Nhúng Control AJAX Rating vào GridView TemplateField

By Unknown - Thursday, June 18, 2015 - No Comments

(Sử dụng Control AJAX Rating vào GridView TemplateField trong Asp.net) – Để đánh giá một khách hàng ở một mức độ nào đó, thay vì viết mô tả người sử dụng mong muốn có một công cụ trực quan đó là sử dụng số hình ảnh sao. Khi nhìn vào số lượng sao người sử dụng có thể biết được ngay mức độ đánh giá của từng khách hàng. Bài viết dưới đây sẽ hướng dẫn các bạn cách nhúng Control AJAX Rating vào Gridview và có thể đánh giá trực tiếp ngay trên Gridview.

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- B1: Tạo CSDL Customers trong SQL Server

- B2: Tạo Bảng Accounts có cấu trúc phía dưới

STT	Tên trường	Kiểu trường	Ghi chú
1	AccountID	Int	Trường tự tăng
2	AccountCode	nvarchar(25)
3	AccName	nvarchar(250)
4	AccAddress	nvarchar(250)
5	AccPhone	nvarchar(50)
6	AccFAX	nvarchar(50)
7	AccEmail	nvarchar(50)
8	AccWebsite	nvarchar(150)
9	Rating	nvarchar(150)
10	AccDesc	nvarchar(1500)
11	CreatedDate	datetime
12	ModifiedDate	datetime

- B3: Nhập dữ liệu cho bảng Accounts

- B4: Tạo các stored procedure trong SQL Server

USE [Customers]

CREATE PROCEDURE [dbo].[Pro_Accounts_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 Accounts'

set @strWhere =' Where 1=1 '

if @Keyword<>''

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

Or AccName like N''%' +@Keyword+'%'' Or AccAddress like N''%' +@Keyword+'%''

Or AccPhone like N''%' +@Keyword+'%'' Or AccFAX like N''%' +@Keyword+'%''

Or AccEmail like N''%' +@Keyword+'%'' Or AccWebsite like N''%' +@Keyword+'%'')'

if @SortField='CreatedDate'

Begin

set @strOrder =' Order by CreatedDate'

End

Else

Begin

set @strOrder =' Order by AccName'

End

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

print @strSQL

exec sp_executesql @strSQL

CREATE PROCEDURE [dbo].[Pro_Accounts_UpdateRating]

@ItemID int,

@Rating int

UPDATE Accounts SET

Rating = @Rating

WHERE

AccountID = @ItemID

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.

Imports System.Data.SqlClient

Imports System.Data

Namespace AJAXRatingControInGridView

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 sql As String) As DataTable

Try

Dim tb As New DataTable

Dim adap As New SqlDataAdapter(sql, _connectionString)

adap.Fill(tb)

Return tb

Catch ex As Exception

Return Nothing

End Try

End Function

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

Public Function RunSQL(ByVal ProcName As String, ByVal ParamArray Para() As ObjectPara) As Object

Try

Dim _cnn As New SqlConnection(_connectionString)

_cnn.Open()

Dim cmd As New SqlCommand(ProcName, _cnn)

cmd.CommandType = CommandType.StoredProcedure

For Each p As ObjectPara In Para

cmd.Parameters.Add(New SqlParameter(p.Name, p.Value))

Return cmd.ExecuteScalar

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

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

- B6: Download thư viện AjaxControlToolkit tại địa chỉ: Download

- B7: Giải nén AjaxControlToolkit.Binary.NET4, và References Ajaxcontroltoolkit.dll trong thư mục vừa giải nén vào Project.

