Base64画像ヘッダーとフッターでファイルサイズを削減する

using IronPdf;

var pdf = PdfDocument.FromFile("input.pdf");

// Static layer: holds the Base64 image. The page-number cell is left empty.
string staticFooter = @"
<table style='width:100%; table-layout:fixed;'>
  <tr>
    <td style='width:20%;'>
      <img src='data:image/png;base64,iVBORw0KGg...' style='width:150px;' />
    </td>
    <td style='width:80%; text-align:right;'></td>
  </tr>
</table>";

// Dynamic layer: holds only {page}. Same layout, but no image.
string dynamicFooter = $@"
<table style='width:100%; table-layout:fixed;'>
  <tr>
    <td style='width:20%;'></td>
    <td style='width:80%; text-align:right; font-size:10px;'>Page {{page}} of {pdf.PageCount}</td>
  </tr>
</table>";

// Pass 1: add the static image footer (image embedded once).
pdf.AddHtmlHeadersAndFooters(new ChromePdfRenderOptions
{
    HtmlFooter = new HtmlHeaderFooter { HtmlFragment = staticFooter, MaxHeight = 40 }
});

// Pass 2: add the dynamic page-number footer (no image, stays small).
pdf.AddHtmlHeadersAndFooters(new ChromePdfRenderOptions
{
    HtmlFooter = new HtmlHeaderFooter { HtmlFragment = dynamicFooter, MaxHeight = 40 }
});

pdf.SaveAs("output.pdf");

Imports IronPdf

Dim pdf = PdfDocument.FromFile("input.pdf")

' Static layer: holds the Base64 image. The page-number cell is left empty.
Dim staticFooter As String = "
<table style='width:100%; table-layout:fixed;'>
  <tr>
    <td style='width:20%;'>
      <img src='data:image/png;base64,iVBORw0KGg...' style='width:150px;' />
    </td>
    <td style='width:80%; text-align:right;'></td>
  </tr>
</table>"

' Dynamic layer: holds only {page}. Same layout, but no image.
Dim dynamicFooter As String = $"
<table style='width:100%; table-layout:fixed;'>
  <tr>
    <td style='width:20%;'></td>
    <td style='width:80%; text-align:right; font-size:10px;'>Page {{page}} of {pdf.PageCount}</td>
  </tr>
</table>"

' Pass 1: add the static image footer (image embedded once).
pdf.AddHtmlHeadersAndFooters(New ChromePdfRenderOptions With {
    .HtmlFooter = New HtmlHeaderFooter With {.HtmlFragment = staticFooter, .MaxHeight = 40}
})

' Pass 2: add the dynamic page-number footer (no image, stays small).
pdf.AddHtmlHeadersAndFooters(New ChromePdfRenderOptions With {
    .HtmlFooter = New HtmlHeaderFooter With {.HtmlFragment = dynamicFooter, .MaxHeight = 40}
})

pdf.SaveAs("output.pdf")