iTextSharp5.0页眉页脚及Asp.net预览的实现(PDF导出)

iTextSharp5.0后没有了HeaderFooter的类，导致页眉页脚难以实现。经查资料后，发现可以通过PdfPageEventHelper里面的OnEndPage来实现。先看看实现的效果图。



页眉和页脚部分使用PdfPTable来达成，下面是实现代码

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using iTextSharp.text;
using iTextSharp.text.pdf;

namespace ITextSharpTest
{
public class PDFBase : PdfPageEventHelper
{
#region 属性
private String _fontFilePathForHeaderFooter = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Fonts), "SIMHEI.TTF");
/// <summary>
/// 页眉/页脚所用的字体
/// </summary>
public String FontFilePathForHeaderFooter
{
get
{
return _fontFilePathForHeaderFooter;
}

set
{
_fontFilePathForHeaderFooter = value;
}
}

private String _fontFilePathForBody = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Fonts), "SIMSUN.TTC,1");
/// <summary>
/// 正文内容所用的字体
/// </summary>
public String FontFilePathForBody
{
get { return _fontFilePathForBody; }
set { _fontFilePathForBody = value; }
}

private PdfPTable _header;
/// <summary>
/// 页眉
/// </summary>
public PdfPTable Header
{
get { return _header; }
private set { _header = value; }
}

private PdfPTable _footer;
/// <summary>
/// 页脚
/// </summary>
public PdfPTable Footer
{
get { return _footer; }
private set { _footer = value; }
}

private BaseFont _baseFontForHeaderFooter;
/// <summary>
/// 页眉页脚所用的字体
/// </summary>
public BaseFont BaseFontForHeaderFooter
{
get { return _baseFontForHeaderFooter; }
set { _baseFontForHeaderFooter = value; }
}

private BaseFont _baseFontForBody;
/// <summary>
/// 正文所用的字体
/// </summary>
public BaseFont BaseFontForBody
{
get { return _baseFontForBody; }
set { _baseFontForBody = value; }
}

private Document _document;
/// <summary>
/// PDF的Document
/// </summary>
public Document Document
{
get { return _document; }
private set { _document = value; }
}

#endregion

public override void OnOpenDocument(PdfWriter writer, Document document)
{
try
{
BaseFontForHeaderFooter = BaseFont.CreateFont(FontFilePathForHeaderFooter, BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
BaseFontForBody = BaseFont.CreateFont(FontFilePathForBody, BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
Document = document;
}
catch (DocumentException de)
{

}
catch (System.IO.IOException ioe)
{

}
}

#region GenerateHeader
/// <summary>
/// 生成页眉
/// </summary>
/// <param name="writer"></param>
/// <returns></returns>
public virtual PdfPTable GenerateHeader(iTextSharp.text.pdf.PdfWriter writer)
{
return null;
}
#endregion

#region GenerateFooter
/// <summary>
/// 生成页脚
/// </summary>
/// <param name="writer"></param>
/// <returns></returns>
public virtual PdfPTable GenerateFooter(iTextSharp.text.pdf.PdfWriter writer)
{
return null;
}
#endregion

public override void OnEndPage(iTextSharp.text.pdf.PdfWriter writer, iTextSharp.text.Document document)
{
base.OnEndPage(writer, document);

//输出页眉
Header = GenerateHeader(writer);
Header.TotalWidth = document.PageSize.Width - 20f;
///调用PdfTable的WriteSelectedRows方法。该方法以第一个参数作为开始行写入。
///第二个参数-1表示没有结束行，并且包含所写的所有行。
///第三个参数和第四个参数是开始写入的坐标x和y.
Header.WriteSelectedRows(0, -1, 10, document.PageSize.Height - 20, writer.DirectContent);

//输出页脚
Footer = GenerateFooter(writer);
Footer.TotalWidth = document.PageSize.Width - 20f;
Footer.WriteSelectedRows(0, -1, 10, document.PageSize.GetBottom(50), writer.DirectContent);
}
}
}

注：为了便于使用，做了一个PDFBase，后续只需要继承即可。

using System;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Linq;
using System.Text;
using iTextSharp.text;
using iTextSharp.text.pdf;

namespace ITextSharpTest
{
/// <summary>
/// PDF报表
/// </summary>
public class PDFReport : PDFBase
{
#region 属性
private int _pageRowCount = 12;
/// <summary>
/// 每页的数据行数
/// </summary>
public int PageRowCount
{
get { return _pageRowCount; }
set { _pageRowCount = value; }
}
#endregion

