Add Show-Hide Widget Action in PDF - VB.NET
PDF SDK sample in VB.NET demonstrating ‘Add Show-Hide Widget Action in PDF’
Program.vb
Imports Bytescout.PDF
''' <summary>
''' This example demonstrates how to show/hide a widget in document.
''' </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)
' Create widget that will be shown/hidden
Dim editBox = New EditBox(20, 20, 100, 25, "editBox1")
editBox.Text = "editBox1"
page.Annotations.Add(editBox)
' Create button that will show the widget
Dim buttonShow = New PushButton(20, 80, 50, 25, "buttonShow")
buttonShow.Caption = "Show"
page.Annotations.Add(buttonShow)
' Add Show action
Dim showAction = New HideAction(False)
showAction.Fields.Add(editBox)
buttonShow.OnActivated = showAction
' Create button that will hide the widget
Dim buttonHide = New PushButton(100, 80, 50, 25, "buttonHide")
buttonHide.Caption = "Hide"
page.Annotations.Add(buttonHide)
' Add Hide action
Dim hideAction = New HideAction(True)
hideAction.Fields.Add(editBox)
buttonHide.OnActivated = hideAction
' 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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