Sử dụng iTextSharp để Export thông tin bản ghi trong Datalist
(Sử dụng iTextSharp để xuất thông tin bản ghi ra PDF) – Bài viết dưới đây sẽ hướng dẫn các  bạn cách sử dụng Datalist để hiển thị danh sách dữ liệu và tương ứng với mỗi bản ghi sẽ có chức năng Export. Khi kích nút Export chương trình sẽ tự động lấy toàn bộ thông tin bản ghi để xuất ra file PDF. Dưới đây là các bước thực hiện.
- B1: Download CSDL Northwind tại đây và thực hiện công việc Restore Data.
- B2: 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.
C# Code
using System;
using System.Collections.Generic;
using System.Linq;
using System.Data.SqlClient;
using System.Data;
using System.Configuration;
using System.IO;
using System.Text;
using System.Web;
namespace ExportRecordUsingItextsharpInDatalist
{
    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;
            }
        }
        public DataRow
GetRow(string ProcName, params ObjectPara[] Para)
        {
            try
            {
               
DataTable tb = new DataTable();
               
SqlDataAdapter adap = new SqlDataAdapter(ProcName,
_connectionString);
               
adap.SelectCommand.CommandType = CommandType.StoredProcedure;
               
foreach (ObjectPara
p in Para)
                {
                   
adap.SelectCommand.Parameters.Add(new SqlParameter(p.Name, p.Value));
               
}
               
adap.Fill(tb);
               
if (tb.Rows != null)
               
{
                   
return tb.Rows[0];
               
}
            }
            catch
            {
               
return null;
            }
            return null;
        }
       
#endregion
    }
    public class ObjectPara
    {
        string _name;
        object _Value;
        public ObjectPara(string
Pname, object PValue)
        {
           
_name = Pname;
           
_Value = PValue;
        }
        public string Name
        {
            get { return _name; }
            set { _name = value;
}
        }
        public object Value
        {
            get { return _Value;
}
            set { _Value = value;
}
        }
    }
    public class Constants
    {
        public const string DEFAULT_COLOR_COMPANYNAME = "#007dc2";
    }
}
Imports System.Data.SqlClient
Imports System.Data
Namespace ExportRecordUsingItextsharpInDatalist
    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
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))
               
Next
               
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 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
- B4: Download thư viện iTextSharp tại đây
- B5: References itextsharp.dll trong thư mục vừa giải nén vào Project.
- B6: Tạo thư mục Fonts, Download Font ARIALUNI.TTF tại đây và copy file này vào thư mục vừa tạo
- B7: Mở file Default.aspx dưới dạng HTML và nhập mã HTML
C#
<%@ Page
Title="Export
Records Using Itextsharp in Datalist ASP.Net" Language="C#"
MasterPageFile="~/Site.master"
AutoEventWireup="true"
CodeBehind="Default.aspx.cs"
Inherits="ExportRecordUsingItextsharpInDatalist._Default"
%>
<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">
    <asp:ScriptManager ID="ScriptManager1"
runat="server">
    </asp:ScriptManager>
    <h3>
       
Export Records Using Itextsharp in Datalist
    </h3>
    <asp:UpdatePanel ID="updatePanel"
runat="server"
UpdateMode="Conditional">
        <ContentTemplate>
            <table cellpadding="2"
cellspacing="3"
width="100%">
               