- B8: Download các file Ảnh tại đây và Copy các file Star.gif, WaitingStar.gif, FilledStar.gif vào thư mục Images trong thư mục Styles

- B9: Mở file Site.css nhập thêm đoạn Code phía dưới

.Star

{

height: 17px;

width: 17px;

}

.WaitingStar

{

height: 17px;

width: 17px;

}

.FilledStar

{

height: 17px;

width: 17px;

}

- B10: Mở file Default.aspxdưới dạng HTML và bổ xung Control

<%@ Page Title="AJAX Rating Control Inside GridView in ASP.Net" Language="vb" MasterPageFile="~/Site.Master" AutoEventWireup="false" EnableEventValidation= "false" CodeBehind="Default.aspx.vb" Inherits="AJAXRatingControInGridView._Default" %>

<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc1" %>

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

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

</asp:ScriptManager>

<h1>

AJAX Rating Control Inside GridView in ASP.Net

</h1>

<br />

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

<tr>

<td>

</td>

<asp:Label ID="plKeyword" runat="server" Text="Keyword"></asp:Label>

<asp:TextBox ID="txtSearch" CssClass="form-control" ToolTip="Enter Keyword" runat="server" width="200px"></asp:TextBox>

<asp:ImageButton ID="cmdQuickSearch" runat="server" causesvalidation="false" imageurl="~/images/icon_search.gif"></asp:ImageButton>

</td>

</tr>

<asp:Label ID="lblMessage" runat="server" Text="No Data"></asp:Label>

</td>

</tr>

<tr>

<asp:GridView ID="grvObject" runat="server" AllowPaging="true" PageSize="8"

CssClass="GridStyle" BorderColor="#cbcbcb" BorderStyle="solid"

BorderWidth="1" AutoGenerateColumns="false" DataKeyNames="AccountID" width="100%">

<asp:TemplateField HeaderText = "Number">

<asp:Label ID="lblRowNumber" Text='<%# Container.DataItemIndex + 1 %>' runat="server" />

</ItemTemplate>

</asp:TemplateField>

<asp:BoundField ItemStyle-Width="10%" DataField="AccountCode" HeaderText="AccountCode" />

<asp:BoundField ItemStyle-Width="15%" DataField="AccName" HeaderText="AccountName" />

<asp:TemplateField HeaderText="Ratings">

<cc1:Rating ID="ucRating" AutoPostBack="true" OnChanged="OnRatingChanged" runat="server"

StarCssClass="Star" WaitingStarCssClass="WaitingStar" EmptyStarCssClass="Star" FilledStarCssClass="FilledStar">

</cc1:Rating>

</ItemTemplate>

</asp:TemplateField>

<asp:BoundField ItemStyle-Width="10%" DataField="AccPhone" HeaderText="Phone" />

<asp:BoundField ItemStyle-Width="10%" DataField="AccFAX" HeaderText="FAX" />

<asp:BoundField ItemStyle-Width="15%" DataField="AccEmail" HeaderText="Email" />

</Columns>

</asp:GridView>

</td>

</tr>

</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.IO;

using System.Diagnostics;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.Services;

using System.Web.Script.Services;

using AjaxControlToolkit;

namespace AJAXRatingControInGridView

{

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

{

#region "Private Methods"

private void UpdateRating(int ItemID, int iRating)

{

SqlDataProvider objSQL = new SqlDataProvider();

//Update Rating

objSQL.RunSQL("Pro_Accounts_UpdateRating", new ObjectPara("@ItemID", ItemID), new ObjectPara("@Rating", iRating));

}

#endregion

#region "Bind Data"

private void BindAccount()

{

DataTable objBind = new DataTable();

objBind = BindData();

if (objBind != null)

{

if (objBind.Rows.Count > 0)

{

grvObject.DataSource = objBind;

grvObject.DataBind();

trMessage.Visible = false;

grvObject.Visible = true;

}

else

{

trMessage.Visible = true;

grvObject.Visible = false;

}

updatePanel.Update();

}

private DataTable BindData()

{

SqlDataProvider objSQL = new SqlDataProvider();

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

return objBind;

}

#endregion

#region "GridView Methods"

protected void grvObject_RowDataBound(object sender, GridViewRowEventArgs e)

{

if (e.Row.RowType == DataControlRowType.DataRow)

{

int iRating = -1;

if (!object.ReferenceEquals(DataBinder.Eval(e.Row.DataItem, "Rating"), System.DBNull.Value))

{

iRating =Convert.ToInt32(DataBinder.Eval(e.Row.DataItem, "Rating"));

}

Rating ucRating = (Rating)e.Row.FindControl("ucRating");

if (ucRating != null)

{

if (iRating != -1 & iRating != 0)

{

ucRating.CurrentRating = iRating;

}

else

{

ucRating.CurrentRating = 0;