/// <summary>
/// 模拟数据。实际时可能需要从数据库或网络中获取.
/// </summary>
private DataTable _dtSimulateData = null;

private DataTable GenerateSimulateData()
{
DataTable dtSimulateData = new DataTable();
dtSimulateData.Columns.Add("Order", typeof(int));//序号
dtSimulateData.Columns.Add("No");//料号
dtSimulateData.Columns.Add("Name");//名称
dtSimulateData.Columns.Add("Type");//类型
dtSimulateData.Columns.Add("GetTime");//领取时间
dtSimulateData.Columns.Add("BackTime");//归还时间
dtSimulateData.Columns.Add("Remark");//备注
DataRow row = null;
String[] types = new string[] { "文具", "辅料", "生活用品", "测试用具", "实体机" };
DateTime getDate = DateTime.Now;
DateTime backDate = DateTime.Now;
for (int i = 0; i < 100; i++)
{
row = dtSimulateData.NewRow();
row["Order"] = i + 1;
row["No"] = (10000 + i + 1).ToString();
row["Name"] = Guid.NewGuid().ToString().Substring(0, 5);//造出随机名称
row["Type"] = types[(i * 3) % 5];
row["GetTime"] = getDate.AddDays(i).ToString("yyyy-MM-dd");
row["BackTime"] = ((i + i) % 3 == 0) ? "" : (backDate.AddDays(i + (i * 3) % 8).ToString("yyyy-MM-dd"));//造出没有归还时间的数据
row["Remark"] = "XXXXXXX";
dtSimulateData.Rows.Add(row);
}
return dtSimulateData;
}

#region GenerateHeader
/// <summary>
/// 生成页眉
/// </summary>
/// <param name="fontFilePath"></param>
/// <param name="pageNumber"></param>
/// <returns></returns>
public override PdfPTable GenerateHeader(iTextSharp.text.pdf.PdfWriter writer)
{
BaseFont baseFont = BaseFontForHeaderFooter;
iTextSharp.text.Font font_logo = new iTextSharp.text.Font(baseFont, 30, iTextSharp.text.Font.BOLD);
iTextSharp.text.Font font_header1 = new iTextSharp.text.Font(baseFont, 16, iTextSharp.text.Font.BOLD);
iTextSharp.text.Font font_header2 = new iTextSharp.text.Font(baseFont, 12, iTextSharp.text.Font.BOLD);
iTextSharp.text.Font font_headerContent = new iTextSharp.text.Font(baseFont, 12, iTextSharp.text.Font.NORMAL);

float[] widths = new float[] { 55, 300, 50, 90, 15, 20, 15 };

PdfPTable header = new PdfPTable(widths);
PdfPCell cell = new PdfPCell();
cell.BorderWidthBottom = 2;
cell.BorderWidthLeft = 2;
cell.BorderWidthTop = 2;
cell.BorderWidthRight = 2;
cell.FixedHeight = 35;
cell.Phrase = new Phrase("LOGO", font_logo);
cell.HorizontalAlignment = iTextSharp.text.Element.ALIGN_CENTER;
cell.VerticalAlignment = iTextSharp.text.Element.ALIGN_CENTER;
cell.PaddingTop = -1;
header.AddCell(cell);

cell = GenerateOnlyBottomBorderCell(2, iTextSharp.text.Element.ALIGN_LEFT);
cell.Phrase = new Paragraph("PDF报表示例", font_header1);
header.AddCell(cell);

cell = GenerateOnlyBottomBorderCell(2, iTextSharp.text.Element.ALIGN_RIGHT);
cell.Phrase = new Paragraph("日期:", font_header2);
header.AddCell(cell);

cell = GenerateOnlyBottomBorderCell(2, iTextSharp.text.Element.ALIGN_LEFT);
cell.Phrase = new Paragraph("2015-07-27", font_headerContent);
header.AddCell(cell);

cell = GenerateOnlyBottomBorderCell(2, iTextSharp.text.Element.ALIGN_RIGHT);
cell.Phrase = new Paragraph("第", font_header2);
header.AddCell(cell);

cell = GenerateOnlyBottomBorderCell(2, iTextSharp.text.Element.ALIGN_CENTER);
cell.Phrase = new Paragraph(writer.PageNumber.ToString(), font_headerContent);
header.AddCell(cell);

cell = GenerateOnlyBottomBorderCell(2, iTextSharp.text.Element.ALIGN_RIGHT);
cell.Phrase = new Paragraph("页", font_header2);
header.AddCell(cell);
return header;
}