<tr>
                   
<td
colspan="2">
                        <asp:DataList ID="lstEmployees" runat="server" CellPadding="0" CellSpacing="0" Width="100%" 
                        OnItemCommand="lstEmployees_ItemCommand"
                        OnItemDataBound="lstEmployees_ItemDataBound"
                        RepeatDirection="Horizontal"
RepeatColumns="3">
                            <ItemTemplate>
                                <table align="left"
cellpadding="2"
cellspacing="3"
style="border: 1px solid #cccccc; margin-top:5px; margin-bottom:5px;margin-right:5px;"
width="300px"
height="160px">
                                    <tr>
                                        <td colspan="2" class="info">
                                            <asp:Label ID="lblFullName"
Text='<%# Eval("LastName") +
"  "+ Eval("FirstName") %>' runat="server" />
                                        </td>
                                    </tr>
                                    <tr>
                                        <td align="right">
                                            <b><asp:Label ID="plTitle"
runat="server"
Text="Title"></asp:Label></b>: 
                                        </td>
                                        <td>
                                            <asp:Label ID="lblTitle"
text='<%# 
Eval("Title")%>' runat="server"></asp:Label>
                                        </td>
                                    </tr>
                                    <tr>
                                        <td align="right">
                                            <b><asp:Label ID="plAddress"
runat="server"
Text="Address"></asp:Label></b>: 
                                        </td>
                                        <td>
                                            <asp:Label ID="lblAddress"
text='<%# 
Eval("Address")%>' runat="server"></asp:Label>
                                        </td>
                                    </tr>
                                    <tr>
                                        <td align="right">
                                            <b><asp:Label ID="plCity" runat="server"
Text="City"></asp:Label></b>: 
                                        </td>
                                        <td>
                                            <asp:Label ID="lblCity"
text='<%# 
Eval("City")%>' runat="server"></asp:Label>
                                        </td>
                                    </tr>
                                    <tr>
                                        <td align="right">
                                            <b><asp:Label ID="pRegion"
runat="server"
Text="Region"></asp:Label></b>: 
                                        </td>
                                        <td>
                                            <asp:Label ID="lblRegion"
text='<%# 
Eval("Region")%>' runat="server"></asp:Label>
                                        </td>
                                    </tr>
                                    <tr>
                                        <td align="right">
                                            <b><asp:Label ID="plPostalCode"
runat="server"
Text="PostalCode"></asp:Label></b>: 
                                        </td>
                                        <td>
                                            <asp:Label ID="lblPostalCode"
text='<%# 
Eval("PostalCode")%>' runat="server"></asp:Label>
                                        </td>
                                    </tr>
                                    <tr>
                                        <td colspan="2" align="right">
                                             <asp:ImageButton ID="cmdExport"
CommandName="ExportPDF"
CommandArgument='<%# Eval("EmployeeID")%>' runat="server"
ImageUrl="~/images/icon_pdf.gif"
CausesValidation="False"></asp:ImageButton>
                                        </td>
                                    </tr>
                                </table>
                            </ItemTemplate>
                            <ItemStyle VerticalAlign="Top"
/>
                        </asp:DataList>
                   
</td>
               
</tr>
            </table>
        </ContentTemplate>
    </asp:UpdatePanel>
</asp:Content>
VB.Net Code
<%@ Page
Title="Export
Records Using Itextsharp in Datalist" Language="vb" MasterPageFile="~/Site.Master" AutoEventWireup="false" CodeBehind="Default.aspx.vb" Inherits="ExportRecordUsingItextsharpInDatalist._Default"
%>
<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">
    <asp:ScriptManager ID="ScriptManager1"
runat="server">
    </asp:ScriptManager>
    <h3>
       
Export Records Using Itextsharp in Datalist
    </h3>
    <asp:UpdatePanel ID="updatePanel"
runat="server"
UpdateMode="Conditional">
        <ContentTemplate>
            <table cellpadding="2"
cellspacing="3"
width="100%">
               
<tr>
                    <td colspan="2">
                        <asp:DataList ID="lstEmployees" runat="server" CellPadding="0" CellSpacing="0" Width="100%" RepeatDirection="Horizontal" RepeatColumns="3">
                            <ItemTemplate>
                                <table align="left"
cellpadding="2"
cellspacing="3"
style="border: 1px solid #cccccc; margin-top:5px; margin-bottom:5px;margin-right:5px;"
width="300px"
height="160px">
                                    <tr>
             