}

protected void grvObject_PageIndexChanging(object sender, System.Web.UI.WebControls.GridViewPageEventArgs e)

{

grvObject.PageIndex = e.NewPageIndex;

BindAccount();

}

#endregion

#region "Rating"

protected void OnRatingChanged(object sender, RatingEventArgs e)

{

int iRating =Convert.ToInt32(e.Value);

int rowIndex = ((sender as Rating).NamingContainer as GridViewRow).RowIndex;

int ItemID = Convert.ToInt32(grvObject.DataKeys[rowIndex].Value);

if (ItemID != -1 & iRating != -1)

{

//Update Rating

UpdateRating(ItemID, iRating);

BindAccount();

}

#endregion

#region "Event Handles"

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

{

try

{

if (!IsPostBack)

{

//Default Submit Button

Page.Form.DefaultButton = cmdQuickSearch.UniqueID;

BindAccount();

}

catch

{

}

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

{

BindAccount();

}

#endregion

}

VB.NET Code

Imports AjaxControlToolkit

Namespace AJAXRatingControInGridView

Public Class _Default

Inherits System.Web.UI.Page

#Region "Private Methods"

Private Sub UpdateRating(ByVal ItemID As Integer, ByVal iRating As Integer)

Dim objSQL As New SqlDataProvider

'Update Rating

objSQL.RunSQL("Pro_Accounts_UpdateRating", New ObjectPara("@ItemID", ItemID), _

New ObjectPara("@Rating", iRating))

End Sub

#End Region

#Region "Bind Data"

Private Sub BindAccount()

Dim objBind As New DataTable

objBind = BindData()

If Not objBind Is Nothing Then

If objBind.Rows.Count > 0 Then

grvObject.DataSource = objBind

grvObject.DataBind()

trMessage.Visible = False

grvObject.Visible = True

Else

trMessage.Visible = True

grvObject.Visible = False

End If

updatePanel.Update()

End If

End Sub

Private Function BindData() As DataTable

Dim objSQL As New SqlDataProvider

Dim objBind As DataTable = objSQL.FillTable("Pro_Accounts_List", New ObjectPara("@Keyword", txtSearch.Text.Trim), _

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

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

Return objBind

End Function

#End Region

#Region "GridView Methods"

Private Sub grvObject_RowDataBound(ByVal sender As Object, ByVal e As GridViewRowEventArgs) Handles grvObject.RowDataBound

If (e.Row.RowType = DataControlRowType.DataRow) Then

Dim iRating As Integer = -1

If Not DataBinder.Eval(e.Row.DataItem, "Rating") Is System.DBNull.Value Then

iRating = DataBinder.Eval(e.Row.DataItem, "Rating")

End If

Dim ucRating As Rating = CType(e.Row.FindControl("ucRating"), Rating)

If ucRating IsNot Nothing Then

If iRating <> -1 And iRating <> 0 Then

ucRating.CurrentRating = iRating

Else

ucRating.CurrentRating = 0

End If

End Sub

Private Sub grvObject_PageIndexChanging(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewPageEventArgs) Handles grvObject.PageIndexChanging

grvObject.PageIndex = e.NewPageIndex

BindAccount()

End Sub

#End Region

#Region "Rating"

Protected Sub OnRatingChanged(ByVal sender As Object, ByVal e As RatingEventArgs)

Dim iRating As Integer = e.Value

Dim rowIndex As Integer = TryCast(TryCast(sender, Rating).NamingContainer, GridViewRow).RowIndex

Dim ItemID As Integer = Convert.ToInt32(grvObject.DataKeys(rowIndex).Value)

If ItemID <> -1 And iRating <> -1 Then

'Update Rating

UpdateRating(ItemID, iRating)

BindAccount()

End If

End Sub

#End Region

#Region "Event Handles"

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

Try

If Page.IsPostBack = False Then

'Default Submit Button

Page.Form.DefaultButton = cmdQuickSearch.UniqueID

BindAccount()

End If

Catch ex As Exception

End Try

End Sub

Private Sub cmdQuickSearch_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles cmdQuickSearch.Click

BindAccount()

End Sub

#End Region

End Class

End Namespace

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