使用 iTextSharp 将不同大小的页面添加到 PDF

Question

I have a table and a chart to be added to a PDF Document. I have used the iTextSharpLibrary to add the contents to the PDF file.

Actually the problem is that the chart has a width of 1500px and the table fits in comfortably in an A4 page size.

Actually the chart image that I get must not be scaled to fit in the page as it reduces the viewability. Hence, I need to add a new page that has a wider width than the other ones or at least change the page orientation to landscape and then add the image. How do I do this?

This is the code that I used to add a new page and then resize the page and then add the image. This is not working. Any fixes?

var imageBytes = ImageGenerator.GetimageBytes(ImageSourceId);
var myImage = iTextSharp.text.Image.GetInstance(imageBytes);

document.NewPage();

document.SetPageSize(new Rectangle(myImage.Width, myImage.Height));

myImage.ScaleToFit(document.PageSize.Width, document.PageSize.Height);
document.Add(myImage);

Answer 1

I fixed the Issue. I have to set the page size before calling the GetInstance of the Pdfdocument. Then, i can give different pagesizes for each page

Answer 2

I'm not sure what you mean by before calling the GetInstance of the Pdfdocument , but setting the pageSize right before calling newPage works. Here follows the c# code to create a new pdf that's made of two pictures, no matter how wild their sizes difference is. The important lines here are the new Document and SetPageSize ones.

static public void MakePdfFrom2Pictures (String pic1InPath, String pic2InPath, String pdfOutPath)
{
    using (FileStream pic1In = new FileStream (pic1InPath, FileMode.Open))
    using (FileStream pic2In = new FileStream (pic2InPath, FileMode.Open))
    using (FileStream pdfOut = new FileStream (pdfOutPath, FileMode.Create))
    {
        //Load first picture
        Image image1 = Image.GetInstance (pic1In);
        //I set the position in the image, not during the AddImage call
        image1.SetAbsolutePosition (0, 0);
        //Load second picture
        Image image2 = Image.GetInstance (pic2In);
        // ...
        image2.SetAbsolutePosition (0, 0);
        //Create a document whose first page has image1's size.
        //Image IS a Rectangle, no need for new Rectangle (Image.Width, Image.Height).
        Document document = new Document (image1);
        //Assign writer
        PdfWriter writer = PdfWriter.GetInstance (document, pdfOut);
        //Allow writing
        document.Open ();
        //Get writing head
        PdfContentByte pdfcb = writer.DirectContent;
        //Put the first image on the first page
        pdfcb.AddImage (image1);
        //The new page will have image2's size
        document.SetPageSize (image2);
        //Add the new second page, and start writing in it
        document.NewPage ();
        //Put the second image on the second page
        pdfcb.AddImage (image2);
        //Finish the writing
        document.Close ();
    }
}