                          <td colspan="2" class="info">
                                            <asp:Label ID="lblFullName"
Text='<%# Eval("LastName") &
"  " & Eval("FirstName") %>' runat="server" />
                                        </td>
                                    </tr>
                                    <tr>
                                        <td align="right">
                                            <b><asp:Label ID="plTitle"
runat="server"
Text="Title"></asp:Label></b>: 
                                        </td>
                                        <td>
                                            <asp:Label ID="lblTitle"
text='<%# 
Eval("Title")%>' runat="server"></asp:Label>
                                        </td>
                                    </tr>
                                    <tr>
                                        <td align="right">
                                            <b><asp:Label ID="plAddress"
runat="server"
Text="Address"></asp:Label></b>: 
                                        </td>
                                        <td>
                                            <asp:Label ID="lblAddress"
text='<%# 
Eval("Address")%>' runat="server"></asp:Label>
                                        </td>
                                    </tr>
                                    <tr>
                                        <td align="right">
                                            <b><asp:Label ID="plCity" runat="server"
Text="City"></asp:Label></b>: 
                                        </td>
                                        <td>
                                            <asp:Label ID="lblCity"
text='<%# 
Eval("City")%>' runat="server"></asp:Label>
                                        </td>
                                    </tr>
                                    <tr>
                                        <td align="right">
                                            <b><asp:Label ID="pRegion" runat="server" Text="Region"></asp:Label></b>: 
                                        </td>
                                        <td>
                                            <asp:Label ID="lblRegion"
text='<%# 
Eval("Region")%>' runat="server"></asp:Label>
                                        </td>
                                    </tr>
                                    <tr>
                                        <td align="right">
                                            <b><asp:Label ID="plPostalCode"
runat="server"
Text="PostalCode"></asp:Label></b>: 
                                        </td>
                                        <td>
                                            <asp:Label ID="lblPostalCode"
text='<%# 
Eval("PostalCode")%>' runat="server"></asp:Label>
                                        </td>
                                    </tr>
                                    <tr>
                                        <td colspan="2" align="right">
                                             <asp:ImageButton ID="cmdExport"
CommandName="ExportPDF"
CommandArgument='<%# Eval("EmployeeID")%>' runat="server"
ImageUrl="~/images/icon_pdf.gif"
CausesValidation="False"></asp:ImageButton>
                                        </td>
                                    </tr>
                                </table>
                            </ItemTemplate>
             
              <ItemStyle VerticalAlign="Top"
/>
                        </asp:DataList>
                   
</td>
               
</tr>
            </table>
        </ContentTemplate>
    </asp:UpdatePanel>
</asp:Content>- B8: Viết Code cho file Default.aspx
C#
//Visit http://www.laptrinhdotnet.com
for more ASP.NET Tutorials
using Microsoft.VisualBasic;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Text;
using System.Diagnostics;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web;
using iTextSharp.text.html;
using iTextSharp.text;
using iTextSharp.text.html.simpleparser;
using iTextSharp.text.pdf;
namespace ExportRecordUsingItextsharpInDatalist
{
    public partial class _Default :
System.Web.UI.Page
    {
       
#region
"Export PDF"
        private void
ExportToPDF(int ItemID, string FileName)
        {
            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, 13, Font.BOLD,
new Color(System.Drawing.ColorTranslator.FromHtml(Constants.DEFAULT_COLOR_COMPANYNAME)));
            Font fontHeader = new
Font(bf, 12, Font.BOLD,
Color.BLUE);
            Font fontSubHeader = new
Font(bf, 10);
            Font fontTitle = new
Font(bf, 11, Font.BOLD,
Color.BLACK);
            Font fontContent = new
Font(bf, 11, Font.NORMAL,
Color.BLACK);
            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 = "EMPLOYEE
INFO" + 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);
               
}
               
iTextSharp.text.Table datatable = new iTextSharp.text.Table(4);
               
datatable.Padding = 1;
               
datatable.Spacing = 0;
               
datatable.WidthPercentage = 98;
               
float[] headerwidths = {12,38,14,35};
               
datatable.Widths = headerwidths;
               
datatable.DefaultCellBorderWidth = 0;
               
datatable.BorderWidth = 0;
               
datatable.DefaultHorizontalAlignment = 3;
               
datatable.DefaultVerticalAlignment = 1;
               
SqlDataProvider objSQL = new SqlDataProvider();
               
DataRow objInfo = objSQL.GetRow("Pro_Employees_Get", new ObjectPara("@EmployeeID", ItemID));
               
if (objInfo != null)
               
{
                    //LastName
                   
datatable.DefaultColspan = 1;
                   
datatable.AddCell(new Phrase("LastName",
fontTitle));
                   
datatable.DefaultColspan = 1;
                   
datatable.AddCell(new Phrase(objInfo["LastName"].ToString(),
fontContent));
                   
