iTextSharp 生成 PDF 问题集合

最近要制作 asp.net  生成 PDF 项目，在网上找一些相关资料发现 iTextSharp 这个 dll 生成PDF 还是不错的，

在开发中遇到很多问题，在网上也找了不少的资料，在这汇总了一个知识点，在关键的地方做了一些注释希望能给园里的朋友带来一些帮助。

using System;
using System.Web;
using System.IO;
using iTextSharp.text;
using iTextSharp.text.pdf;



public class Pdf : IHttpHandler
{

    public void ProcessRequest(HttpContext context)
    {   
             
        Rectangle rect = new Rectangle(8.5f * 72, 11 * 72); //自己设置 纸张大小
        Document document = new Document(rect, 20, 20, 80, 20);

        //Document document = new Document(PageSize.A4);  //可以按照指定纸张大小
        
        string pdfFile = context.Server.MapPath("sample.pdf");
        PdfWriter.GetInstance(document, new FileStream(pdfFile, FileMode.Create));
        document.Open();

        //设置 document 背景图
        string imgPath = context.Server.MapPath("../images/2012/bg2.png");
        Image image = Image.GetInstance(imgPath);
        image.SetAbsolutePosition(0, 0);
        image.Alignment = Image.ALIGN_UNDEFINED;
        image.ScaleAbsolute(image.Width, image.Height);
        document.Add(image);


        //设置PDF 文档属性
        document.AddAuthor("junny");
        document.AddCreationDate();
        document.AddCreator("SBS.inc");
        document.AddHeader("Email", "junny_sa@163.com");
        document.AddKeywords(" PDF ");
        document.AddProducer();
        document.AddSubject(" This is Subject");
        document.AddTitle(" This is Title ");

        //设置中文字体
        BaseFont baseFont = CreateChineseFont();
        //设置字体的类型
        iTextSharp.text.Font titleFont = new iTextSharp.text.Font(baseFont, 18, Font.BOLD);
        iTextSharp.text.Font normalFont = new iTextSharp.text.Font(baseFont, 12), normalBoldFont = new iTextSharp.text.Font(baseFont, 10, Font.BOLD);
        iTextSharp.text.Font normalRedFont = new iTextSharp.text.Font(baseFont, 10, Font.NORMAL | Font.BOLD, BaseColor.RED);

        
        
        //设置一个空白换行
        float normalLineHeight = 25f;
        Paragraph pBlank = new Paragraph(" ", normalFont);
        pBlank.Leading = normalLineHeight;
        document.Add(pBlank);
        
        
        float[] widths = new float[] { 12f, 140f, 35f };
        float padding = 3f;
        BaseColor bgColor = new BaseColor(153, 204, 255); //设置背景色

        PdfPTable table = new PdfPTable(3);   //设置为三列表格                    
        table.SetWidths(widths);
        table.AddCell(CreateCellHeader(" Create PDF ", titleFont, 3, padding, padding, bgColor));


        string[] ID_Arr = { "1", "2", "3" };
        string[] name_Arr = { "junny", "kendy", "sally" };
        string[] phone_Arr = { "178-894-7893", "378-822-7289", "221-842-9874" };

        table.AddCell(CreateCell("ID", normalFont, false, 1, 0, padding, padding));
        table.AddCell(CreateCell("Name", normalFont, false, 0, 0, padding, padding));
        table.AddCell(CreateCell("Phone", normalFont,false, 0, 0, padding, padding));

        for (int i = 0; i < 3; i++)
        {
            table.AddCell(CreateCell(ID_Arr[i],normalFont,true,0,0,padding,padding));
            table.AddCell(CreateCell(name_Arr[i], normalFont,false, 0, 0, padding, padding));
            table.AddCell(CreateCell(phone_Arr[i], normalFont,false, 0, 0, padding, padding));
        }

        
        document.Add(table);
        document.Close();        

    }

}

CreateCell 方法

    /// <summary>
    /// 创建Table行
    /// </summary>
    /// <param name="txt">文本</param>
    /// <param name="txtFont">字体</param>
    /// <param name="image">是否添加图片</param>
    /// <param name="align">对齐方式</param>
    /// <param name="colSpan">跨行数</param>
    /// <param name="padTop">顶部padding</param>
    /// <param name="padBottom">底部padding</param>
    /// <returns>Table行</returns>
    public static PdfPCell CreateCell(string txt, Font txtFont,bool image, int align, int colSpan, float padTop, float padBottom)
    {
        PdfPCell cell = new PdfPCell();
        Phrase ph = new Phrase(txt, txtFont);

        //这里是添加图片的例子，顺带说一下在表格里加图片会换行问题，按照以下方法，图片会跟在文字后面
        if (image)
        {
            Image IMG = Image.GetInstance(HttpContext.Current.Server.MapPath("../images/view_add.png"));
            Chunk ck = new Chunk(IMG, 4, -4); //图片可设置 偏移
            ph.Add(ck);
        }

        cell.AddElement(ph);
        
        if (padTop > 0) { cell.PaddingTop = padTop; }
        if (padBottom > 0) { cell.PaddingBottom = padBottom; }
        if (colSpan > 0) { cell.Colspan = colSpan; }
        //cell.Border = 0; 设置表格线
        cell.HorizontalAlignment = align;
        return cell;
    }

CreateCellHeader 方法

    /// <summary>
    /// 创建Table行
    /// </summary>
    /// <param name="txt">文本</param>
    /// <param name="txtFont">字体</param>
    /// <param name="colSpan">跨行数</param>
    /// <param name="padTop">顶部padding</param>
    /// <param name="padBottom">底部padding</param>
    /// <param name="bgColor">背景色</param>
    /// <returns>Table行</returns>
    public static PdfPCell CreateCellHeader(string txt, Font txtfont, int colSpan, float padTop, float padBottom, BaseColor bgColor)
    {
        PdfPCell cell = new PdfPCell(new Phrase(txt, txtfont));
        if (padTop > 0) { cell.PaddingTop = padTop; }
        if (padBottom > 0) { cell.PaddingBottom = padBottom; }
        if (colSpan > 0) { cell.Colspan = colSpan; }
        //cell.Border = 0;
        cell.HorizontalAlignment = Element.ALIGN_CENTER; //0=Left, 1=Centre, 2=Right
        cell.VerticalAlignment = Element.ALIGN_MIDDLE;
        cell.BackgroundColor = bgColor;
        return cell;
    }

//设置中文字体

public static BaseFont CreateChineseFont()
{

*/
//这里设置 黑体 字类型，
return BaseFont.CreateFont(@"c:\windows\fonts\SIMHEI.TTF", BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
}

示例图：