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提问者：小点点

使用iText7 pdfHTML在所有PDF页面上添加页眉和页脚


我正在学习如何使用iText7 pdfHTML将超文本标记语言文件转换为PDF。到目前为止，我已经能够生成漂亮的PDF，但现在我正在努力尝试为所有PDF页面添加页眉和页脚。这些页眉和页脚是从超文本标记语言标记生成的，它们有点复杂（即一些图像、表格或div，而不仅仅是纯文本）。源超文本语言标记是由我自己的代码生成的，所以我可以控制源文件的内容。

我读过iText这本书，特别是关于用pdfHTML将超文本标记语言转换为PDF的章节。事实上，我可以使用@pageCSS规则添加标题，并为转换器属性设置MediaDevice描述（MediaType. PRINT）。这是我用于测试的超文本标记语言：

<!DOCTYPE html>
<html>
<head>
        <style>
            #footer {
                position: running(footer);
            }

            @page {
                @bottom-left {
                        content: "Page " counter(page) " of " counter(pages);
                }
                @bottom-center {
                        content: element(footer);
                }
                @bottom-right {
                        content: "Page " counter(page) " of " counter(pages);
                }
            }
        </style>
</head>
<body>
<div style="width: 100%; border: 1px dashed black;">
<p><img src="data:image/jpg;base64, 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"/>
<div style="background-color: yellow; width: 100%; height: 1200px">&nbsp</div>
<p><img src="data:image/jpg;base64, /9j/4AAQSkZJRgABAQEAYABgAAD/2wBDAAIBAQIBAQICAgICAgICAwUDAwMDAwYEBAMFBwYHBwcGBwcICQsJCAgKCAcHCg0KCgsMDAwMBwkODw0MDgsMDAz/2wBDAQICAgMDAwYDAwYMCAcIDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAz/wAARCACXAJcDASIAAhEBAxEB/8QAHwAAAQUBAQEBAQEAAAAAAAAAAAECAwQFBgcICQoL/8QAtRAAAgEDAwIEAwUFBAQAAAF9AQIDAAQRBRIhMUEGE1FhByJxFDKBkaEII0KxwRVS0fAkM2JyggkKFhcYGRolJicoKSo0NTY3ODk6Q0RFRkdISUpTVFVWV1hZWmNkZWZnaGlqc3R1dnd4eXqDhIWGh4iJipKTlJWWl5iZmqKjpKWmp6ipqrKztLW2t7i5usLDxMXGx8jJytLT1NXW19jZ2uHi4+Tl5ufo6erx8vP09fb3+Pn6/8QAHwEAAwEBAQEBAQEBAQAAAAAAAAECAwQFBgcICQoL/8QAtREAAgECBAQDBAcFBAQAAQJ3AAECAxEEBSExBhJBUQdhcRMiMoEIFEKRobHBCSMzUvAVYnLRChYkNOEl8RcYGRomJygpKjU2Nzg5OkNERUZHSElKU1RVVldYWVpjZGVmZ2hpanN0dXZ3eHl6goOEhYaHiImKkpOUlZaXmJmaoqOkpaanqKmqsrO0tba3uLm6wsPExcbHyMnK0tPU1dbX2Nna4uPk5ebn6Onq8vP09fb3+Pn6/9oADAMBAAIRAxEAPwD5Pooor/RA+DCiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKAP/2Q=="/></p>
</div>
<div id="footer">
<table style="width: 100%; font-size: 12px; line-height: 1;">
<tbody>
<tr>
<td style="text-align: right; width: 50%; padding: 0;">ACME Inc.</td>
<td style="width: 5px; padding: 0;">&nbsp;</td>
<td style="padding: 0;">&nbsp;</td>
</tr>
<tr>
<td style="text-align: right; padding: 0;">CIF: 12345678Z</td>
<td style="width: 5px; padding: 0;">&nbsp;</td>
<td style="padding: 0;">https://acme.inc</td>
</tr>
<tr>
<td style="text-align: right; padding: 0;">C/Rue del Percebe, 13</td>
<td style="width: 5px; padding: 0;">&nbsp;</td>
<td style="padding: 0;">Tel.: +44 555 123 123</td>
</tr>
<tr>
<td style="text-align: right; padding: 0;">45321 Virginia</td>
<td style="width: 5px; padding: 0;">&nbsp;</td>
<td style="padding: 0;">Fax: +44 555 321 321</td>
</tr>
<tr>
<td style="text-align: right; padding: 0;">Virginia - USA</td>
<td style="width: 5px; padding: 0;">&nbsp;</td>
<td style="padding: 0;">info@acme.inc</td>
</tr>
</tbody>
</table>
</div>
</body>
</html>

