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

[html] view
plain copy

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。

[html] view
plain copy

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

[html] view
plain copy

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

[html] view
plain copy

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