add a pdf layer to existing pdf document

[spirepap]

I am getting 'out of memory' exception at

Code: Select all

PdfImage pdfI = PdfImage.FromFile("layer.pdf");

could you help me resolve this.

[Betsy]

Dear spirepap,

Sorry that there is no way to add a layer using .pdf file. We suggest you save the PDF file as image and then create a layer with the image. Here is sample code to add a layer with image for your reference.

Code: Select all

            PdfDocument ImageDoc = new PdfDocument("Imatemp.pdf");
            //save the first page as image
            Image img = ImageDoc.SaveAsImage(0);

            PdfDocument pdfdoc = new PdfDocument("sample.pdf");
            //get the page for adding layer
            PdfPageBase page = pdfdoc.Pages[0];
            //add a layer named layer1
            PdfPageLayer layer = page.PageLayers.Add("layer1");
            //load the image used to add in the layer
            PdfImage pdfI = PdfImage.FromImage(img);
            //draw the image on the layer
            layer.Graphics.DrawImage(pdfI, new PointF(0, 0));           
            pdfdoc.SaveToFile("8303.pdf",FileFormat.PDF);

Hope this can help you. If there is any question, please let me know.

Sincerely,
Betsy
E-iceblue support team

[spirepap]

If I convert that into image and add then it, layer is loosing its properties.

[Betsy]

Dear spirepap,

Thanks for your reply.
Could you please provide us your sample document and the target result PDF( you can create it by Adobe) and the codes you were using ? So we will test it at our end and will provide you more information accordingly.

Thanks,
Betsy
E-iceblue support team

[spirepap]

Worked fine, thanks.

[Betsy]

Dear spirepap,

Thanks for your feedback.
Welcome to write to us again for further question. We are here for help.

Sincerely,
Betsy
E-iceblue support team

[spirepap]

Is it possible to add a vector file as a layer?

[Betsy]

Dear spirepap,

Thanks for your inquiry.
Sorry that Spire.PDF doesn't support to add .svg file as a layer to pdf document directly. But there is a way maybe meets your requirement, convert .svg file as image(e.g. png) using other tool, and then create a layer with the image.

Sincerely,
Betsy
E-iceblue support team