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Tạo Dropdown Menu trong Asp.Net Gridview

(Cách tạo Action Menu trong Gridview) – Đối với các Gridview người lập trình thường để các nút lệnh trên từng dòng để tiện thực hiện thao tác cho người sử dụng. Nhờ các nút lệnh này mà người dùng sẽ không phải mất thêm nhiều thao tác để thực hiện công việc mình mong muốn. Tuy nhiên khi có nhiều nút lệnh thì Gridview sẽ mất nhiều diện tích cho việc hiển thị dữ liệu. Bài viết dưới đây sẽ hướng dẫn các bạn cách tạo Dropdow Menu trong Gridview, mới Menu này sẽ tiết kiệm rất nhiều không gian, chỉ khi kích vào một vùng nào đó thì lúc này Menu mới xuất hiện.
Xem những Video hay dành cho thiếu nhi - Nghe trên Youtube




Code Example C#, Code Example VB.NET
Code Example C#, Code Example VB.NET




B1: Tạo CSDL Customers trong SQL Server

B2: Tạo Bảng Accounts có cấu trúc phía dưới

STTTên trườngKiểu trườngGhi chú
1AccountIDIntTrường tự tăng
2AccountCodenvarchar(25)
3AccNamenvarchar(250)
4AccAddressnvarchar(250)
5AccPhonenvarchar(50)
6AccFAXnvarchar(50)
7AccEmailnvarchar(50)
8AccWebsitenvarchar(150)
9AccDescnvarchar(1500)
10CreatedDatedatetime
11ModifiedDatedatetime


B3: Nhập dữ liệu cho bảng Accounts

B4: Tạo stored procedure trong SQL Server

USE [Customers]
GO

CREATE PROCEDURE [dbo].[Pro_Accounts_List]
      @Keyword nvarchar(250),
      @SortField nvarchar(50),
      @SortType nvarchar(10)
AS

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

Go

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 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))
                    Next
                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

- B6: Tạo thư mục Js trong Project

- B7: Download các file css và js tại đây, copy file jquery.dropdown.css vào thư mục Styles

- B8: Copy  file js jquery.dropdown.js vào thư mục js

- B9: Copy file action.gif vào thư mục Images Project

- B10: 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" %>
<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">
    <asp:ScriptManager ID="ScriptManager1" runat="server">
    </asp:ScriptManager>
    <asp:UpdatePanel ID="updatePanel" runat="server" UpdateMode="Conditional">
        <ContentTemplate>
            <h3>
                Dropdown Menu in Asp.Net GridView
            </h3>           
            <table cellpadding="2" cellspacing="3" width="100%">
                <tr>
                    <td>
                       
                    </td>
                    <td align="right">
                        <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>
                <tr id="trMessage" runat="server" visible="false">
                    <td colspan="2">
                        <asp:Label ID="lblMessage" runat="server" Text="No Data"></asp:Label>
                    </td>
                </tr>
                <tr>
                    <td colspan="2">
                        <asp:GridView ID="grvObject" runat="server" AllowPaging="true" PageSize="12"
                            CssClass="GridStyle" BorderColor="#cbcbcb" BorderStyle="solid"
                            BorderWidth="1" AutoGenerateColumns="false" width="100%">
                            <AlternatingRowStyle CssClass="GridStyle_AltRowStyle" />
                            <HeaderStyle CssClass="GridStyle_HeaderStyle" />
                            <RowStyle CssClass="GridStyle_RowStyle" />
                            <pagerstyle cssclass="GridStyle_pagination" />
                            <Columns>
                                <asp:TemplateField HeaderText = "Number">
                                    <ItemStyle HorizontalAlign="Center" Width="2%"></ItemStyle>
                                    <ItemTemplate>
                                        <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">
                                    <ItemStyle Width="10%"></ItemStyle>
                                    <ItemTemplate>
                                        <span id="spActionMenu" runat="server" class="actionmenu">
                                            <asp:Label ID="lblAccountCode" Text='<%# Eval("AccountCode") %>' runat="server"></asp:Label>
                                            <asp:Image ID="imgActionMenu" runat="server"></asp:Image>
                                        </span>
                                        <div id="ucdropdownmenu" runat="server" class="dropdownmenu dropdownmenu-tip">
                                             <div class="dropdownmenu-menu">
                                                <asp:DataList id="lstMenu" cellspacing="0" cellpadding="0" RepeatDirection="vertical" Runat="Server" Width="100%" EnableViewState="false">
                                                    <ItemTemplate>
                                                        <table cellpadding="0" cellspacing="0" width="100%">
                                                            <tr>
                                                                <td>
                                                                    <asp:HyperLink id="lnkMenu" Text='<%# Eval("MenuName") %>' runat="server" />
                                                                </td>
                                                            </tr>
                                                        </table>
                                                    </ItemTemplate>
                                                </asp:DataList>
                                            </div>
                                        </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>

B11: Viết Code cho file Default.aspx

'Visit http://thuthuatlaptrinh.blogspot.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 BindMenu(ByVal ucMenu As DataList)
            Dim dtNew As DataTable = New DataTable()
            Dim dtRow As DataRow
            dtRow = dtNew.NewRow()

            dtNew.Columns.Add("MenuName", GetType(String))
            dtRow("MenuName") = "Edit"
            dtNew.Rows.Add(dtRow)

            dtRow = dtNew.NewRow()
            dtRow("MenuName") = "Delete"
            dtNew.Rows.Add(dtRow)

            dtRow = dtNew.NewRow()
            dtRow("MenuName") = "View"
            dtNew.Rows.Add(dtRow)

            ucMenu.DataSource = dtNew
            ucMenu.DataBind()
        End Sub

        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 lstMenu As DataList = DirectCast(e.Row.FindControl("lstMenu"), DataList)
                If Not lstMenu Is Nothing Then
                    BindMenu(lstMenu)
                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 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.


Code Example C#, Code Example VB.NET
Code Example C#, Code Example VB.NET




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