我正在尝试使用库 ITextSharp 创建一个简单的 .pdf。我正在制作一个 .pdf,其中页眉和页脚中有图像,页眉边距为 300px,页脚边距为 664px。
我的问题:我的代码由于某种原因没有插入页眉图像,而页脚图像由于某种原因放大/放大。
你能告诉我我的代码有什么问题吗?标题图像应该扩展 A4 页面的整个宽度并且高度为 300 像素。页脚图像应扩展页面的整个宽度,高度为 664 像素。两张图片都不需要调整大小,它们已经是页面的整个宽度和正确的高度。
public class itsEventsHandler : PdfPageEventHelper
{
PdfTemplate total;
BaseFont helv;
// I am following a tutorial & they said that if I want to create headers/footers when each page is created
// that I should override the OnEndPage() not the OnStartPage() is that correct?
public override void OnEndPage(PdfWriter writer, Document document)
{
// Post: When each new page is created, add a header & footer image to the page. And set the top margin to 370px
// and the bottom margin to 664px.
// Result: The function executes but the pdf's header image isn't visible & the footer looks resized(scaled up in size).
//Footer Image
iTextSharp.text.Image imgfoot = iTextSharp.text.Image.GetInstance(resolvePath("~/images/pdf/bottomBorder.jpg"));
//Header Image
iTextSharp.text.Image imghead = iTextSharp.text.Image.GetInstance(resolvePath("~/images/pdf/topBorder.jpg"));
imgfoot.SetAbsolutePosition(0, 0);
imghead.SetAbsolutePosition(0, 0);
PdfContentByte cbhead = writer.DirectContent;
PdfTemplate tp = cbhead.CreateTemplate(2480, 370); // units are in pixels but I'm not sure if thats the correct units
tp.AddImage(imghead);
PdfContentByte cbfoot = writer.DirectContent;
PdfTemplate tpl = cbfoot.CreateTemplate(2480, 664);
tpl.AddImage(imgfoot);
cbhead.AddTemplate(tp, 0, 0);
cbfoot.AddTemplate(tpl, 0, 0);
helv = BaseFont.CreateFont(BaseFont.HELVETICA, BaseFont.WINANSI, BaseFont.NOT_EMBEDDED);
/*PdfContentByte cb = writer.DirectContent;
cbfoot.SaveState();
document.SetMargins(35, 35, 100, 82);
cb.RestoreState();*/
//document.NewPage();
base.OnStartPage(writer, document);
}
public override void OnOpenDocument(PdfWriter writer, Document document)
{
total = writer.DirectContent.CreateTemplate(100, 100);
total.BoundingBox = new iTextSharp.text.Rectangle(-20, -20, 100, 100);
helv = BaseFont.CreateFont(BaseFont.HELVETICA, BaseFont.WINANSI, BaseFont.NOT_EMBEDDED);
}
}
// My code to create the pdf
// Create a Document object
var document = new Document(PageSize.A4, 50, 50, 370, 664);
var output = new MemoryStream();
var writer = PdfWriter.GetInstance(document, output);
writer.PageEvent = new itsEventsHandler();
// Open the Document for writing
document.Open();
// add some paragrahs
document.Close();
最佳答案
添加模板时检查它们的位置。例如:
cbhead.AddTemplate(tp, 0, 715);
cbfoot.AddTemplate(tpl, 0, 0);
希望这对您有所帮助!
关于c# - 将页眉和页脚图像添加到 PDF : Header image doesn't show, 页脚被放大,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/9595859/