#region GenerateOnlyBottomBorderCell
/// <summary>
/// 生成只有底边的cell
/// </summary>
/// <param name="bottomBorder"></param>
/// <param name="horizontalAlignment">水平对齐方式<see cref="iTextSharp.text.Element"/></param>
/// <returns></returns>
private PdfPCell GenerateOnlyBottomBorderCell(int bottomBorder,
int horizontalAlignment)
{
PdfPCell cell = GenerateOnlyBottomBorderCell(bottomBorder, horizontalAlignment, iTextSharp.text.Element.ALIGN_BOTTOM);
cell.PaddingBottom = 5;
return cell;
}

/// <summary>
/// 生成只有底边的cell
/// </summary>
/// <param name="bottomBorder"></param>
/// <param name="horizontalAlignment">水平对齐方式<see cref="iTextSharp.text.Element"/></param>
/// <param name="verticalAlignment">垂直对齐方式<see cref="iTextSharp.text.Element"/</param>
/// <returns></returns>
private PdfPCell GenerateOnlyBottomBorderCell(int bottomBorder,
int horizontalAlignment,
int verticalAlignment)
{
PdfPCell cell = GenerateOnlyBottomBorderCell(bottomBorder);
cell.HorizontalAlignment = horizontalAlignment;
cell.VerticalAlignment = verticalAlignment; ;
return cell;
}

/// <summary>
/// 生成只有底边的cell
/// </summary>
/// <param name="bottomBorder"></param>
/// <returns></returns>
private PdfPCell GenerateOnlyBottomBorderCell(int bottomBorder)
{
PdfPCell cell = new PdfPCell();
cell.BorderWidthBottom = 2;
cell.BorderWidthLeft = 0;
cell.BorderWidthTop = 0;
cell.BorderWidthRight = 0;
return cell;
}
#endregion

#endregion

#region GenerateFooter
public override PdfPTable GenerateFooter(iTextSharp.text.pdf.PdfWriter writer)
{
BaseFont baseFont = BaseFontForHeaderFooter;
iTextSharp.text.Font font = new iTextSharp.text.Font(baseFont, 10, iTextSharp.text.Font.NORMAL);

PdfPTable footer = new PdfPTable(3);
AddFooterCell(footer, "审阅:", font);
AddFooterCell(footer, "审批:", font);
AddFooterCell(footer, "制表:张三", font);
return footer;
}

private void AddFooterCell(PdfPTable foot, String text, iTextSharp.text.Font font)
{
PdfPCell cell = new PdfPCell();
cell.BorderWidthTop = 2;
cell.BorderWidthRight = 0;
cell.BorderWidthBottom = 0;
cell.BorderWidthLeft = 0;
cell.Phrase = new Phrase(text, font);
cell.HorizontalAlignment = iTextSharp.text.Element.ALIGN_CENTER;
foot.AddCell(cell);
}
#endregion

#region ExportPDF
/// <summary>
/// 导出PDF
/// </summary>
/// <param name="path">导出路径</param>
public static void ExportPDF(String path)
{
PDFReport pdfReport = new PDFReport();
Document document = new Document(PageSize.A4.Rotate(), -90, -90, 60, 10);//此处设置的偏移量是为了加大页面的可用范围，可以使用默认.
PdfWriter pdfWriter = PdfWriter.GetInstance(document, new FileStream(path, FileMode.Create));
pdfWriter.PageEvent = pdfReport;//此处一定要赋值，才能触发页眉和页脚的处理
document.Open();
pdfReport.AddBody(document);
document.Close();
}

/// <summary>
/// 导出PDF
/// </summary>
/// <param name="path">导出路径</param>
public static byte[] ExportPDF()
{
PDFReport pdfReport = new PDFReport();
Document document = new Document(PageSize.A4.Rotate(), -90, -90, 60, 10);//此处设置的偏移量是为了加大页面的可用范围，可以使用默认.
MemoryStream ms = new MemoryStream();
PdfWriter pdfWriter = PdfWriter.GetInstance(document, ms);
pdfWriter.PageEvent = pdfReport;//此处一定要赋值，才能触发页眉和页脚的处理
document.Open();
pdfReport.AddBody(document);
document.Close();
byte[] buff = ms.ToArray();
return buff;
}
#endregion

