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Show Or Hide Text Or Vector Or Image Layers In PDF - VB.NET

PDF Renderer SDK sample in VB.NET demonstrating ‘Show Or Hide Text Or Vector Or Image Layers In PDF’

Program.vb

Imports Bytescout.PDFRenderer


Class Program
    Friend Shared Sub Main(args As String())

        ' Create an instance of Bytescout.PDFRenderer.RasterRenderer object and register it.
        Dim renderer As New RasterRenderer()
        renderer.RegistrationName = "demo"
        renderer.RegistrationKey = "demo"

        Dim renderingOptions As New RenderingOptions()

        ' Enable text objects rendering
        renderingOptions.RenderTextObjects = True
        ' DISABLE vector objects rendering
        renderingOptions.RenderVectorObjects = False
        ' DISABLE image objects rendering
        renderingOptions.RenderImageObjects = False
        
        ' Load PDF document.
        renderer.LoadDocumentFromFile("multipage.pdf")

        For i As Integer = 0 To renderer.GetPageCount() - 1
            ' Render document page to PNG image file
            renderer.Save("image" & i & ".png", RasterImageFormat.PNG, i, 300, renderingOptions)
        Next

        ' Cleanup
        renderer.Dispose()

        ' Open the first output file in default image viewer.
        System.Diagnostics.Process.Start("image0.png")
    End Sub
End Class

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