Sử dụng iTextSharp để Export file PDF các bản ghi được chọn trên Datalist trong ASP.Net

By Unknown - Saturday, August 22, 2015 - No Comments

(Export selected Datalist Rows to PDF using itextsharp in ASP.Net) – Bài viết dưới đây sẽ hướng dẫn các bạn cách sử dụng itextsharp để xuất dữ liệu ra file PDF. Dữ liệu được xuất file PDF được lấy bằng cách tích chọn các dòng từ người sử dụng. Số cột, tên cột, độ rộng trên file PDF được lấy tự động tương ứng trên Datalist.

Xem những Video hay dành cho thiếu nhi - Nghe trên Youtube

- B1: Download CSDL Northwind tại đây và thực hiện công việc Restore Data.

- B2: Tạo Project trong Microsoft Visual Studio 2010

C# Code

using System;

using System.Collections.Generic;

using System.Linq;

using System.Data.SqlClient;

using System.Data;

using System.Configuration;

using System.Text;

using System.Web;

namespace ExportSelectedDatalistRowToPDF

{

public class SqlDataProvider

{

#region "Membres Prives"

private string _connectionString;

#endregion

#region "Constructeurs"

public SqlDataProvider()

{

try

{

_connectionString = ConfigurationManager.ConnectionStrings["SiteSqlServer"].ConnectionString;

}

catch

{

}

#endregion

#region "Proprietes"

public string ConnectionString

{

get { return _connectionString; }

}

#endregion

#region "Functions"

public DataTable FillTable(string sql)

{

try

{

DataTable tb = new DataTable();

SqlDataAdapter adap = new SqlDataAdapter(sql, _connectionString);

adap.Fill(tb);

return tb;

}

catch

{

return null;

}

#endregion

}

public class Constants

{

public const string DEFAULT_COLOR_COMPANYNAME = "#007dc2";

public const string DEFAULT_BACKGROUNDCOLOR_HEADERROW = "#99cd00";

public const string DEFAULT_COLOR_HEADERROW = "#ffffff";

public const string DEFAULT_BORDERCOLOR_TABLE = "#808080";

public const string DEFAULT_BACKGROUNDCOLOR_ROW = "#edf5ff";

}

VB.Net Code

Imports System.Data.SqlClient

Imports System.Data

Namespace ExportSelectedDatalistRowUsingItextsharp

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

#End Region

End Class

Public Class Constants

Public Const DEFAULT_COLOR_COMPANYNAME As String = "#007dc2"

Public Const DEFAULT_BACKGROUNDCOLOR_HEADERROW As String = "#99cd00"

Public Const DEFAULT_BORDERCOLOR_TABLE As String = "#808080"

Public Const DEFAULT_BACKGROUNDCOLOR_ROW As String = "#edf5ff"

Public Const DEFAULT_COLOR_HEADERROW As String = "#ffffff"

End Class

End Namespace

- B3: Download thư viện iTextSharp tại đây

- B4: References itextsharp.dll trong thư mục vừa giải nén vào Project.

- B5: Tạo thư mục Fonts, Download Font ARIALUNI.TTF tại đây và copy file này vào thư mục vừa tạo

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

<%@ Page Title="Export Selected Datalist Row Using itextsharp in ASP.Net" Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="ExportSelectedDatalistRowToPDF._Default" %>

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

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

</asp:ScriptManager>

<h3>

Export Selected Datalist Row Using itextsharp in ASP.Net

</h3>

<asp:Literal ID="ltScript" runat="server"></asp:Literal>

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

<tr>

<td>

<asp:LinkButton id="cmdExport" runat="server" CssClass="btn btn-small" OnClick="cmdExport_Click" Causesvalidation="false">

</asp:LinkButton>

<asp:LinkButton id="cmdExportAll" runat="server" CssClass="btn btn-small" OnClick="cmdExportAll_Click" Causesvalidation="false">

</asp:LinkButton>

</div>

</td>

</tr>

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

</td>

</tr>

<tr>

<asp:DataList ID="dlObject" runat="server" DataKeyField="ProductID" Width="100%">

