Sử dụng iTextSharp Export thông tin bản ghi trong ASP.Net

By Unknown - Wednesday, May 13, 2015 - No Comments

(Export dữ liệu trong Asp.net sử dụng thư viện iTextSharp) – iTextSharp là một thư viện cho phép bạn tạo và thao tác các tài liệu PDF, iTextSharp cung cấp các tính năng cho phép người phát triển như:

Nghe những bài hát đỉnh nhất về Thấy cô giáo - Nghe trên Youtube

- Tạo ra các tài liệu động từ các tập tin XML hoặc cơ sở dữ liệu
- Thêm dấu trang, số trang, hình mờ
- Chia, nối, và thao tác các trang PDF
- Điền các thông tin vào file PDF có sẵn
- Thêm chữ ký số vào một file PDF

Bài viết dưới đây, thủ thuật tin học sẽ giới thiệu với các bạn cách sử dụng thư viện iTextSharp để Export thông tin chi tiết 1 bản ghi ra file PDF.

- B1: Tạo CSDL SQL Customers

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

STT	Tên trường	Kiểu trường	Ghi chú
1	ContactID	Int	Trường tự tăng
2	ContactCode	nvarchar(25)
3	ContactName	nvarchar(250)
4	Sex	bit
5	Birthdate	datetime
6	ContactAddress	nvarchar(250)
7	Mobille	nvarchar(50)
8	Email	nvarchar(150)
9	CreatedDate	datetime
10	ModifiedDate	datetime

- B3: Nhập dữ liệu cho bảng Contacts

- B4: Tạo các stored procedure trong SQL Server

CREATE PROCEDURE [dbo].[Pro_Contacts_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 Contacts'

set @strWhere =' Where 1=1 '

if @Keyword<>''

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

Or ContactName like N''%' +@Keyword+'%'' Or ContactAddress like N''%' +@Keyword+'%''

Or Mobille like N''%' +@Keyword+'%'' Or Email like N''%' +@Keyword+'%'')'

if @SortField='CreatedDate'

Begin

set @strOrder =' Order by CreatedDate'

End

Else

Begin

set @strOrder =' Order by ContactName'

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

- 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 ExportRecordsUsingItextsharp

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

Public Function GetRow(ByVal ProcName As String, ByVal ParamArray Para() As ObjectPara) As DataRow

Try

Dim tb As New DataTable

Dim adap As New SqlDataAdapter(ProcName, _connectionString)

adap.SelectCommand.CommandType = CommandType.StoredProcedure

For Each p As ObjectPara In Para

adap.SelectCommand.Parameters.Add(New SqlParameter(p.Name, p.Value))

adap.Fill(tb)

If tb.Rows.Count Then

Return tb.Rows(0)

End If

Catch ex As Exception

Return Nothing

End Try

Return Nothing

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

Public Class MyEventArgs

Inherits EventArgs

Private Name As String

Private MyId As String

Public Property SelectedName() As String

Get

Return Name

End Get

Set(ByVal value As String)

Name = value

End Set

End Property

Public Property Id() As String

Get

Return MyId

End Get

Set(ByVal value As String)

MyId = value

End Set

End Property

End Class

Public Class Constants

Public Const DEFAULT_COLOR_COMPANYNAME As String = "#007dc2"

End Class

End Namespace

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

- B6: Download thư viện iTextSharp tại đây

- B7: References itextsharp.dll trong thư mục vừa giải nén vào Project

- B8: Tạo thư mục Fonts, Download Font ARIALUNI.TTF tại đây và copy file này vào thư mục vừa tạo.

- B9: Download các file ảnh tại đây, Copy ảnh lần lượt vào các thư mục Images

+ delete.gif, icon_search.gif, icon_pdf.gif vào thư mục Images
+ no.png, yes.png, sprite.png, lt.gif vào thư mục Styles\Images

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

<%@ Page Title="Export Records Using Itextsharp in ASP.Net" Language="vb" MasterPageFile="~/Site.Master" AutoEventWireup="false" CodeBehind="Default.aspx.vb" Inherits="ExportRecordsUsingItextsharp._Default" %>

<%@ Register TagPrefix="ModalPopup" TagName="ViewRecord" Src="~/UserControls/Popup_ViewRecord.ascx"%>

