| Rotation Property | ||||||||||
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Notes
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The number of degrees clockwise to rotate the page before display. The values 0 and 180 indicate portrait orientation. The values 90 and 270 indicate landscape orientation. This value should be a multiple of 90.
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Example
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This example shows how to use the Rotation property to determine how to add a PDF page - which may be rotated - to a portrait PDF page.
using var doc = new Doc();
using var src = new Doc();
src.Read("landscape.pdf");
int rotation = ((Page)src.ObjectSoup[src.Page]).Rotation;
bool landscape = src.MediaBox.Width > src.MediaBox.Height;
doc.Page = doc.AddPage(); // output is always in portrait
if (landscape) {
switch (rotation) {
case 0:
case 90:
doc.Transform.Rotate(270, 0, 0);
doc.Transform.Translate(0, doc.MediaBox.Height);
break;
case 180:
case 270:
doc.Transform.Rotate(90, 0, 0);
doc.Transform.Translate(doc.MediaBox.Width, 0);
break;
}
doc.Rect.SetRect(0, 0, doc.MediaBox.Height, doc.MediaBox.Width);
}
else {
switch (rotation) {
case 90:
case 180:
doc.Transform.Rotate(180, 0, 0);
doc.Transform.Translate(doc.MediaBox.Width, doc.MediaBox.Height);
break;
}
}
doc.AddImageDoc(src, 1, null);
doc.Save("addtoportrait.pdf");
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