Tạo Dropdown Menu nâng cao trong Asp.Net Gridview

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(Cách tạo Action Menu nâng cao trong Gridview) – Trong bài viết "Tạo Dropdown Menu trong Asp.Net Gridview", thủ thuật tin học đã giới thiệu với các bạn cách tạo Menu trong Gridview. Với bài viết trước danh sách Menu được tạo cố định, nhưng bài viết này thông tin Menu sẽ được lấy từ trong Database SQL Server như: tên Menu, đường dẫn, đối số….

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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	AccDesc	nvarchar(1500)
10	CreatedDate	datetime
11	ModifiedDate	datetime

- B3: Nhập dữ liệu cho bảng Accounts

- B4: Tạo Bảng ActionMenu có cấu trúc phía dưới

STT	Tên trường	Kiểu trường	Ghi chú
1	MenuID	Int	Trường tự tăng
2	MenuOrder	Int
3	MenuName	nvarchar(250)
4	CommandArgument	nvarchar(250)
5	URL	nvarchar(250)
6	IsVisible	bit

- B5: Nhập dữ liệu cho bảng ActionMenu

- B6: Tạo 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_Menu_List]

@Keyword nvarchar(250),

@SortField nvarchar(50),

@IsVisible bit

declare @strSQL nvarchar(1000)

declare @strWhere nvarchar(500)

declare @strOrder nvarchar (50)

set @strSQL= 'Select * from ActionMenu'

set @strWhere =' Where 1=1 '

if @Keyword<>''

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

if @IsVisible=0

set @strWhere= @strWhere +' and (IsVisible=0 Or IsVisible Is Null)'

if @IsVisible=1

set @strWhere= @strWhere +' and (IsVisible=1)'

if @SortField=''

Begin

set @strOrder =' Order by MenuOrder'

End

Else

Begin

set @strOrder =' Order by ' + @SortField

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

- B7: 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 DropdownMenuGridView

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

- B8: Tạo thư mục Js trong Project

- B9: Download các file css và js tại đây, copy file jquery.dropdown.css vào thư mục Styles

- B10: Copy file js jquery.dropdown.js vào thư mục js

- B11: Copy file action.gif vào thư mục Images Project

- B12: Tạo các file Edit.aspx, View.aspx trong Project

- B13: Tạo thư mục UserControls, tạo file ActionMenu.ascx trong thư mục vừa tạo

- B14: Mở file ActionMenu. ascx dạng HTML và nhập mã HTML

<%@ Control Language="vb" AutoEventWireup="false" CodeBehind="ActionMenu.ascx.vb" Inherits="DropdownMenuGridView.UserControls.ActionMenu" %>

<asp:Label ID="lblItemID" Visible="false" runat="server"/>

<asp:DataList id="lstMenu" cellspacing="0" cellpadding="0" RepeatDirection="vertical" Runat="Server" Width="100%" EnableViewState="false">

<tr>

<td>

<asp:HyperLink id="lnkMenu" Text='<%# Eval("MenuName") %>' runat="server" />

</td>

</tr>

</table>

</ItemTemplate>

</asp:DataList>

</div>

- B15: Viết Code cho file ActionMenu.ascx

Namespace DropdownMenuGridView.UserControls

Partial Class ActionMenu

Inherits System.Web.UI.UserControl

#Region "Private Members"

Private ItemID As Integer

#End Region

#Region "Event Click"

Public Event ItemCommand(ByVal source As Object, ByVal e As System.Web.UI.WebControls.DataListCommandEventArgs)

#End Region

#Region "Datalist Methods"

Private Sub lstMenu_ItemCommand(ByVal source As Object, ByVal e As System.Web.UI.WebControls.DataListCommandEventArgs) Handles lstMenu.ItemCommand

RaiseEvent ItemCommand(source, e)

End Sub

Private Sub lstMenu_ItemDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.DataListItemEventArgs) Handles lstMenu.ItemDataBound

If (e.Item.ItemType = ListItemType.Item Or e.Item.ItemType = ListItemType.AlternatingItem) Then

Dim MenuID As Integer = DataBinder.Eval(e.Item.DataItem, "MenuID")

Dim MenuName As String = DataBinder.Eval(e.Item.DataItem, "MenuName")

