Thuế sẽ tự động được lấy và điền vào Textbox.