RotatePages Method (GdPicturePDF)
In This Topic
Rotates clockwise all pages of the currently loaded PDF document. The rotation angle can be set to 90, 180 or 270 degrees.
Syntax
Parameters
- Rotation
- The rotation angle, in degrees, determining the clockwise rotation. This parameter can be set to 90, -90, 180, -180, 270, -270 or any multiple of 90.
Return Value
A member of the GdPictureStatus enumeration. If the method has been successfully followed, then the return value is GdPictureStatus.OK.
We strongly recommend always checking this status first.
Example
How to rotate all pages of the PDF document by 90 degrees.
Dim gdpicturePDF As New GdPicturePDF()
If gdpicturePDF.LoadFromFile("test.pdf", False) = GdPictureStatus.OK Then
Dim status As GdPictureStatus = gdpicturePDF.RotatePages(90)
If status = GdPictureStatus.OK Then
Dim message As String = "The pages have been rotated successfully"
If gdpicturePDF.SaveToFile("test_RotatePages.pdf") = GdPictureStatus.OK Then
message = message + " and the file has been saved."
Else
message = message + ", but the file can't be saved."
End If
MessageBox.Show(message, "Example: RotatePages")
Else
MessageBox.Show("The RotatePages() method has failed with the status: " + status.ToString(), "Example: RotatePages")
End If
Else
MessageBox.Show("The file can't be loaded.", "Example: RotatePages")
End If
gdpicturePDF.Dispose()
GdPicturePDF gdpicturePDF = new GdPicturePDF();
if (gdpicturePDF.LoadFromFile("test.pdf", false) == GdPictureStatus.OK)
{
GdPictureStatus status = gdpicturePDF.RotatePages(90);
if (status == GdPictureStatus.OK)
{
string message = "The pages have been rotated successfully";
if (gdpicturePDF.SaveToFile("test_RotatePages.pdf") == GdPictureStatus.OK)
message = message + " and the file has been saved.";
else
message = message + ", but the file can't be saved.";
MessageBox.Show(message, "Example: RotatePages");
}
else
MessageBox.Show("The RotatePages() method has failed with the status: " + status.ToString(), "Example: RotatePages");
}
else
MessageBox.Show("The file can't be loaded.", "Example: RotatePages");
gdpicturePDF.Dispose();
Example
How to rotate all pages of the PDF document by 90 degrees.
Dim gdpicturePDF As New GdPicturePDF()
If gdpicturePDF.LoadFromFile("test.pdf", False) = GdPictureStatus.OK Then
Dim status As GdPictureStatus = gdpicturePDF.RotatePages(90)
If status = GdPictureStatus.OK Then
Dim message As String = "The pages have been rotated successfully"
If gdpicturePDF.SaveToFile("test_RotatePages.pdf") = GdPictureStatus.OK Then
message = message + " and the file has been saved."
Else
message = message + ", but the file can't be saved."
End If
MessageBox.Show(message, "Example: RotatePages")
Else
MessageBox.Show("The RotatePages() method has failed with the status: " + status.ToString(), "Example: RotatePages")
End If
Else
MessageBox.Show("The file can't be loaded.", "Example: RotatePages")
End If
gdpicturePDF.Dispose()
GdPicturePDF gdpicturePDF = new GdPicturePDF();
if (gdpicturePDF.LoadFromFile("test.pdf", false) == GdPictureStatus.OK)
{
GdPictureStatus status = gdpicturePDF.RotatePages(90);
if (status == GdPictureStatus.OK)
{
string message = "The pages have been rotated successfully";
if (gdpicturePDF.SaveToFile("test_RotatePages.pdf") == GdPictureStatus.OK)
message = message + " and the file has been saved.";
else
message = message + ", but the file can't be saved.";
MessageBox.Show(message, "Example: RotatePages");
}
else
MessageBox.Show("The RotatePages() method has failed with the status: " + status.ToString(), "Example: RotatePages");
}
else
MessageBox.Show("The file can't be loaded.", "Example: RotatePages");
gdpicturePDF.Dispose();
See Also