<tr>

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

</th>

<tr>

<th align="center" width="200">ProductName</th>

<th align="center" width="100">QuantityPerUnit</th>

<th align="center" width="80">UnitPrice</th>

<th align="center" width="80">UnitsInStock</th>

<th align="center" width="80">UnitsOnOrder</th>

</tr>

</table>

</th>

</tr>

</HeaderTemplate>

<tr>

<tr>

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

</td>

</tr>

</table>

</td>

</tr>

</ItemTemplate>

</table>

</FooterTemplate>

</asp:DataList>

</td>

</tr>

</table>

</ContentTemplate>

<asp:PostBackTrigger ControlID="cmdExport" />

<asp:PostBackTrigger ControlID="cmdExportAll" />

</Triggers>

</asp:UpdatePanel>

</asp:Content>

- B7: Viết Code cho file Default.aspx
C# Code

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

using System;

using System.Data;

using System.Web.UI.WebControls;

using System.Web.UI.HtmlControls;

using System.Web;

using iTextSharp.text.html;

using iTextSharp.text;

using iTextSharp.text.html.simpleparser;

using iTextSharp.text.pdf;

namespace ExportSelectedDatalistRowToPDF

{

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

{

#region "Export PDF"

private void ExportToPDF(string FileName, bool ExportAll)

{

Document document = new Document(PageSize.A4, 10f, 10f, 5f, 0f);

System.IO.MemoryStream msReport = new System.IO.MemoryStream();

string FilePath = "";

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

string fontpath = FilePath;

BaseFont bf = BaseFont.CreateFont(fontpath, BaseFont.IDENTITY_H, BaseFont.EMBEDDED);

Font fontCompany = new Font(bf, 12, Font.BOLD, new Color(System.Drawing.ColorTranslator.FromHtml(Constants.DEFAULT_COLOR_COMPANYNAME)));

Font fontHeader = new Font(bf, 11, Font.BOLD, Color.BLUE);

Font fontSubHeader = new Font(bf, 10);

Font fontContent = new Font(bf, 10, Font.NORMAL, Color.BLACK);

Font fontTableHeader = new Font(bf, 10, Font.BOLD, new Color(System.Drawing.ColorTranslator.FromHtml(Constants.DEFAULT_COLOR_HEADERROW)));

try

{

PdfWriter writer = PdfWriter.GetInstance(document, msReport);

document.AddAuthor("Thu thuat lap trinh");

document.AddSubject("Export to PDF");

document.Open();

Chunk cBreak = new Chunk(Environment.NewLine);

Phrase pBreak = new Phrase();

Paragraph paBreak = new Paragraph();

//=================Start Header =====================

//CompnayName

string sText = "THỦ THUẬT LẬP TRÌNH";

Chunk beginning = new Chunk(sText, fontCompany);

Phrase p1 = new Phrase(beginning);

Paragraph pCompanyName = new Paragraph();

pCompanyName.IndentationLeft = 30;

pCompanyName.Add(p1);

document.Add(pCompanyName);

//Website

string sWebsite = "Website: http://www.laptrinhdotnet.com";

sText = "";

if (!string.IsNullOrEmpty(sWebsite))

{

sText = sWebsite ;

}

if (!string.IsNullOrEmpty(sText))

{

sText = sText.Replace(Environment.NewLine, string.Empty).Replace(" ", string.Empty);

beginning = new Chunk(sText, fontSubHeader);

p1 = new Phrase(beginning);

Paragraph pAddresse = new Paragraph();

pAddresse.IndentationLeft = 30;

pAddresse.Add(p1);

document.Add(pAddresse);

}

string sEmail = "Email: kenhphanmemviet@gmail.com";

if (!string.IsNullOrEmpty(sEmail))

{

sText = sEmail ;

}

if (!string.IsNullOrEmpty(sText))

{

sText = sText.Replace(Environment.NewLine, string.Empty).Replace(" ", string.Empty);

beginning = new Chunk(sText, fontSubHeader);

p1 = new Phrase(beginning);

Paragraph pAddresse = new Paragraph();

pAddresse.IndentationLeft = 30;

pAddresse.Add(p1);

document.Add(pAddresse);

}

//=================End Header =====================

//Title

sText = "LIST PRODUCT" + Environment.NewLine ;

if (!string.IsNullOrEmpty(sText))

{

beginning = new Chunk(sText, fontHeader);

p1 = new Phrase(beginning);

Paragraph pAddresse = new Paragraph();

pAddresse.IndentationLeft = 10;

pAddresse.Alignment = 1;

pAddresse.Add(p1);

document.Add(pAddresse);

}

int iColumn = 0;

int i = 0;

HtmlTable tblProduct = dlObject.Controls[0].Controls[0].FindControl("tblProduct") as HtmlTable;

if (tblProduct != null)

{

for (i = 0; i <= tblProduct.Rows[0].Cells.Count - 1; i++)

{

iColumn += 1;

}

if (iColumn > 0)

