Rotate All Pages

[ssaunders]

Hi,

Can anyone please explain how I can load a PDF or multi-page TIFF file in the GdViewer and then rotate all pages 90 degrees? I can make it loop through the pages and perform the rotation. But when it's done, only the first page is still rotated. When I scroll through the document, all pages are back in the original orientation. This function used to be easy in the Active-X version of GdPicture.

Any ideas or sample VB.Net code? Thanks!


Scott

[Loïc]

Hello,

That's pretty easy.

For PDF:

Code: Select all

        Dim gdpicturePDF As New GdPicturePDF()
        If gdpicturePDF.LoadFromFile("c:\test.pdf", False) = GdPictureStatus.OK Then
            gdpicturePDF.RotatePages(90)
            GdViewer1.DisplayFromGdPicturePDF(gdpicturePDF)
        End If

For tiff:

Code: Select all

        Dim gdpictureImaging As New GdPictureImaging
        Dim ImageID As Integer = gdpictureImaging.CreateGdPictureImageFromFile("c:\test.tif")
        If ImageID <> 0 Then
            For i As Integer = 1 To gdpictureImaging.TiffGetPageCount(ImageID)
                gdpictureImaging.TiffSelectPage(ImageID, i)
                gdpictureImaging.Rotate(ImageID, RotateFlipType.Rotate90FlipNone)
            Next
            gdpictureImaging.TiffSelectPage(ImageID, 1)
            GdViewer1.DisplayFromGdPictureImage(ImageID)
        End If

Let me know if you need further information.

Kind regards,

Loïc