iTextSharp页脚背景颜色

Document document = new Document();

PdfWriter writer = PdfWriter.GetInstance(document, new FileStream("output.pdf", FileMode.Create));

document.Open();

public class CustomFooter : PdfPageEventHelper
{
    public override void OnEndPage(PdfWriter writer, Document document)
    {
        // 设置页脚背景颜色
        PdfContentByte content = writer.DirectContent;
        content.SetRGBColorFill(255, 0, 0); // 设置为红色背景
        content.Rectangle(document.Left, document.Bottom, document.PageSize.Width, 50); // 设置背景矩形的位置和大小
        content.Fill();
        
        // 添加页脚文本
        Phrase footerText = new Phrase("页脚内容", new Font(Font.FontFamily.HELVETICA, 10, Font.NORMAL));
        ColumnText.ShowTextAligned(content, Element.ALIGN_CENTER, footerText, document.PageSize.Width / 2, document.Bottom + 20, 0);
    }
}

writer.PageEvent = new CustomFooter();

document.Add(new Paragraph("这是一个示例文档"));

document.Close();