{

iTextSharp.text.Table datatable = new iTextSharp.text.Table(iColumn);

float[] headerwidths = new float[iColumn];

datatable.Padding = 2;

datatable.Spacing = 1;

datatable.WidthPercentage = 98;

for (i = 0; i <= tblProduct.Rows[0].Cells.Count - 1; i++)

{

headerwidths[i] = Convert.ToInt32(tblProduct.Rows[0].Cells[i].Width);

datatable.Widths = headerwidths;

Cell cellText = new Cell(new Phrase(tblProduct.Rows[0].Cells[i].InnerHtml, fontTableHeader));

cellText.BackgroundColor = new Color(System.Drawing.ColorTranslator.FromHtml(Constants.DEFAULT_BACKGROUNDCOLOR_HEADERROW));

cellText.HorizontalAlignment = 1;

cellText.VerticalAlignment = 1;

datatable.AddCell(cellText);

}

datatable.BorderWidth = 1;

datatable.DefaultCellBorderWidth = 1;

datatable.DefaultHorizontalAlignment = 1;

datatable.DefaultVerticalAlignment = 1;

datatable.DefaultCellBorderColor = new iTextSharp.text.Color(System.Drawing.ColorTranslator.FromHtml(Constants.DEFAULT_BORDERCOLOR_TABLE));

datatable.BorderColor = new iTextSharp.text.Color(System.Drawing.ColorTranslator.FromHtml(Constants.DEFAULT_BORDERCOLOR_TABLE));

int iRow = dlObject.Items.Count;

bool b_SelectedRow = false;

int iAlign = 0;

string cellValue = "";

for (i = 0; i <= iRow - 1; i++)

{

HtmlTable tblInfo;

DataListItem mySelectedRow = dlObject.Items[i];

CheckBox chkSelect = mySelectedRow.FindControl("chkSelect") as CheckBox;

tblInfo = mySelectedRow.FindControl("tblInfo") as HtmlTable;

if (chkSelect != null & tblInfo != null)

{

if (ExportAll)

{

b_SelectedRow = true;

}

else

{

b_SelectedRow = chkSelect.Checked;

}

if (b_SelectedRow)

{

for (int j = 1; j <= iColumn; j++)

{

switch (tblInfo.Rows[0].Cells[j].Align)

{

case "":

case "left":

iAlign = 0;

break;

case "right":

iAlign = 2;

break;

case "center":

iAlign = 1;

break;

}

cellValue = tblInfo.Rows[0].Cells[j].InnerHtml;

iTextSharp.text.Cell cell = new iTextSharp.text.Cell(cellValue);

if (i % 2 != 0)

{

cell.BackgroundColor = new Color(System.Drawing.ColorTranslator.FromHtml(Constants.DEFAULT_BACKGROUNDCOLOR_ROW));

}

datatable.DefaultHorizontalAlignment = iAlign;

datatable.AddCell(cell);

}

document.Add(datatable);

}

catch

{

}

document.Close();

Response.Clear();

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

Response.ContentType = "application/pdf";

Response.BinaryWrite(msReport.ToArray());

Response.End();

}

#endregion

#region "Bind Data"

private void BindProduct()

{

DataTable objBind = new DataTable();

objBind = BindData();

if (objBind != null)

{

if (objBind.Rows.Count > 0)

{

dlObject.DataSource = objBind;

dlObject.DataBind();

trMessage.Visible = false;

dlObject.Visible = true;

}

else

{

trMessage.Visible = true;

dlObject.Visible = false;

}

updatePanel.Update();

}

private DataTable BindData()

{

SqlDataProvider objSQL = new SqlDataProvider();

DataTable objBind = objSQL.FillTable("Select Products.* From Products");

return objBind;

}

#endregion

#region "Event Handles"

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

{

try

{

if (!IsPostBack)

{

BindProduct();

}

catch

{

}

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

{

ExportToPDF("List-Product.pdf", false);

}

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

{

ExportToPDF("List-Product.pdf", true);

}

#endregion

}

VB.Net Code

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

Imports iTextSharp.text.html

Imports iTextSharp.text

Imports iTextSharp.text.html.simpleparser

Imports iTextSharp.text.pdf

Namespace ExportSelectedDatalistRowUsingItextsharp

Public Class _Default

Inherits System.Web.UI.Page

#Region "Export PDF"

Private Sub ExportToPDF(ByVal FileName As String, ByVal ExportAll As Boolean)

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

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

Dim fontCompany As New Font(bf, 12, Font.BOLD, New Color(System.Drawing.ColorTranslator.FromHtml(Constants.DEFAULT_COLOR_COMPANYNAME)))