<%@ Register TagPrefix="ModalPopup" TagName="Delete" Src="~/UserControls/Popup_ConfirmDelete.ascx"%>

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

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

</asp:ScriptManager>

<h1>

Export Records Using Itextsharp in ASP.Net

</h1>

<br />

<ModalPopup:ViewRecord ID="ucViewRecord" runat="server" />

<ModalPopup:Delete ID="ucDeleteItem" runat="server" />

<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"

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

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

<asp:TemplateField HeaderText="ContactCode">

<asp:LinkButton id="cmdContactCode" runat="server" CausesValidation="False" CommandName="View" CommandArgument='<%# Eval("ContactID") %>' text='<%# Eval("ContactCode") %>'></asp:LinkButton>

</ItemTemplate>

</asp:TemplateField>

<asp:TemplateField HeaderText="ContactName">

<asp:LinkButton id="cmdContactName" runat="server" CausesValidation="False" CommandName="View" CommandArgument='<%# Eval("ContactID") %>' text='<%# Eval("ContactName") %>'></asp:LinkButton>

</ItemTemplate>

</asp:TemplateField>

<asp:TemplateField HeaderText="Birthdate">

<asp:Label ID="lblBirthdate" Text='<%# Eval("Birthdate").ToShortDateString %>' runat="server"></asp:Label>

</ItemTemplate>

</asp:TemplateField>

<asp:TemplateField HeaderText="Mobille">

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

</ItemTemplate>

</asp:TemplateField>

<asp:TemplateField HeaderText="Email">

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

</ItemTemplate>

</asp:TemplateField>

<asp:TemplateField HeaderText="Function">

<asp:ImageButton ID="cmdExport" CommandName="ExportPDF" CommandArgument='<%# Eval("ContactID")%>' runat="server" ImageUrl="~/images/icon_pdf.gif" CausesValidation="False"></asp:ImageButton>

<asp:ImageButton ID="cmdDelete" CommandName="Delete" CommandArgument='<%# Eval("ContactID")%>' runat="server" ImageUrl="~/images/delete.gif" CausesValidation="False"></asp:ImageButton>

</ItemTemplate>

</asp:TemplateField>

</Columns>

</asp:GridView>

</td>

</tr>

</table>

</ContentTemplate>

</asp:UpdatePanel>

</asp:Content>

- B11: Viết Code cho file Default.aspx

Imports iTextSharp.text.html

Imports iTextSharp.text

Imports iTextSharp.text.html.simpleparser

Imports iTextSharp.text.pdf

Namespace ExportRecordsUsingItextsharp

Public Class _Default

Inherits System.Web.UI.Page

#Region "Export PDF"

Private Sub ExportToPDF(ByVal ItemID As Integer, ByVal FileName As String)

Dim document As New Document(PageSize.A4.Rotate, 20, 20, 30, 20)

Dim msReport As New System.IO.MemoryStream()

Dim FilePath As String = ""

FilePath = Server.MapPath("Fonts\ARIALUNI.TTF")

Dim fontpath As String = FilePath

'"simsun.ttf" file was downloaded from web and placed in the folder

Dim bf As BaseFont = BaseFont.CreateFont(fontpath, BaseFont.IDENTITY_H, BaseFont.EMBEDDED)

'create new font based on BaseFont

Dim fontCompany As New Font(bf, 13, Font.BOLD, New Color(System.Drawing.ColorTranslator.FromHtml(Constants.DEFAULT_COLOR_COMPANYNAME)))

Dim fontHeader As New Font(bf, 12, Font.BOLD, Color.BLUE)

Dim fontSubHeader As New Font(bf, 10)

Dim fontTitle As New Font(bf, 11, Font.BOLD, Color.BLACK)

Dim fontContent As New Font(bf, 11, Font.NORMAL, Color.BLACK)

Try

' creation of the different writers

Dim writer As PdfWriter = PdfWriter.GetInstance(document, msReport)

' we add some meta information to the document

document.AddAuthor("Thu thuat lap trinh")

document.AddSubject("Export to PDF")

document.Open()

Dim cBreak As New Chunk(Environment.NewLine)

Dim pBreak As New Phrase()

Dim paBreak As New Paragraph()

'=================Start Header =====================

'CompnayName

Dim sText As String = "THỦ THUẬT LẬP TRÌNH" & vbCrLf

Dim beginning As New Chunk(sText, fontCompany)

