ITextSharp pdf调整大小和数据对齐 [英] ITextSharp pdf resize and data alignment

问题描述

我正在使用ITextSharp将HTML转换为PDF，但我希望生成宽度为5厘米的PDF。我使用了以下代码

I am using ITextSharp to convert HTML to PDF but i want the PDF to be generated of size 5cm width. I used the following code

var pgSize = new iTextSharp.text.Rectangle(2.05f, 2.05f);
Document doc = new Document(pgSize);

但它只是调整pdf的大小，我的数据在pdf或get hide中消失了。
如何在PDF中心对齐数据或调整pdf大小？这是我的代码
public void ConvertHTMLToPDF（string HTMLCode）
{

but it is just resizing the pdf and my data disappeared in the pdf or get hide. How can i align the data in the center in PDF or resize the pdf? Here is my code public void ConvertHTMLToPDF(string HTMLCode) {

        try
        {
            System.IO.StringWriter stringWrite = new StringWriter();
            System.Web.UI.HtmlTextWriter htmlWrite = new HtmlTextWriter(stringWrite);

            StringReader reader = new StringReader(HTMLCode);

            var pgSize = new iTextSharp.text.Rectangle(2.05f, 2.05f);                
            Document doc = new Document(pgSize);
            HTMLWorker parser = new HTMLWorker(doc);

            PdfWriter.GetInstance(doc, new FileStream(Server.MapPath("~") + "/App_Data/HTMLToPDF.pdf",
            FileMode.Create));
            doc.Open();
            foreach (IElement element in HTMLWorker.ParseToList(
            new StringReader(HTMLCode), null))
            {

                doc.Add(element);
            }

            doc.Close();
            Response.End();
        }
        catch (Exception ex)
        {

        }
    }

推荐答案

您正在创建一个尺寸为0.0723厘米×0.0723厘米的PDF。这太小了，无法添加任何内容。如果要创建5厘米x 5厘米的PDF，则需要创建如下文档：

You are creating a PDF that measures 0.0723 cm by 0.0723 cm. That is much too small to add any content. If you want to create a PDF of 5 cm by 5 cm, you need to create your document like this:

var pgSize = new iTextSharp.text.Rectangle(141.732f, 141.732f);
Document doc = new Document(pgSize);

至于对齐，应该在HTML中定义，但是你使用的是旧版本的iText和你使用的是已弃用的 HTMLWorker 。

As for the alignment, that should be defined in the HTML, but you are using an old version of iText and you are using the deprecated HTMLWorker.

你应该升级到iText 7和pdfHTML，如下所述：< a href =https://stackoverflow.com/questions/47895935/converting-html-to-pdf-using-itext/47896272#47896272>使用iText将HTML转换为PDF

You should upgrade to iText 7 and pdfHTML as described here: Converting HTML to PDF using iText

另外：页面的大小可以在CSS的 @page -rule中定义。请参阅标题后的巨大空格使用飞碟

Also: the size of the page can be defined in the @page-rule of the CSS. See Huge white space after header in PDF using Flying Saucer

当新版本允许你这样做时，为什么你会使用旧的iText版本让自己变得困难：

Why would you make it difficult for yourself by using an old iText version, when the new version allows you to do this:

@page {
  size: 5cm 5cm;
}

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