如何在pdf文档的所有页面上插入背景图像? [英] How do I insert a background image on all pages of a pdf-document?
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问题描述
我需要C#中的示例代码才能在完成的pdf文档的所有页面上插入背景图像。我正在使用iTextSharp库。
I need sample code in C# to insert the background image on all pages of the finished pdf-document. I'm using iTextSharp library.
推荐答案
你可以试试这个;
void makePDF()
{
Response.ContentType = "application/pdf";
Response.AddHeader("content-disposition", "attachment;filename=test.pdf");
Response.Cache.SetCacheability(HttpCacheability.NoCache);
string imageFilePath = Server.MapPath(".") + "/images/test.jpg";
iTextSharp.text.Image jpg = iTextSharp.text.Image.GetInstance(imageFilePath);
// Page site and margin left, right, top, bottom is defined
Document pdfDoc = new Document(PageSize.A4, 10f, 10f, 10f, 0f);
//Resize image depend upon your need
//For give the size to image
jpg.ScaleToFit(3000, 770);
//If you want to choose image as background then,
jpg.Alignment = iTextSharp.text.Image.UNDERLYING;
//If you want to give absolute/specified fix position to image.
jpg.SetAbsolutePosition(7, 69);
PdfWriter.GetInstance(pdfDoc, Response.OutputStream);
pdfDoc.Open();
pdfDoc.NewPage();
Paragraph paragraph = new Paragraph("this is the testing text for demonstrate the image is in background \n\n\n this is the testing text for demonstrate the image is in background");
pdfDoc.Add(jpg);
pdfDoc.Add(paragraph);
pdfDoc.Close();
Response.Write(pdfDoc);
Response.End();
}
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