Dim p1 As New Phrase(beginning)

Dim pCompanyName As New Paragraph()

pCompanyName.IndentationLeft = 30

pCompanyName.Add(p1)

document.Add(pCompanyName)

'Website

Dim sWebsite As String = "Website: http://thuthuatlaptrinh.blogspot.com"

sText = ""

If sWebsite <> "" Then

sText = sWebsite & vbCrLf

End If

If sText <> "" Then

sText = sText.Replace(Environment.NewLine, String.Empty).Replace(" ", String.Empty)

beginning = New Chunk(sText, fontSubHeader)

p1 = New Phrase(beginning)

Dim pAddresse As New Paragraph()

pAddresse.IndentationLeft = 30

pAddresse.Add(p1)

document.Add(pAddresse)

End If

Dim sEmail As String = "Email: kenhphanmemviet@gmail.com"

If sEmail <> "" Then

sText = sEmail & vbCrLf

End If

If sText <> "" Then

sText = sText.Replace(Environment.NewLine, String.Empty).Replace(" ", String.Empty)

beginning = New Chunk(sText, fontSubHeader)

p1 = New Phrase(beginning)

Dim pAddresse As New Paragraph()

pAddresse.IndentationLeft = 30

pAddresse.Add(p1)

document.Add(pAddresse)

End If

'=================End Header =====================

'Title

sText = "CONTACT INFO" & Environment.NewLine & vbCrLf

If sText <> "" Then

beginning = New Chunk(sText, fontHeader)

p1 = New Phrase(beginning)

Dim pAddresse As New Paragraph()

pAddresse.IndentationLeft = 10

pAddresse.Alignment = 1

pAddresse.Add(p1)

document.Add(pAddresse)

End If

Dim datatable As New iTextSharp.text.Table(4)

datatable.Padding = 1

datatable.Spacing = 0

datatable.WidthPercentage = 95

Dim headerwidths As Single() = {16, 34, 16, 34}

datatable.Widths = headerwidths

datatable.DefaultCellBorderWidth = 0

datatable.BorderWidth = 0

datatable.DefaultHorizontalAlignment = 3

datatable.DefaultVerticalAlignment = 1

Dim objSQL As New SqlDataProvider

Dim objInfo As DataRow = objSQL.GetRow("Pro_Contacts_Get", New ObjectPara("@ContactID", ItemID))

If Not objInfo Is Nothing Then

With objInfo

'ContactCode

datatable.DefaultColspan = 1

datatable.AddCell(New Phrase("Contact Code", fontTitle))

datatable.DefaultColspan = 1

datatable.AddCell(New Phrase(objInfo("ContactCode"), fontContent))

'ContactName

datatable.DefaultColspan = 1

datatable.AddCell(New Phrase("Contact Name", fontTitle))

datatable.DefaultColspan = 1

datatable.AddCell(New Phrase(objInfo("ContactName"), fontContent))

'Address

datatable.DefaultColspan = 1

datatable.AddCell(New Phrase("Address", fontTitle))

datatable.DefaultColspan = 3

If Not IsDBNull(objInfo("Address")) Then

datatable.AddCell(New Phrase(objInfo("Address"), fontContent))

Else

datatable.AddCell(New Phrase("", fontContent))

End If

'Sex

datatable.DefaultColspan = 1

datatable.AddCell(New Phrase("Sex", fontTitle))

datatable.DefaultColspan = 1

If Not IsDBNull(objInfo("Sex")) Then

If objInfo("Sex") Then

datatable.AddCell(New Phrase("Male", fontContent))

Else

datatable.AddCell(New Phrase("Female", fontContent))

End If

Else

datatable.AddCell(New Phrase("Female", fontContent))

End If

'Birthdate

datatable.DefaultColspan = 1

datatable.AddCell(New Phrase("Birthdate", fontTitle))

datatable.DefaultColspan = 1

If Not IsDBNull(objInfo("Birthdate")) Then

datatable.AddCell(New Phrase(CType(objInfo("Birthdate"), Date).ToShortDateString, fontContent))

Else

datatable.AddCell(New Phrase("", fontContent))

