Working with rotated pages/PDFs

[Cheech Marin]

Hi,

Are there any examples available of working with rotated PDFs? I'm trying to consistently find the top of a page to add a header but the coordinates seem to rotate and shift from page to page.

See attached for an example of rotated PDFs. I used PdfPage.Graphics to draw all text.

Attachment: out_sync_31504223.zip

[Praveenkumar H]

Hi Cheech 

The Syncfusin PDF library Graphics always draw the element from top left corner (0,0) for every rotation, this is the actual behavior of our library, you can rotate the coordinates based on the page rotation, please refer the below code snippet. 

PdfLoadedDocument documet = new PdfLoadedDocument(File.Open("../../../rotated.pdf", FileMode.Open)); 

            //Creating header template 

            PdfTemplate template = new PdfTemplate(new RectangleF(0, 0, 200, 200)); 

            template.Graphics.DrawRectangle(PdfBrushes.Red, new RectangleF(0, 0, 200, 200)); 

            template.Graphics.DrawString("Hello world", new PdfStandardFont(PdfFontFamily.Helvetica, 20), PdfBrushes.White, 0, 0); 

             

            foreach (PdfLoadedPage lPage in documet.Pages) 

            { 

                //page size is same for all the page 595(Width) X 842(width) 

                PdfPageRotateAngle angle = lPage.Rotation; 

                PdfGraphics graphics = lPage.Graphics; 

                float x = 0, y = 0; 

               

                graphics.Save(); 

                //Change the coordination of the page based on the rotation angle 

                if (angle == PdfPageRotateAngle.RotateAngle90) 

                { 

                    graphics.TranslateTransform(lPage.Size.Height, 0); 

                    graphics.RotateTransform(90); 

                } 

                if(angle==PdfPageRotateAngle.RotateAngle180) 

                { 

                    graphics.TranslateTransform(lPage.Size.Width, lPage.Size.Height); 

                    graphics.RotateTransform(180); 

                } 

                if(angle==PdfPageRotateAngle.RotateAngle270) 

                { 

                    graphics.TranslateTransform(0,lPage.Size.Width); 

                    graphics.RotateTransform(-90); 

                } 

              

                //Drawing the template 

                graphics.DrawPdfTemplate(template, new PointF(x,y)); 

                graphics.Restore(); 

            } 

            using (var memoryStream = File.Open("sample2.pdf", FileMode.OpenOrCreate)) 

            { 

                documet.Save(memoryStream); 

                documet.Close(true); 

            } 

Please try this sample and let us you know your result. 

Regards, 

Praveen 

[David]

How do u used 

PdfDocument to roate left or right I am using 

 doc.PageSettings.Rotate = angle; to rotate it but dont see an option for l

[Gowthamraj Kumar]

Hi David, 

 

We have create a sample to rotate a pdf document using rotate property in our pdf document instance. We have attached the sample and output document for your reference, please try the below sample on your end and let us know the result.

Sample: https://www.syncfusion.com/downloads/support/directtrac/general/ze/1647701544681977 

 

Please refer to the below link for more information, 

UG: https://help.syncfusion.com/file-formats/pdf/working-with-pages#rotating-a-pdf-page 

KB: https://www.syncfusion.com/kb/9154/how-to-rotate-pages-in-a-pdf-file 

 

Please let us know if you need any further assistance in this. 

 

Regards, 

Gowthamraj K