使用iTextSharp的(或C#PDF库),如何打开一个PDF,替换一些文本,然后再保存呢? [英] Using itextsharp (or any c# pdf library), how to open a PDF, replace some text, and save it again?
问题描述
使用iTextSharp的(或C#PDF库),我需要打开一个PDF,请用实际值一些占位符文本,并返回它作为一个byte []。
可有人建议如何做到这一点?我有一个看iText的文档和不能找出哪里开始。到目前为止,我是卡在如何从PDFReader获得源代码的PDF文档对象吧,我想我可能接近这个错误的方式。
谢谢很多
解决方案
在最后,我用PDFescape打开我现有的PDF文件,并将其放置在我需要在那里某种形式的字段
然后我发现关于如何更换表单字段此博客条目:
所有工作得很好!下面的代码:
公共静态的byte []生成()
{
变种的templatePath = HttpContext的。 Current.Server.MapPath(〜/ my_template.pdf);
//基于:
// http://www.johnnycode.com/blog/2010/03/05/using-a-template-to-programmatically-create-pdfs -with-C-和iTextSharp的/
变种读卡器=新PdfReader(的templatePath);
变种outStream =新的MemoryStream();
变种模子=新PdfStamper(读卡器,outStream);
变种形式= stamper.AcroFields;
VAR fieldKeys = form.Fields.Keys;
的foreach(在fieldKeys串fieldKey)
{
如果(form.GetField(fieldKey)==MyTemplatesOriginalTextFieldA)
form.SetField(fieldKey,1234 );
如果(form.GetField(fieldKey)==MyTemplatesOriginalTextFieldB)
form.SetField(fieldKey,5678);
}
//拼合的形式,以便它不会是编辑/可用了
stamper.FormFlattening = TRUE;
stamper.Close();
reader.Close();
返回outStream.ToArray();
}
Using itextsharp (or any c# pdf library), i need to open a PDF, replace some placeholder text with actual values, and return it as a byte[].
Can someone suggest how to do this? I've had a look at the itext docs and can't figure out where to get started. So far i'm stuck on how to get the source pdf from a PDFReader to a Document object, i presume i'm probably approaching this the wrong way.
Thanks a lot
In the end, i used PDFescape to open my existing PDF file, and place some form fields in where i need to put my fields, then save it again to create my PDF file.
Then i found this blog entry about how to replace form fields:
All works nicely! Here's the code:
public static byte[] Generate()
{
var templatePath = HttpContext.Current.Server.MapPath("~/my_template.pdf");
// Based on:
// http://www.johnnycode.com/blog/2010/03/05/using-a-template-to-programmatically-create-pdfs-with-c-and-itextsharp/
var reader = new PdfReader(templatePath);
var outStream = new MemoryStream();
var stamper = new PdfStamper(reader, outStream);
var form = stamper.AcroFields;
var fieldKeys = form.Fields.Keys;
foreach (string fieldKey in fieldKeys)
{
if (form.GetField(fieldKey) == "MyTemplatesOriginalTextFieldA")
form.SetField(fieldKey, "1234");
if (form.GetField(fieldKey) == "MyTemplatesOriginalTextFieldB")
form.SetField(fieldKey, "5678");
}
// "Flatten" the form so it wont be editable/usable anymore
stamper.FormFlattening = true;
stamper.Close();
reader.Close();
return outStream.ToArray();
}
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