How to Start Convert PDF Work with PDF Modules PDF Document PDF Pages Text Image Graph & Path Annotation, Markup & Drawing Redaction Security Digital Signature Forms Watermark Bookmark Link File Attachment File Metadata Printing Work with Other SDKs Barcode read Barcode create OCR Twain

Using VB.NET PDF SDK
VB.NET PDF Library: how to add, remove, update PDF page background using vb.net


VB.NET Demo Code to add, remove, update PDF page background using vb.net











asp.net remove text from pdf online, asp.net pdf editor component, asp.net open excel file on client, asp.net preview pdf, asp net show word document in browser, how to show pdf file in asp.net c#, asp net core mvc pdf viewer free.





VB.NET: apply page background settings to a PDF document object


Dim inputFilePath As String = "C:\1.pdf"
Dim outputFilePath As String = "C:\1_backgd.pdf"

' open a PDF file
Dim doc As PDFDocument = New PDFDocument(inputFilePath)

Dim resBackground As PDFBackgroudRes = New PDFBackgroundFillColorRes(Color.Yellow)

' define a page background setting
Dim background1 As PDFPageBackground = New PDFPageBackground(resBackground)
background1.Opacity = 0.2F

' define page range all odd pages
Dim pageRange1 As PageRangeOptions = New PageRangeOptions()
pageRange1.AllPages = True
pageRange1.Subset = PageRangeSubset.Odd

' apply page background settings to all odd pages
PDFPageFieldHandler.ApplyBackground(doc, background1, pageRange1)

' define a page background setting
Dim background2 As PDFPageBackground = New PDFPageBackground(resBackground)
background2.Opacity = 0.2F

' define page range all even pages
Dim pageRange2 As PageRangeOptions = New PageRangeOptions()
pageRange2.AllPages = True
pageRange2.Subset = PageRangeSubset.Even

' apply page background settings to all even pages
PDFPageFieldHandler.ApplyBackground(doc, background2, pageRange2)

doc.Save(outputFilePath)




VB.NET remove all page background settings in a PDF document object


Dim inputFilePath As String = "C:\1_backgd.pdf"
Dim outputFilePath As String = "C:\output.pdf"

Dim doc As PDFDocument = New PDFDocument(inputFilePath)
PDFPageFieldHandler.RemoveBackgrounds(doc)
doc.Save(outputFilePath)




VB.NET retrieve all page background settings from a PDF file


Dim inputFilePath As String = "C:\1_backgd.pdf"

Dim doc As PDFDocument = New PDFDocument(inputFilePath)

' get all Background settings in the document
Dim info As PDFPageBackgroundInfo = PDFPageFieldHandler.RetreiveBackgrounds(doc)

' get default setting for Background And Page Range
Dim defaultSetting As PDFPageBackground = info.GetDefaultSetting()
Dim defaultPageRange As PageRangeOptions = info.GetDefaultPageRangeSettings()