无法显示PDF标头Itextsharp [英] PDF header doesnt get displayed Itextsharp

问题描述

我通过使用itextsharp解析html来编写一些pdf，它工作正常，但我想在pdf的每一页上添加页码.为此，我要在其中添加带有伪文本的标头(以后我将其替换为页数)并写入圆顶内容，但该内容不会显示..

try
{
     Document oNewDocument = new Document(PageSize.A4, 20f, 20f, 30f, 10f);
     PdfWriter.GetInstance(oNewDocument, new FileStream(pdfpath + "/" + sSaleInvoicePdf, FileMode.Create)); 
     string content = "Some HTML Content";
     List<IElement> parsedHtmlElements = HTMLWorker.ParseToList(new StringReader(contents), styles);
     oNewDocument.AddHeader("text","text");

     foreach (var htmlElement in parsedHtmlElements)
     {
          oNewDocument.Add(htmlElement as IElement);
     }
}
catch (Exception ex)
{
     Response.Write(ex.Message);
}
finally
{
     oNewDocument.Close();
}

我很疲倦.此代码生成所有html内容，但不生成标题文本..??

解决方案

版本5以上，您必须通过页面事件来完成此操作:

处理页眉页脚事件，itextsharp 5+

在版本5之前，其工作方式如下:

Document oNewDocument = new Document(PageSize.A4, 20f, 20f, 30f, 10f);
PdfWriter.GetInstance(oNewDocument, new FileStream(pdfpath + "/" + sSaleInvoicePdf, FileMode.Create));  

//Create some text to add to the header
Chunk text= new Chunk("my text");
Phrase phHeader = new Phrase();
phHeader.Add(text);

//Assign the Phrase to PDF Header
HeaderFooter header = new HeaderFooter(phHeader, false);

//Add the header to the document
oNewDocument.Header = header;

Hi I am writng some pdf by parsing html to it using itextsharp and it is working fine but I want to add page number on each every page of the pdf. for this I am adding header with dummy text in it(later I will replace it with page count) and writing dome content but the content is not displayed ..

try
{
     Document oNewDocument = new Document(PageSize.A4, 20f, 20f, 30f, 10f);
     PdfWriter.GetInstance(oNewDocument, new FileStream(pdfpath + "/" + sSaleInvoicePdf, FileMode.Create)); 
     string content = "Some HTML Content";
     List<IElement> parsedHtmlElements = HTMLWorker.ParseToList(new StringReader(contents), styles);
     oNewDocument.AddHeader("text","text");

     foreach (var htmlElement in parsedHtmlElements)
     {
          oNewDocument.Add(htmlElement as IElement);
     }
}
catch (Exception ex)
{
     Response.Write(ex.Message);
}
finally
{
     oNewDocument.Close();
}

where I am worng. this code generate all the html content but not header text..??

解决方案

Version 5+ you have to do this with a page event:

Handling header footer page event, itextsharp 5+

Before version 5 it works like:

Document oNewDocument = new Document(PageSize.A4, 20f, 20f, 30f, 10f);
PdfWriter.GetInstance(oNewDocument, new FileStream(pdfpath + "/" + sSaleInvoicePdf, FileMode.Create));  

//Create some text to add to the header
Chunk text= new Chunk("my text");
Phrase phHeader = new Phrase();
phHeader.Add(text);

//Assign the Phrase to PDF Header
HeaderFooter header = new HeaderFooter(phHeader, false);

//Add the header to the document
oNewDocument.Header = header;

这篇关于无法显示PDF标头Itextsharp的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！