Rotating a PDF page on Server/Desktop

Requirements

Packages are required for production license. Trial keys have unlimited access to all features.

Demo showcases functionality using WebViewer UI.

To rotate a page in a PDF document.

PDFDoc doc = new PDFDoc(filename);

// Rotate the first page 90 degrees clockwise.
Page page = doc.GetPage(1);
Page.Rotate originalRotation = page.GetRotation();
Page.Rotate rotation;
switch (originalRotation)
{
  case Page.Rotate.e_0:   rotation = Page.Rotate.e_90;  break;
  case Page.Rotate.e_90:  rotation = Page.Rotate.e_180; break;
  case Page.Rotate.e_180: rotation = Page.Rotate.e_270; break;
  case Page.Rotate.e_270: rotation = Page.Rotate.e_0;   break;
  default:                rotation = Page.Rotate.e_0;   break;
}
page.SetRotation(rotation);

PDFDoc doc(filename);

// Rotate the first page 90 degrees clockwise.
Page page = doc.GetPage(1);
Page::Rotate originalRotation = page.GetRotation();
Page::Rotate rotation;
switch (originalRotation)
{
  case Page::e_0:   rotation = Page::e_90;  break;
  case Page::e_90:  rotation = Page::e_180; break;
  case Page::e_180: rotation = Page::e_270; break;
  case Page::e_270: rotation = Page::e_0;   break;
  default:          rotation = Page::e_0;   break;
}
page.SetRotation(rotation);

doc := NewPDFDoc(filename)

// Rotate the first page 90 degrees clockwise.
page := doc.GetPage(1)
originalRotation := page.GetRotation()
var rotation int
if originalRotation == PageE_0 {
  rotation = PageE_90
}
else if originalRotation == PageE_90 {
  rotation = PageE_180
}
else if originalRotation == PageE_180 {
  rotation = PageE_270
}
else if originalRotation == PageE_270 {
  rotation = PageE_0
}
else {
  rotation = Page::E_0
}
page.SetRotation(rotation)

PDFDoc doc = new PDFDoc(filename);

// Rotate the first page 90 degrees clockwise.
Page page = doc.getPage(1);
int originalRotation = page.getRotation();
int rotation;
switch (originalRotation)
{
  case Page.e_0:   rotation = Page.e_90;  break;
  case Page.e_90:  rotation = Page.e_180; break;
  case Page.e_180: rotation = Page.e_270; break;
  case Page.e_270: rotation = Page.e_0;   break;
  default:         rotation = Page.e_0;   break;
}
page.setRotation(rotation);

async function main() {
  const doc = await PDFNet.PDFDoc.createFromURL(filename);

  // Rotate the first page 90 degrees clockwise.
  const page = await doc.getPage(1);
  const originalRotation = await page.getRotation();
  var rotation;
  switch (originalRotation)
  {
    case Page.e_0:   rotation = Page.e_90;  break;
    case Page.e_90:  rotation = Page.e_180; break;
    case Page.e_180: rotation = Page.e_270; break;
    case Page.e_270: rotation = Page.e_0;   break;
    default:         rotation = Page.e_0;   break;
  }
  page.setRotation(rotation);
}
PDFNet.runWithCleanup(main);

val doc = PDFDoc(filename)

// Rotate the first page 90 degrees clockwise.
val page = doc.getPage(1)
val originalRotation = page.getRotation()
val rotation = when (originalRotation)
{
  Page.e_0    -> Page.e_90
  Page.e_90   -> Page.e_180
  Page.e_180  -> Page.e_270
  Page.e_270  -> Page.e_0
  else        -> Page.e_0
}
page.setRotation(rotation)

PTPDFDoc *doc = [[PTPDFDoc alloc] initWithFilepath: filename];

// Rotate the first page 90 degrees clockwise.
PTPage *page = [doc GetPage:1];
PTRotate originalRotation = [page getRotation];
PTRotate rotation;
switch (originalRotation)
{
  case e_pt0:   rotation = e_pt90;  break;
  case e_pt90:  rotation = e_pt180; break;
  case e_pt180: rotation = e_pt270; break;
  case e_pt270: rotation = e_pt0;   break;
  default:      rotation = e_pt0;   break;
}
[page SetRotation: rotation];

let doc: PTPDFDoc = PTPDFDoc(filepath: filename)

// Rotate the first page 90 degrees clockwise.
let page: PTPage = doc.getPage(1)
let originalRotation: PTRotate = page.getRotation()
var rotation: PTRotate
switch (originalRotation)
{
  case e_pt0:   rotation = e_pt90
  case e_pt90:  rotation = e_pt180
  case e_pt180: rotation = e_pt270
  case e_pt270: rotation = e_pt0
  default:      rotation = e_pt0
}
page.setRotation(rotation)

$doc = new PDFDoc($filename);

// Rotate the first page 90 degrees clockwise.
$page = $doc->GetPage(1);
$originalRotation = $page->GetRotation();
$rotation = NULL;
switch ($originalRotation)
{
  case Page::e_0:   $rotation = Page::e_90;  break;
  case Page::e_90:  $rotation = Page::e_180; break;
  case Page::e_180: $rotation = Page::e_270; break;
  case Page::e_270: $rotation = Page::e_0;   break;
  default:          $rotation = Page.Rotate.e_0;   break;
}
$page->SetRotation($rotation);

doc = PDFDoc(filename)

# Rotate the first page 90 degrees clockwise.
page = doc.GetPage(1)
originalRotation = page.GetRotation()
rotation = None
if originalRotation == Page.e_0:
  rotation = Page.e_90
elif originalRotation == Page.e_90:
  rotation = Page.e_180
elif originalRotation == Page.e_180:
  rotation = Page.e_270
elif originalRotation == Page.e_270:
  rotation = Page.e_0
else
  rotation = Page.e_0
page.SetRotation(rotation)

doc = PDFDoc.new(filename)

# Rotate the first page 90 degrees clockwise.
page = doc.GetPage(1)
originalRotation = page.GetRotation()
rotation = nil
if originalRotation == Page::E_0
  rotation = Page::E_90
elsif originalRotation == Page::E_90
  rotation = Page::E_180
elsif originalRotation == Page::E_180
  rotation = Page::E_270
elsif originalRotation == Page::E_270
  rotation = Page::E_0
else
  rotation = Page::E_0
end
page.SetRotation(rotation)

Dim doc4 As PDFDoc = New PDFDoc(filename)

' Rotate the first page 90 degrees clockwise.
Dim page As Page = doc.GetPage(1)
Dim originalRotation As Page.Rotate = page.GetRotation()
Dim rotation As Page.Rotate
If originalRotation == Page.Rotate.e_0 Then
  rotation = Page.Rotate.e_90
ElseIf originalRotation == Page.Rotate.e_90 Then
  rotation = Page.Rotate.e_180
ElseIf originalRotation == Page.Rotate.e_180 Then
  rotation = Page.Rotate.e_270
ElseIf originalRotation == Page.Rotate.e_270 Then
  rotation = Page.Rotate.e_0
Else
  rotation = Page.Rotate.e_0
End If
page.SetRotation(rotation)

About rotating pages

A page can be rotated clockwise, by 90 degrees, when displayed or printed. The Page.GetRotation() method returns the Page.Rotate enum specifying the current rotation. Similarly, Page.SetRotation() sets the current rotation.

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