如您所见，我正在尝试将div#footer元素放置在所有PDF页面的底部（中心）。然而，尽管左侧和右侧文本都放置在所有页脚上，但#footer元素仅显示在最后一个上，它并不完全适合页面。

这是我用来从超文本标记语言生成PDF的代码：

 public MemoryStream CreatePdf()
        {
            MemoryStream pdfStream = new MemoryStream();
            float marginTop = 20, marginRight = 20, marginBottom = 20, marginLeft = 20;

            ConverterProperties converterProps = new ConverterProperties();
            converterProps.SetMediaDeviceDescription(new MediaDeviceDescription(MediaType.PRINT));
            WriterProperties writerProps = new WriterProperties();

            if (Options != null)
            {
                foreach (var option in Options)
                {
                    switch (option.Key)
                    {
                        case "baseUri":
                            converterProps.SetBaseUri(option.Value);
                            break;
                        case "createAcroForm":
                            converterProps.SetCreateAcroForm(Boolean.Parse(option.Value));
                            break;
                        case "compressLevel":
                            writerProps.SetCompressionLevel(int.Parse(option.Value));
                            break;
                        case "compressFullPdf":
                            writerProps.SetFullCompressionMode(Boolean.Parse(option.Value));
                            break;
                        case "marginTop":
                            marginTop = float.Parse(option.Value);
                            break;
                        case "marginRight":
                            marginRight = float.Parse(option.Value);
                            break;
                        case "marginBottom":
                            marginBottom = float.Parse(option.Value);
                            break;
                        case "marginLeft":
                            marginLeft = float.Parse(option.Value);
                            break;
                    }
                }
            }

            Body.Seek(0, SeekOrigin.Begin);
            PdfWriter writer = new PdfWriter(pdfStream, writerProps);
            PdfDocument pdf = new PdfDocument(writer);

            HtmlConverter.ConvertToPdf(Body, pdf, converterProps);

            pdf.Close();

            return pdfStream;
        }

您可以在以下链接中看到结果：https://rapidshare.io/2gFK/footer.png

我能让你的大脑帮我吗？

祝好


共1个答案

匿名用户

要确保您的页脚元素在所有页面上都可见，只需将其添加为中的第一个元素

页脚元素不完全适合，因为它使用默认页面边距，并且该元素需要更大的高度。由于pdfHTML不会自动计算必要的边距（另一个iText产品iText DITO会这样做），因此您需要使用marder-downCSS属性手动指定它们。

修复了工作良好的超文本标记语言：

<!DOCTYPE html>
<html>
<head>
  <style>
    #footer {
      position: running(footer);
    }

    @page {
      @bottom-left {
        content: "Page " counter(page) " of " counter(pages);
      }
      @bottom-center {
        content: element(footer);
      }
      @bottom-right {
        content: "Page " counter(page) " of " counter(pages);
      }
      margin-bottom: 80pt;
    }
  </style>
</head>
<body>
<div id="footer">
  <table style="width: 100%; font-size: 12px; line-height: 1;">
    <tbody>
    <tr>
      <td style="text-align: right; width: 50%; padding: 0;">ACME Inc.</td>
      <td style="width: 5px; padding: 0;">&nbsp;</td>
      <td style="padding: 0;">&nbsp;</td>
    </tr>
    <tr>
      <td style="text-align: right; padding: 0;">CIF: 12345678Z</td>
      <td style="width: 5px; padding: 0;">&nbsp;</td>
      <td style="padding: 0;">https://acme.inc</td>
    </tr>
    <tr>
      <td style="text-align: right; padding: 0;">C/Rue del Percebe, 13</td>
      <td style="width: 5px; padding: 0;">&nbsp;</td>
      <td style="padding: 0;">Tel.: +44 555 123 123</td>
    </tr>
    <tr>
      <td style="text-align: right; padding: 0;">45321 Virginia</td>
      <td style="width: 5px; padding: 0;">&nbsp;</td>
      <td style="padding: 0;">Fax: +44 555 321 321</td>
    </tr>
    <tr>
      <td style="text-align: right; padding: 0;">Virginia - USA</td>
      <td style="width: 5px; padding: 0;">&nbsp;</td>
      <td style="padding: 0;">info@acme.inc</td>
    </tr>
    </tbody>
  </table>
</div>
<div style="width: 100%; border: 1px dashed black;">
  <p><img src="data:image/jpg;base64, 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"/>
  <div style="background-color: yellow; width: 100%; height: 1200px">&nbsp</div>
  <p><img src="data:image/jpg;base64, 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"/></p>
</div>
</body>
</html>

视觉结果：

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