//FirstName
                   
datatable.DefaultColspan = 1;
                   
datatable.AddCell(new Phrase("FirstName",
fontTitle));
                   
datatable.DefaultColspan = 1;
                    datatable.AddCell(new Phrase(objInfo["FirstName"].ToString(), fontContent));
                   
datatable.DefaultColspan = 1;
                   
datatable.AddCell(new Phrase("Title",
fontTitle));
                   
datatable.DefaultColspan = 1;
                   
datatable.AddCell(new Phrase(objInfo["Title"].ToString(),
fontContent));
                   
datatable.DefaultColspan = 1;
                   
datatable.AddCell(new Phrase("TitleOfCourtesy",
fontTitle));
                   
datatable.DefaultColspan = 1;
                   
datatable.AddCell(new Phrase(objInfo["TitleOfCourtesy"].ToString(),
fontContent));
                   
//Address
                   
datatable.DefaultColspan = 1;
                   
datatable.AddCell(new Phrase("Address",
fontTitle));
                   
datatable.DefaultColspan = 3;
                   
if (objInfo["Address"]
!= null)
                   
{
                        datatable.AddCell(new Phrase(objInfo["Address"].ToString(), fontContent));
                   
}
                   
else
                   
{
                        datatable.AddCell(new Phrase("", fontContent));
                   
}
                   
datatable.DefaultColspan = 1;
                   
datatable.AddCell(new Phrase("City",
fontTitle));
                   
datatable.DefaultColspan = 1;
                   
datatable.AddCell(new Phrase(objInfo["City"].ToString(),
fontContent));
                   
datatable.DefaultColspan = 1;
                   
datatable.AddCell(new Phrase("Region",
fontTitle));
                   
datatable.DefaultColspan = 1;
                   
datatable.AddCell(new Phrase(objInfo["Region"].ToString(),
fontContent));
                   
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
BindEmployees()
        {
            DataTable objBind = new
DataTable();
           
objBind = BindData();
            if (objBind != null)
            {
               
if (objBind.Rows.Count > 0)
               
{
                   
lstEmployees.DataSource = objBind;
                   
lstEmployees.DataBind();
                   
lstEmployees.Visible = true;
               
}
               
else
               
{
                   
lstEmployees.Visible = false;
               
}
               
updatePanel.Update();
            }
        }
        private DataTable
BindData()
        {
            SqlDataProvider objSQL = new
SqlDataProvider();
            DataTable objBind = objSQL.FillTable("Select Employees.* From Employees");
            return objBind;
        }
       
#endregion
       
#region
"Datalist Methods"
        protected void
lstEmployees_ItemCommand(object sender, DataListCommandEventArgs e)
        {
            if (e.CommandName.ToLower() != "sort" & e.CommandName.ToLower() != "page")
            {
               
string[] CommandArgument =
e.CommandArgument.ToString().Split(',');
               
int EmployeeID = -1;
               
if (CommandArgument.Length > 0)
               
{
                   
EmployeeID =Convert.ToInt32(CommandArgument[0]);
               
}
               
switch (e.CommandName.ToLower())
               
{
                   
case "exportpdf":
                        if (EmployeeID>0)
                        {
                           
ExportToPDF(EmployeeID, "EmployeeInfo");
                        }
                        break;
               
}
            }
        }
        protected void
lstEmployees_ItemDataBound(object sender, DataListItemEventArgs e)
        {
            if (e.Item.ItemType == ListItemType.Item
| e.Item.ItemType == ListItemType.AlternatingItem)
            {
               
ImageButton cmdExport = (ImageButton)e.Item.FindControl("cmdExport");
               
if (cmdExport != null)
               
{
                   
cmdExport.ToolTip = "Click to
Export";
                   
ScriptManager.GetCurrent(Page).RegisterPostBackControl(cmdExport);
               
}
            }
        }
       
#endregion
       
#region
"Event Handles"
        protected void
Page_Load(object sender, System.EventArgs e)
        {
            try
            {
               
if (!IsPostBack)
               
