How to absolute position the image in existing pdf using itextsharp - vb.net

Question

Here is the code I have so far:
Imports iTextSharp.text
Imports iTextSharp.text.pdf
Imports System.IO
Module Module1
Sub Main()
AddjImage("C:\test.png", "c:\pdfTemplate.pdf", "C:\output.pdf")
End Sub
Private Function AddjImage(ByVal strImageFileName As String, ByVal pdfTemplateFile As String, ByVal outputPdf As String) As Boolean
Try
Dim iPdfReader As PdfReader = New PdfReader(pdfTemplateFile)
Dim iPdfStamper As PdfStamper = New PdfStamper(iPdfReader, New FileStream(outputPdf, FileMode.Create))
Dim imgjImage As iTextSharp.text.Image
Dim bytContent As PdfContentByte
'Insert Image
imgjImage = iTextSharp.text.Image.GetInstance(strImageFileName)
imgjImage.Alignment = iTextSharp.text.Image.ALIGN_TOP
imgjImage.ScalePercent(78)
imgjImage.SetAbsolutePosition(445, 0)
bytContent = iPdfStamper.GetOverContent(1)
bytContent.AddImage(imgjImage)
iPdfStamper.FormFlattening = True
iPdfStamper.Close()
Return True
Catch ex As Exception
Return False
End Try
End Function
End Module
The pdf is in landscape layout. The page size is A4. I am trying to insert the image on right side of the pdf page. I want to align the image on x=445 and y=0 position.
I have couple of images with two sizes. They are:
image 1 with width=500px; height=910px;
image 2 with width=500px; height=400px;
The problem is, both the images are aligned to bottom instead of top. because of that the top portion of image 1 is cut off.

Answer 1

I tried your code(with modifications) to suit my button click event in a wpf app. The line below has to be altered to make the image go up. I feel the 0 you are using starts from bottom.
imgjImage.SetAbsolutePosition(445, 0)
to be altered to
imgjImage.SetAbsolutePosition(445, 200)
the 200 is not absolute, it has to be readjusted for your image actual size.