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This sample shows how to use CMYK colors.

PDF Output File

See the PDF file created by this sample: output.pdf (78 kB)

Screen Shots

Here is a sample screen shot:

PDF file with CMYK squares

Source Code

This is the source code the shows how to set the color mode to CMYK:
PdfDocument document = PdfReader.Open(filename);
document.Options.ColorMode = PdfColorMode.Cmyk;
 
// Set version to PDF 1.4 (Acrobat 5) because we use transparency.
if (document.Version < 14)
  document.Version = 14;
 
PdfPage page = document.Pages[0];
 
// Get an XGraphics object for drawing beneath the existing content
 
XGraphics gfx = XGraphics.FromPdfPage(page, XGraphicsPdfPageOptions.Append);
 
gfx.DrawRectangle(new XSolidBrush(XColor.FromCmyk(1, 0.68, 0, 0.12)), new XRect(30, 60, 50, 50));
gfx.DrawRectangle(new XSolidBrush(XColor.FromCmyk(0, 0.70, 1, 0)), new XRect(550, 60, 50, 50));
 
gfx.DrawRectangle(new XSolidBrush(XColor.FromCmyk(0, 0, 0, 0)), new XRect(90, 100, 50, 50));
gfx.DrawRectangle(new XSolidBrush(XColor.FromCmyk(0, 0, 0, 0)), new XRect(150, 100, 50, 50));
 
gfx.DrawRectangle(new XSolidBrush(XColor.FromCmyk(0.7, 0, 0.70, 1, 0)), new XRect(90, 100, 50, 50));
gfx.DrawRectangle(new XSolidBrush(XColor.FromCmyk(0.5, 0, 0.70, 1, 0)), new XRect(150, 100, 50, 50));
 
gfx.DrawRectangle(new XSolidBrush(XColor.FromCmyk(0.35, 0.15, 0, 0.08)), new XRect(50, 360, 50, 50));
gfx.DrawRectangle(new XSolidBrush(XColor.FromCmyk(0.25, 0.10, 0, 0.05)), new XRect(150, 360, 50, 50));
gfx.DrawRectangle(new XSolidBrush(XColor.FromCmyk(0.15, 0.05, 0, 0)), new XRect(250, 360, 50, 50));

Note: The samples on this site usually show and discuss code snippets only. The complete source code of the samples with solutions for Visual Studio is available from the download area on CodePlex.


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