Question

我正在使用pdf，我首先将它们合并，然后为合并的pdf的每个页面创建一个标题和页脚。我正在使用一种方法进行合并，使用另一种方法来设置页眉和页脚。

对于某些文档，页眉和页脚与内容重叠。我试图为文档设置保证金，但它不会改变任何内容。

public byte[] HeaderAndFooter(byte[] inputPdf)
{
    var dest = new MemoryStream();
    PdfDocument pdfDoc = new PdfDocument(new PdfReader(inputPdf.ToMemoryStream()),
                                         new PdfWriter(dest));
    Document doc = new Document(pdfDoc);
    doc.SetMargins(200,200, 200, 200); /* It doesn't matter the
    numbers I set in here the document remains the same...*/
    numberOfPages = pdfDoc.GetNumberOfPages();

    Paragraph header = new Paragraph("This is a header for every page...")
            .SetFont(PdfFontFactory.CreateFont(FontConstants.HELVETICA))
            .SetFontSize(10)
            .SetFontColor(Color.BLACK);

    for (int i = 1; i <= numberOfPages; i++)
    {
        var pageSize = pdfDoc.GetPage(i).GetPageSize();
        float LeftMargin = 36;
        float BottomMargin = 24;

        float y = pageSize.GetTop() - 72;
        float center = pageSize.GetWidth() / 2;
        doc.ShowTextAligned(header, LeftMargin, y, i, TextAlignment.LEFT, VerticalAlignment.BOTTOM, 0);
        doc.ShowTextAligned(footerL, LeftMargin, BottomMargin, i, TextAlignment.LEFT, VerticalAlignment.BOTTOM, 0);
        doc.ShowTextAligned(footerC, center, BottomMargin, i, TextAlignment.CENTER, VerticalAlignment.BOTTOM, 0);
    }
    doc.Close();
    return dest.ToArray();
}

如何避免页眉和页脚与内容重叠？

在pdf itext7中设置内容的保证金

0 个答案: