Draw with Graphics State in PDF - VB.NET
PDF SDK sample in VB.NET demonstrating ‘Draw with Graphics State in PDF’
Program.vb
Imports Bytescout.PDF
''' <summary>
''' This example demonstrates how to save and restore the graphics state.
''' </summary>
Class Program
Shared Sub Main()
' Create new document
Dim pdfDocument = New Document()
pdfDocument.RegistrationName = "demo"
pdfDocument.RegistrationKey = "demo"
' If you wish to load an existing document uncomment the line below And comment the Add page section instead
' pdfDocument.Load(".\existing_document.pdf")
' Add page
Dim page = New Page(PaperFormat.A4)
pdfDocument.Pages.Add(page)
Dim canvas = page.Canvas
' Keep current graphics state
canvas.SaveGraphicsState()
' Transform coordinates and draw rectangle
canvas.TranslateTransform(200, 200)
canvas.RotateTransform(45)
canvas.DrawRectangle(New SolidBrush(New ColorRGB(0, 0, 255)), 0, 0, 100, 100)
' Restore the state and draw the same rectangle
canvas.RestoreGraphicsState()
canvas.DrawRectangle(New SolidBrush(New ColorRGB(255, 0, 0)), 200, 200, 100, 100)
' Save document to file
pdfDocument.Save("result.pdf")
' Cleanup
pdfDocument.Dispose()
' Open document in default PDF viewer app
Process.Start("result.pdf")
End Sub
End Class
Resources.Designer.vb
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