Create PDF file from scratch using Spire.PDF

PDF is a popular means of sharing documents, especially for those formatted for print. Not coincidentally, PDF files -when prepared properly - also provide an excellent archival file format. Many books and other reading material are stored in the form of PDF. So there is a need that we can somehow create a PDF document from scratch. And in this document, I will introduce you how to do so. All you need is a free API from here (https://freepdf.codeplex.com/). Text, picture and barcode can be added into the PDF document using this API.

Previewscreenshot of the result PDF file.

Here is the code to create the above PDF file. Just use the API and test the following code, PDF file will be successfully created. And I hope this article can do you some help.

//create a pdf document.

PdfDocument doc = newPdfDocument();

// create one page

PdfPageBase page = doc.Pages.Add();

floatpageWidth = page.Canvas.ClientSize.Width;

float y = 0;

//page header

PdfPen pen1 = newPdfPen(Color.LightGray, 1f);

PdfBrush brush1 = newPdfSolidBrush(Color.LightGray);

PdfTrueTypeFont font1 = newPdfTrueTypeFont(newFont("Arial", 8f, FontStyle.Italic));

PdfStringFormat format1 = newPdfStringFormat(PdfTextAlignment.Right);

String text = "Demo of Barcode";

page.Canvas.DrawString(text, font1, brush1, pageWidth, y, format1);

SizeF size = font1.MeasureString(text, format1);

y = y + size.Height + 1;

page.Canvas.DrawLine(pen1, 0, y, pageWidth, y);

//title

y = y + 5;

PdfBrush brush2 = newPdfSolidBrush(Color.Black);

PdfTrueTypeFont font2 = newPdfTrueTypeFont(newFont("Arial", 16f, FontStyle.Bold));

PdfStringFormat format2 = newPdfStringFormat(PdfTextAlignment.Center);

format2.CharacterSpacing = 1f;

text = "Summary of Science";

page.Canvas.DrawString(text, font2, brush2, pageWidth / 2, y, format2);

size = font2.MeasureString(text, format2);

y = y + size.Height + 6;

//add barcode

PdfCode128BBarcode barcode = newPdfCode128BBarcode("Hello 00-123");

barcode.BarHeight = 20;

barcode.BarcodeToTextGapHeight = 1f;

barcode.TextDisplayLocation = TextLocation.Bottom;

barcode.TextColor = Color.Blue;

barcode.Draw(page, newPointF(0, y));

y = y + 30;

//add picture

PdfImage image = PdfImage.FromFile("Science.png");

page.Canvas.DrawImage(image, newPointF(pageWidth - image.PhysicalDimension.Width, y));

floatimageLeftSpace = pageWidth - image.PhysicalDimension.Width - 2;

floatimageBottom = image.PhysicalDimension.Height + y;

//add text content

PdfStringFormat format4 = newPdfStringFormat();

text = System.IO.File.ReadAllText("ScienceText.txt");

PdfTrueTypeFont font5 = newPdfTrueTypeFont(newFont("Arial", 10f));

format4.LineSpacing = font5.Size * 1.5f;

PdfStringLayoutertextLayouter = newPdfStringLayouter();

floatimageLeftBlockHeight = imageBottom - y;

PdfStringLayoutResult result

    = textLayouter.Layout(text, font5, format4, newSizeF(imageLeftSpace, imageLeftBlockHeight));

if (result.ActualSize.Height<imageBottom - y)

{

imageLeftBlockHeight = imageLeftBlockHeight + result.LineHeight;

result = textLayouter.Layout(text, font5, format4, newSizeF(imageLeftSpace, imageLeftBlockHeight));

}

foreach (LineInfo line inresult.Lines)

{

page.Canvas.DrawString(line.Text, font5, brush2, 0, y, format4);

    y = y + result.LineHeight;

}

PdfTextWidgettextWidget = newPdfTextWidget(result.Remainder, font5, brush2);

PdfTextLayouttextLayout = newPdfTextLayout();

textLayout.Break = PdfLayoutBreakType.FitPage;

textLayout.Layout = PdfLayoutType.Paginate;

RectangleF bounds = newRectangleF(newPointF(0, y), page.Canvas.ClientSize);

textWidget.StringFormat = format4;

textWidget.Draw(page, bounds, textLayout);

//save pdf file.

doc.SaveToFile("result.pdf");

doc.Close();

//view the result file

System.Diagnostics.Process.Start("result.pdf");