Dim fontHeader As New Font(bf, 11, Font.BOLD, Color.BLUE)

Dim fontSubHeader As New Font(bf, 10)

Dim fontContent As New Font(bf, 10, Font.NORMAL, Color.BLACK)

Dim fontTableHeader As New Font(bf, 10, Font.BOLD, New Color(System.Drawing.ColorTranslator.FromHtml(Constants.DEFAULT_COLOR_HEADERROW)))

Try

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

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://www.laptrinhdotnet.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 = "LIST PRODUCT" & 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 iColumn As Integer = 0

Dim i As Integer = 0

Dim tblProduct As HtmlControls.HtmlTable = dlObject.Controls(0).Controls(0).FindControl("tblProduct")

If Not tblProduct Is Nothing Then

For i = 0 To tblProduct.Rows(0).Cells.Count - 1

iColumn += 1

End If

If iColumn > 0 Then

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

Dim headerwidths As Single() = New Single(iColumn - 1) {}

datatable.Padding = 2

datatable.Spacing = 1

datatable.WidthPercentage = 98

For i = 0 To tblProduct.Rows(0).Cells.Count - 1

headerwidths(i) = CInt(tblProduct.Rows(0).Cells(i).Width)

datatable.Widths = headerwidths

Dim cellText As New Cell(New Phrase(tblProduct.Rows(0).Cells(i).InnerHtml, fontTableHeader))

cellText.BackgroundColor = New Color(System.Drawing.ColorTranslator.FromHtml(Constants.DEFAULT_BACKGROUNDCOLOR_HEADERROW))

cellText.HorizontalAlignment = 1

cellText.VerticalAlignment = 1

datatable.AddCell(cellText)

datatable.BorderWidth = 1

datatable.DefaultCellBorderWidth = 1

datatable.DefaultHorizontalAlignment = 1

datatable.DefaultVerticalAlignment = 1

datatable.DefaultCellBorderColor = New iTextSharp.text.Color(System.Drawing.ColorTranslator.FromHtml(Constants.DEFAULT_BORDERCOLOR_TABLE))

datatable.BorderColor = New iTextSharp.text.Color(System.Drawing.ColorTranslator.FromHtml(Constants.DEFAULT_BORDERCOLOR_TABLE))

Dim iRow As Integer = dlObject.Items.Count

Dim b_SelectedRow As Boolean = False

Dim iAlign As Integer = 0

Dim cellValue As String = ""

For i = 0 To iRow - 1

Dim mySelectedRow As DataListItem = dlObject.Items(i)

Dim chkSelect As CheckBox = TryCast(mySelectedRow.FindControl("chkSelect"), CheckBox)

Dim tblInfo As HtmlControls.HtmlTable = TryCast(mySelectedRow.FindControl("tblInfo"), HtmlTable)

If Not chkSelect Is Nothing And Not tblInfo Is Nothing Then

If ExportAll Then

b_SelectedRow = True

Else

b_SelectedRow = chkSelect.Checked

End If

If b_SelectedRow Then

For j As Integer = 1 To iColumn

Select Case tblInfo.Rows(0).Cells(j).Align

Case "", "left"

iAlign = 0

Case "right"

iAlign = 2

Case "center"

iAlign = 1

End Select

cellValue = tblInfo.Rows(0).Cells(j).InnerHtml

Dim cell As New iTextSharp.text.Cell(cellValue)

If i Mod 2 <> 0 Then

cell.BackgroundColor = New Color(System.Drawing.ColorTranslator.FromHtml(Constants.DEFAULT_BACKGROUNDCOLOR_ROW))

End If

datatable.DefaultHorizontalAlignment = iAlign

datatable.AddCell(cell)

End If

document.Add(datatable)

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 BindProduct()

Dim objBind As New DataTable

objBind = BindData()

If Not objBind Is Nothing Then

If objBind.Rows.Count > 0 Then

dlObject.DataSource = objBind

dlObject.DataBind()

trMessage.Visible = False

dlObject.Visible = True

Else

trMessage.Visible = True

dlObject.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("Select Products.* From Products")

Return objBind

End Function

#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

BindProduct()

End If

Catch ex As Exception

End Try

End Sub

Private Sub cmdExport_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles cmdExport.Click

ExportToPDF("List-Product.pdf", False)

End Sub

Private Sub cmdExportAll_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles cmdExportAll.Click

ExportToPDF("List-Product.pdf", True)

End Sub

#End Region

End Class

End Namespace

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