Xóa nhiều bản ghi được chọn bằng CheckBox trong Asp.Net GridView

By Unknown - Saturday, July 4, 2015 - No Comments

(Xóa nhiều dòng dữ liệu được chọn trong Asp.net GridView) – Có nhiều cách để thực hiện xóa dữ liệu trong Database như: trong các Form thêm, sửa hoặc xóa trực tiếp từng dòng từ danh sách dữ liệu trên Gridview. Với các cách xóa dữ liệu trên sẽ phải mất nhiều thời gian để thực hiện nếu Database có nhiều bản ghi. Vậy làm sao để có thể xóa nhiều bản ghi chỉ bởi 1 lần click. Bài viết dưới đây sẽ hướng dẫn các bạn cách để xóa nhiều bản ghi trong Gridview khi được chọn. Trước khi xóa hộp thoại xác nhận sẽ hiển thị và sau khi xóa xong sẽ có thông báo số lượng bản ghi đã được xóa.

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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 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_Delete]

@AccountID int

DELETE FROM Accounts

WHERE

AccountID = @AccountID

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 DeleteMultipleRowsUsingCheckboxes

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

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

End Namespace

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

- B6: Mở file Default.aspxdưới dạng HTML và nhập mã HTML

<%@ Page Title="Delete Multiple Rows in Asp.net Gridview using Checkboxes" Language="vb" MasterPageFile="~/Site.Master" AutoEventWireup="false" EnableEventValidation= "false" CodeBehind="Default.aspx.vb" Inherits="DeleteMultipleRowsUsingCheckboxes._Default" %>

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

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

</asp:ScriptManager>

<h3>

Delete Multiple Rows in Asp.net Gridview using Checkboxes

</h3>

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

<tr>

<td>

<asp:LinkButton id="cmdDelete" runat="server" CssClass="btn btn-small" Causesvalidation="false" Text="Delete">

</asp:LinkButton>

</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" DataKeyNames="AccountID" width="100%">

<asp:TemplateField>

<asp:CheckBox ID="chkAll" runat="server" />

</HeaderTemplate>

<asp:CheckBox ID="chkSelect" runat="server" />

</ItemTemplate>

</asp:TemplateField>

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

<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>

- B7: Viết Code cho file Default.aspx

'Visit http://thuthuatlaptrinh.blogspot.com for more ASP.NET Tutorials

Imports System.Data.SqlClient

Namespace DeleteMultipleRowsUsingCheckboxes

Public Class _Default

Inherits System.Web.UI.Page

#Region "Private Methods"

Private Sub ShowMessage(ByVal iCount As Integer)

Dim sMessage As String = iCount.ToString() & " records deleted."

ScriptManager.RegisterClientScriptBlock(Me.Page, Me.Page.GetType(), "alert", "alert('" & sMessage & "');", True)

End Sub

Private Sub DeleteRecord(ByVal ItemID As Integer)

Dim objSQL As New SqlDataProvider

objSQL.RunSQL("Pro_Accounts_Delete", New ObjectPara("@AccountID", ItemID))

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

cmdDelete.Visible = True

Else

trMessage.Visible = True

grvObject.Visible = False

cmdDelete.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

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

cmdDelete.Attributes.Add("onClick", ("javascript:return confirm('" & "Do you want to Delete Selected Record?" & " ');"))

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

Protected Sub cmdDelete_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles cmdDelete.Click

Try

Dim intCount As Integer = grvObject.Rows.Count

Dim chkSelect As CheckBox

Dim lblLabel As Label

Dim i As Integer

Dim iCount As Integer = 0

For i = 0 To intCount - 1

chkSelect = CType(grvObject.Rows(i).FindControl("chkSelect"), CheckBox)

lblLabel = CType(grvObject.Rows(i).FindControl("lblItemID"), Label)

If Not chkSelect Is Nothing And Not lblLabel Is Nothing Then

Dim AccountID As String = ""

If Not lblLabel Is Nothing Then

AccountID = lblLabel.Text

End If

If AccountID <> -1 AndAlso chkSelect.Checked Then

DeleteRecord(AccountID)

iCount += 1

End If

BindAccount()

ShowMessage(iCount)

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.

Chúc các bạn thành công!

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