项目需求需要生成一个PDF文档,使用的是VS2010,ASP.NET。
网络上多次搜索没有自己想要的,于是硬着头皮到itextpdf官网看英文文档,按时完成任务,以实用为主,共享一下:
使用HTML文件创建PDF模板:
使用自定义字体的一种方法:
FontFactory.Register(System.Web.HttpContext.Current.Request.PhysicalApplicationPath + "//Fonts//RAGE.TTF", "myFont");
Font myFont = FontFactory.GetFont("myFont");
BaseFont bf = myFont.BaseFont;
其中RAGE.TTF是微软操作系统自带的字体,目录在C:/Windows/Fonts,建议将需要的字体拷贝到项目中使用,否则会出现引用不到的情况。
使用自定义样式:
StyleSheet css = new StyleSheet();
Dictionary<String, String> dict= new Dictionary<string, string>();
dict.Add(HtmlTags.BGCOLOR, "#01366C");
dict.Add(HtmlTags.COLOR, "#000000");
dict.Add(HtmlTags.SIZE,"25");
css.LoadStyle("css1", dict);
这里既可以使用了StyleSheet的LoadStyle方法。
注意itextsharp对HTML元素的支持很弱,像label、div等元素的对齐、背景颜色等属性支持不好,建议使用table标签。
重写Font的GetFont方法:
public class MyFontFactory : IFontProvider
{
public Font GetFont(String fontname,String encoding, Boolean embedded, float size,int style, BaseColor color)
{
if (fontname == "微软雅黑")
{
string fontpath = System.Web.HttpContext.Current.Request.PhysicalApplicationPath + "//Fonts//MSYH.ttf";
BaseFont bf3 = BaseFont.CreateFont(fontpath, BaseFont.IDENTITY_H, BaseFont.EMBEDDED);
Font fontContent = new Font(bf3,size,style,color);
return fontContent;
}
else {
Font fontContent = FontFactory.GetFont(fontname, size, style, color);
return fontContent;
}
}
public Boolean IsRegistered(String fontname)
{
return false;
}
}
这里要想使用自定义字体需要继承IFontProvider接口,并重写Font的GetFont方法。
将自定义字体和样式表加入到文档:
Dictionary<String, Object> font = new Dictionary<string, object>();
font.Add(HTMLWorker.FONT_PROVIDER,new MyFontFactory());
List<IElement> p = HTMLWorker.ParseToList(new StreamReader(html), css,font);
使用PdfContentByte为元素加背景颜色:
PdfContentByte pcb = writer.DirectContentUnder;
pcb.SetRGBColorFill(0, 255, 0);
pcb.SetRGBColorFill(1, 54, 108);
pcb.Rectangle(20, 413, 800, 42);
pcb.Fill();
缺点显而易见,就是需要绝对坐标,小弟学疏才浅,再加时间紧迫,只能如此。如果大牛知道更好的方法,还望不吝赐教。
完整代码:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using iTextSharp.text.pdf;
using iTextSharp.text;
using System.IO;
using iTextSharp.text.html.simpleparser;
using iTextSharp.text.html;
/// <summary>
///CreatePDF 的摘要说明
/// </summary>
namespace WSE.LCPI
{
public class CreatePDF
{
public CreatePDF()
{
//
//TODO: 在此处添加构造函数逻辑
//
}
public class MyFontFactory : IFontProvider
{
public Font GetFont(String fontname,String encoding, Boolean embedded, float size,int style, BaseColor color)
{
if (fontname == "微软雅黑")
{
string fontpath = System.Web.HttpContext.Current.Request.PhysicalApplicationPath + "//LCPI//Fonts//MSYH.ttf";
BaseFont bf3 = BaseFont.CreateFont(fontpath, BaseFont.IDENTITY_H, BaseFont.EMBEDDED);
Font fontContent = new Font(bf3,size,style,color);
return fontContent;
}
else {
Font fontContent = FontFactory.GetFont(fontname, size, style, color);
return fontContent;
}
}
public Boolean IsRegistered(String fontname)
{
return false;
}
}
/// <summary>
/// 生成PDF
/// </summary>
/// <param name="html"></param>
/// <param name="fileName"></param>
/// <returns></returns>
public static Boolean HTMLToPDF(string html, String fileName)
{
Boolean isOK = false;
try
{
TextReader reader = new StringReader(html);
// step 1: creation of a document-object
Document document = new Document(PageSize.A4.Rotate(), 30, 30, 30, 30);
// step 2:
// we create a writer that listens to the document
// and directs a XML-stream to a file
fileName = System.Web.HttpContext.Current.Request.PhysicalApplicationPath + "//PDF//" + fileName+".pdf";
FileStream fs=new FileStream(fileName, FileMode.Create,FileAccess.Write,FileShare.ReadWrite);
PdfWriter writer = PdfWriter.GetInstance(document,fs );
HTMLWorker worker = new HTMLWorker(document);
document.Open();
worker.StartDocument();
StyleSheet css = new StyleSheet();
Dictionary<String, Object> font = new Dictionary<string, object>();
font.Add(HTMLWorker.FONT_PROVIDER,new MyFontFactory());
Dictionary<String, String> dict= new Dictionary<string, string>();
dict.Add(HtmlTags.BGCOLOR, "#01366C");
dict.Add(HtmlTags.COLOR, "#000000");
dict.Add(HtmlTags.SIZE,"25");
css.LoadStyle("css", dict);
List<IElement> p = HTMLWorker.ParseToList(new StreamReader(html), css,font);
for (int k = 0; k < p.Count; k++)
{
document.Add((IElement)p[k]);
}
PdfContentByte pcb = writer.DirectContentUnder;
pcb.SetRGBColorFill(0, 255, 0);
pcb.SetRGBColorFill(1, 54, 108);
pcb.Rectangle(20, 413, 800, 42);
pcb.Fill();
worker.EndDocument();
worker.Close();
document.Close();
reader.Close();
isOK = true;
}
catch (Exception ex)
{
isOK = false;
}
finally {
}
return isOK;
}
}
}