#region AddBody
private void AddBody(Document document)
{
_dtSimulateData = GenerateSimulateData();
int count = (_dtSimulateData.Rows.Count + (PageRowCount - 1)) / PageRowCount;
for (int i = 0; i < count; i++)
{
AddBodySinglePage(i + 1);
document.NewPage();
}
}

private void AddBodySinglePage(int pageNumber)
{
BaseFont baseFont = BaseFontForBody;
iTextSharp.text.Font font_columnHeader = new iTextSharp.text.Font(baseFont, 11f, iTextSharp.text.Font.BOLD);
iTextSharp.text.Font font_contentNormal = new iTextSharp.text.Font(baseFont, 9.5f, iTextSharp.text.Font.NORMAL);
iTextSharp.text.Font font_contentSmall = new iTextSharp.text.Font(baseFont, 8f, iTextSharp.text.Font.NORMAL);

int columnCount = 6;//此处是为了当列数很多时，便于循环生成所要的列宽比例
float[] widths = new float[columnCount];
for (int i = 0; i < columnCount; i++)
{
widths[i] = 1;
}
//需要加宽的再进行额外处理
widths[3] = 2;//时间
widths[4] = 3;//备注

PdfPTable bodyTable = new PdfPTable(widths);
bodyTable.SpacingBefore = 10;//与头部的距离

AddBodyHeader(bodyTable, font_columnHeader);
AddBodyContent(bodyTable, font_contentNormal, font_contentSmall, pageNumber);

Document.Add(bodyTable);
}

#region AddBodyHeader
/// <summary>
/// 添加Body的列标题
/// </summary>
/// <param name="document"></param>
/// <param name="font_columnHeader"></param>
private void AddBodyHeader(PdfPTable bodyTable, iTextSharp.text.Font font_columnHeader)
{
//采用Rowspan和Colspan来控制单元格的合并与拆分，类似于HTML的Table.
AddColumnHeaderCell(bodyTable, "料号", font_columnHeader, 1, 2);
AddColumnHeaderCell(bodyTable, "名称", font_columnHeader, 1, 2);
AddColumnHeaderCell(bodyTable, "种类", font_columnHeader, 1, 2);
AddColumnHeaderCell(bodyTable, "时间", font_columnHeader, 2, 1);//表头下还有两列表头
AddColumnHeaderCell(bodyTable, "备注", font_columnHeader, 1, 2, true, true);

//时间
AddColumnHeaderCell(bodyTable, "领取", font_columnHeader);
AddColumnHeaderCell(bodyTable, "归还", font_columnHeader, true, true);
}
#endregion

#region AddBodyContent Function
/// <summary>
/// 添加报表正文
/// </summary>
/// <param name="bodyTable"></param>
/// <param name="fontNormal">普通字体</param>
/// <param name="fontSmall">小字体，当内容显示不下，需要使用小字体来显示时，可以使用.</param>
/// <param name="pageNumber">页码。便于从数据库中按页拉取数据时使用.</param>
public void AddBodyContent(PdfPTable bodyTable,
iTextSharp.text.Font fontNormal,
iTextSharp.text.Font fontSmall,
int pageNumber)
{
String filterExpression = String.Format("Order>{0} AND Order<={1}",
(pageNumber - 1) * PageRowCount,
pageNumber * PageRowCount);
DataRow[] rows = _dtSimulateData.Select(filterExpression);
foreach (var row in rows)
{
AddBodyContentRow(bodyTable, fontNormal, fontSmall, row);
}
}

private void AddBodyContentRow(PdfPTable bodyTable, iTextSharp.text.Font fontNormal, iTextSharp.text.Font fontSmall, DataRow row)
{
AddBodyContentCell(bodyTable, String.Format("{0}", row["No"]), fontNormal);//料号
AddBodyContentCell(bodyTable, String.Format("{0}", row["Name"]), fontNormal);//名称
AddBodyContentCell(bodyTable, String.Format("{0}", row["Type"]), fontNormal);//种类
AddBodyContentCell(bodyTable, String.Format("{0}", row["GetTime"]), fontSmall, 1);//时间-领取
String backTime = String.Format("{0}", row["BackTime"]);
AddBodyContentCell(bodyTable, backTime, fontSmall);//时间-归还
AddBodyContentCell(bodyTable, String.Format("{0}", row["Remark"]), fontSmall, 2, true);//备注