End If

'Email

datatable.DefaultColspan = 1

datatable.AddCell(New Phrase("Email", fontTitle))

datatable.DefaultColspan = 1

If Not IsDBNull(objInfo("Email")) Then

datatable.AddCell(New Phrase(objInfo("Email"), fontContent))

Else

datatable.AddCell(New Phrase("", fontContent))

End If

'Mobille

datatable.DefaultColspan = 1

datatable.AddCell(New Phrase("Mobille", fontTitle))

datatable.DefaultColspan = 1

If Not IsDBNull(objInfo("Mobille")) Then

datatable.AddCell(New Phrase(objInfo("Mobille"), fontContent))

Else

datatable.AddCell(New Phrase("", fontContent))

End If

'CreatedDate

datatable.DefaultColspan = 1

datatable.AddCell(New Phrase("CreatedDate", fontTitle))

datatable.DefaultColspan = 1

If Not IsDBNull(objInfo("CreatedDate")) Then

datatable.AddCell(New Phrase(objInfo("CreatedDate"), fontContent))

Else

datatable.AddCell(New Phrase("", fontContent))

End If

'ModifiedDate

datatable.DefaultColspan = 1

datatable.AddCell(New Phrase("ModifiedDate", fontTitle))

datatable.DefaultColspan = 1

If Not IsDBNull(objInfo("ModifiedDate")) Then

datatable.AddCell(New Phrase(objInfo("ModifiedDate"), fontContent))

Else

datatable.AddCell(New Phrase("", fontContent))

End If

document.Add(datatable)

End With

End If

Catch e As Exception

Console.Error.WriteLine(e.Message)

End Try

document.Close()

Response.Clear()

Response.AddHeader("content-disposition", "attachment;filename=" & FileName & ".pdf")

Response.ContentType = "application/pdf"

Response.BinaryWrite(msReport.ToArray())

Response.End()

End Sub

#End Region

#Region "Bind Data"

Private Sub BindContact()

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_Contacts_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_RowCommand(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewCommandEventArgs) Handles grvObject.RowCommand

Dim ItemID As Integer = Integer.Parse(e.CommandArgument)

Select Case e.CommandName.ToLower

Case "view"

With CType(ucViewRecord, ExportRecordsUsingItextsharp.UserControls.Popup_ViewRecord)

.ItemID = ItemID

.ShowPopup(ItemID)

End With

Case "exportpdf"

ExportToPDF(ItemID, "ContactInfo_" & ItemID & ".pdf")

End Select

End Sub

Private Sub grvObject_RowDeleting(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewDeleteEventArgs) Handles grvObject.RowDeleting

Dim ItemID As Integer = CType(grvObject.DataKeys(e.RowIndex).Value, Integer)

Dim ItemName As String = ""

If ItemID <> -1 Then

With CType(ucDeleteItem, ExportRecordsUsingItextsharp.UserControls.Popup_ConfirmDelete)

.ItemID = ItemID

.ShowPopup(ItemID, "")

End With

End If

End Sub

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

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

Dim ContactID As Integer = DataBinder.Eval(e.Row.DataItem, "ContactID")

'Export

Dim cmdExport As ImageButton = DirectCast(e.Row.FindControl("cmdExport"), ImageButton)

If Not cmdExport Is Nothing Then

cmdExport.ToolTip = "Export Contact"

ScriptManager.GetCurrent(Page).RegisterPostBackControl(cmdExport)

End If

'Delete

Dim cmdDelete As ImageButton = DirectCast(e.Row.FindControl("cmdDelete"), ImageButton)

If Not cmdDelete Is Nothing Then

cmdDelete.ToolTip = "Delete Contact"

End If

End Sub

#End Region

#Region "Popup"

Private Sub MySelDelete_OnSelectedRow(ByVal sender As Object, ByVal e As ExportRecordsUsingItextsharp.MyEventArgs)

Dim ItemName As String = ""

With e

If e.Id <> "" Then

BindContact()

End If

End With

End Sub

#End Region

#Region "Event Handles"

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

Try

AddHandler CType(ucDeleteItem, ExportRecordsUsingItextsharp.UserControls.Popup_ConfirmDelete).OnSelectedRow, AddressOf MySelDelete_OnSelectedRow

If Page.IsPostBack = False Then

'Default Submit Button

Page.Form.DefaultButton = cmdQuickSearch.UniqueID

BindContact()

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

BindContact()

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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