{
                   
BindEmployees();
               
}
            }
            catch
            {
            }
        }
     
  #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 ExportRecordUsingItextsharpInDatalist
    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
            Dim bf As BaseFont = BaseFont.CreateFont(fontpath,
BaseFont.IDENTITY_H, BaseFont.EMBEDDED)
            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
               
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 = "EMPLOYEE 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 = 98
               
Dim headerwidths As Single() = {12, 38, 12, 38}
               
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_Employees_Get", New ObjectPara("@EmployeeID", ItemID))
               
If Not
objInfo Is Nothing
Then
                   
With objInfo
                        'LastName
                       
datatable.DefaultColspan = 1
                        datatable.AddCell(New Phrase("LastName", fontTitle))
                       
datatable.DefaultColspan = 1
                        datatable.AddCell(New Phrase(objInfo("LastName"), fontContent))
                        'FirstName
                        datatable.DefaultColspan
= 1
                        datatable.AddCell(New Phrase("FirstName", fontTitle))
                       
datatable.DefaultColspan = 1
                        datatable.AddCell(New Phrase(objInfo("FirstName"), fontContent))
                       
datatable.DefaultColspan = 1
                        datatable.AddCell(New Phrase("Title", fontTitle))
                       
datatable.DefaultColspan = 1
                        datatable.AddCell(New Phrase(objInfo("Title"), fontContent))
                       
datatable.DefaultColspan = 1
                        datatable.AddCell(New Phrase("TitleOfCourtesy", fontTitle))
                       
datatable.DefaultColspan = 1
                        datatable.AddCell(New Phrase(objInfo("TitleOfCourtesy"), 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
                       
datatable.DefaultColspan = 1
                        datatable.AddCell(New Phrase("City", fontTitle))
                       
datatable.DefaultColspan = 1
                        datatable.AddCell(New Phrase(objInfo("City"), fontContent))
                       
datatable.DefaultColspan = 1
                        datatable.AddCell(New Phrase("Region", fontTitle))
                       
datatable.DefaultColspan = 1
                        datatable.AddCell(New Phrase(objInfo("Region"), fontContent))
                        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
BindEmployees()
            Dim objBind As New DataTable
           
objBind = BindData()
            If Not objBind Is Nothing Then
               
If objBind.Rows.Count > 0 Then
                   
lstEmployees.DataSource = objBind
                   
lstEmployees.DataBind()
                   
lstEmployees.Visible = True
               
Else
                   
lstEmployees.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 Employees.* From Employees")
            Return objBind
        End Function
#End Region
#Region "Datalist
Methods"
        Private Sub
lstEmployees_ItemCommand(ByVal sender As Object, ByVal e As DataListCommandEventArgs) Handles
lstEmployees.ItemCommand
            If (e.CommandName.ToLower <> "sort" And
e.CommandName.ToLower <> "page")
Then
               
Dim CommandArgument() As String =
e.CommandArgument.ToString.Split(",")
               
Dim EmployeeID As
Integer = -1
               
If CommandArgument.Length > 0 Then
                   
EmployeeID = CommandArgument(0)
               
End If
               
Select Case
e.CommandName.ToLower
                   
Case "exportpdf"
                        If
EmployeeID > 0 Then
                           
ExportToPDF(EmployeeID, "EmployeeInfo")
                        End If
               
End Select
            End If
        End Sub
        Private Sub
lstEmployees_ItemDataBound(ByVal sender As Object, ByVal e As DataListItemEventArgs) Handles
lstEmployees.ItemDataBound
            If (e.Item.ItemType = ListItemType.Item
Or e.Item.ItemType = ListItemType.AlternatingItem)
Then
               
Dim cmdExport As
ImageButton = DirectCast(e.Item.FindControl("cmdExport"), ImageButton)
               
If cmdExport IsNot
Nothing Then
                   
cmdExport.ToolTip = "Click to
Export"
                   
ScriptManager.GetCurrent(Page).RegisterPostBackControl(cmdExport)
               
End If
            End If
        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
                   
BindEmployees()
               
End If
            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!
Quang Bình
 




 

























No Comment to " Sử dụng iTextSharp để Export thông tin bản ghi trong Datalist "