AddBodyContentCell(bodyTable, (String.IsNullOrWhiteSpace(backTime)) ? "消耗品不需归还" : "", fontSmall, 1);//时间-领取(下方说明)
}

private static void AddBodyContentCell(PdfPTable bodyTable,
String text,
iTextSharp.text.Font font,
int rowspan = 2,
bool needRightBorder = false)
{
PdfPCell cell = new PdfPCell();
float defaultBorder = 0.5f;
cell.BorderWidthLeft = defaultBorder;
cell.BorderWidthTop = 0;
cell.BorderWidthRight = needRightBorder ? defaultBorder : 0;
cell.BorderWidthBottom = defaultBorder;
cell.HorizontalAlignment = iTextSharp.text.Element.ALIGN_CENTER;
cell.VerticalAlignment = iTextSharp.text.Element.ALIGN_BASELINE;
cell.Rowspan = rowspan;
cell.PaddingBottom = 4;
cell.Phrase = new Phrase(text, font);
cell.FixedHeight = 18f;
bodyTable.AddCell(cell);
}
#endregion

#region AddColumnHeaderCell Function
/// <summary>
/// 添加列标题单元格
/// </summary>
/// <param name="table">表格行的单元格列表</param>
/// <param name="header">标题</param>
/// <param name="font">字段</param>
/// <param name="colspan">列空间</param>
/// <param name="rowspan">行空间</param>
/// <param name="needLeftBorder">是否需要左边框</param>
/// <param name="needRightBorder">是否需要右边框</param>
public void AddColumnHeaderCell(PdfPTable table,
String header,
iTextSharp.text.Font font,
int colspan,
int rowspan,
bool needLeftBorder = true,
bool needRightBorder = false)
{
PdfPCell cell = GenerateColumnHeaderCell(header, font, needLeftBorder, needRightBorder);
if (colspan > 1)
{
cell.Colspan = colspan;
}

if (rowspan > 1)
{
cell.Rowspan = rowspan;
}

table.AddCell(cell);
}

/// <summary>
/// 添加列标题单元格
/// </summary>
/// <param name="table">表格</param>
/// <param name="header">标题</param>
/// <param name="font">字段</param>
/// <param name="needLeftBorder">是否需要左边框</param>
/// <param name="needRightBorder">是否需要右边框</param>
public void AddColumnHeaderCell(PdfPTable table,
String header,
iTextSharp.text.Font font,
bool needLeftBorder = true,
bool needRightBorder = false)
{
PdfPCell cell = GenerateColumnHeaderCell(header, font, needLeftBorder, needRightBorder);
table.AddCell(cell);
}
#endregion

#region GenerateColumnHeaderCell
/// <summary>
/// 生成列标题单元格
/// </summary>
/// <param name="header">标题</param>
/// <param name="font">字段</param>
/// <param name="needLeftBorder">是否需要左边框</param>
/// <param name="needRightBorder">是否需要右边框</param>
/// <returns></returns>
private PdfPCell GenerateColumnHeaderCell(String header,
iTextSharp.text.Font font,
bool needLeftBorder = true,
bool needRightBorder = false)
{
PdfPCell cell = new PdfPCell();
float border = 0.5f;
cell.BorderWidthBottom = border;
if (needLeftBorder)
{
cell.BorderWidthLeft = border;
}
else
{
cell.BorderWidthLeft = 0;
}

cell.BorderWidthTop = border;
if (needRightBorder)
{
cell.BorderWidthRight = border;
}
else
{
cell.BorderWidthRight = 0;
}

cell.HorizontalAlignment = iTextSharp.text.Element.ALIGN_CENTER;
cell.VerticalAlignment = iTextSharp.text.Element.ALIGN_BASELINE;
cell.PaddingBottom = 4;
cell.Phrase = new Phrase(header, font);
return cell;
}
#endregion

#endregion
}
}

注：代码对关键调用作了注释。

Asp.net中的调用

public partial class _default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
byte[] buff = PDFReport.ExportPDF();
Response.ContentType = "application/pdf";
Response.BinaryWrite(buff);
}
}
}

WinForm中的调用

private void btnExportPdf_Click(object sender, EventArgs e)
{
try
{

String path = textBoxPath.Text;
if (String.IsNullOrWhiteSpace(path))
{
MessageBox.Show("请输入路径");
return;
}

if (!Directory.Exists(Path.GetDirectoryName(path)))
{
MessageBox.Show("指定的目录不存在");
return;
}

if (".PDF" != Path.GetExtension(path).ToUpper())
{
path = path + ".pdf";
}
PDFReport.ExportPDF(path);
MessageBox.Show("导出成功");
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}

源码下载http://download.csdn.net/detail/xxdddail/8943371

转载请注明出处http://blog.csdn.net/xxdddail/article/details/47128319