Dim URL As String = DataBinder.Eval(e.Item.DataItem, "URL")

Dim lnkMenu As HyperLink = DirectCast(e.Item.FindControl("lnkMenu"), HyperLink)

Dim CommandArgument As String = ""

If lblItemID.Text <> "" Then

CommandArgument = lblItemID.Text

End If

If lblItemID.Text <> "" Then

ItemID = lblItemID.Text

End If

If Not lnkMenu Is Nothing Then

lnkMenu.NavigateUrl = String.Format(URL, ItemID)

End If

End Sub

#End Region

#Region "Pulbic Methods"

Private Function BindData() As DataTable

Dim objSQL As New SqlDataProvider

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

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

New ObjectPara("@IsVisible", 1))

Return objBind

End Function

Public Sub BindMenu(ByVal ItemID As Integer)

Dim objBind As New DataTable

objBind = BindData()

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

lblItemID.Text = ItemID

End If

If Not objBind Is Nothing Then

If objBind.Rows.Count > 0 Then

lstMenu.DataSource = objBind

lstMenu.DataBind()

End If

End Sub

#End Region

End Class

End Namespace

- B16: Mở file Default.aspxdưới dạng HTML và nhập mã HTML

<%@ Page Title="Dropdown Menu in Asp.Net GridView" Language="vb" MasterPageFile="~/Site.Master" AutoEventWireup="false" EnableEventValidation= "false" CodeBehind="Default.aspx.vb" Inherits="DropdownMenuGridView._Default" %>

<%@ Register TagPrefix="ActionMenu" TagName="Menu" Src="~/UserControls/ActionMenu.ascx"%>

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

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

</asp:ScriptManager>

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

<h3>

Dropdown Menu in Asp.Net GridView

</h3>

<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="12"

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

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

<asp:TemplateField HeaderText = "Number">

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

<asp:Label ID="lblItemID" Text='<%# Eval("AccountID") %>' Visible="false" runat="server"></asp:Label>

</ItemTemplate>

</asp:TemplateField>

<asp:TemplateField HeaderText="AccountCode">

<asp:Label ID="lblAccountCode" Text='<%# Eval("AccountCode") %>' runat="server"></asp:Label>

<asp:Image ID="imgActionMenu" runat="server"></asp:Image>

</span>

<ActionMenu:Menu ID="ucActionMenu" runat="server" />

</div>

</ItemTemplate>

</asp:TemplateField>

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

<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>

- B17: Viết Code cho file Default.aspx

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

Imports System.Data.SqlClient

Namespace DropdownMenuGridView

Public Class _Default

Inherits System.Web.UI.Page

#Region "Private Members"

#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 ItemID As Integer = DataBinder.Eval(e.Row.DataItem, "AccountID")

Dim ctlActionMenu As DropdownMenuGridView.UserControls.ActionMenu = CType(e.Row.FindControl("ucActionMenu"), DropdownMenuGridView.UserControls.ActionMenu)

If Not ctlActionMenu Is Nothing Then

With ctlActionMenu

.BindMenu(ItemID)

End With

End If

Dim imgActionMenu As Image = CType(e.Row.FindControl("imgActionMenu"), Image)

If Not imgActionMenu Is Nothing Then

imgActionMenu.ImageUrl = Page.ResolveUrl("Images\action.gif")

End If

Dim ucdropdownmenu As HtmlGenericControl = DirectCast(e.Row.FindControl("ucdropdownmenu"), HtmlGenericControl)

If Not ucdropdownmenu Is Nothing Then

ucdropdownmenu.ID &= "_" & ItemID

End If

Dim spActionMenu As HtmlGenericControl = DirectCast(e.Row.FindControl("spActionMenu"), HtmlGenericControl)

If Not spActionMenu Is Nothing Then

spActionMenu.Attributes.Add("data-dropdown", "#" & ucdropdownmenu.ClientID)

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 "Event Handles"

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

Try

If Page.IsPostBack = False Then

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

Sau khi chạy Project, khi click vào các giá trị ở cột AccountCode Menu chức năng xuất hiện và người dùng có thể lựa chọn chức năng để sử dụng.

Chúc các bạn thành công!

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