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Watermark text justification https://forum.pdfsharp.net/viewtopic.php?f=2&t=4163 |
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Author: | JRDumont [ Sun Aug 02, 2020 3:18 pm ] |
Post subject: | Watermark text justification |
I am placing a Watermark on PDF files after they are generated. I would like the user to have the ability to locate the Watermark on the PDF. For example, Top Left, Top Right, Center etc. Is it possible to change the justification of the Watermark? Currently, it's defaulting to Top Left. Based on the location of the Watermark I would like to change the justification of the Watermark accordingly. Here's my code: Sub PDFWatermark(ByRef PDFName As String, ByRef PDFProject As String, PDFQty As String) Dim Watermark As String Watermark = "Project: " + descAssyProject.Value + " - Project Qty: " + activeCompQty Dim emSize As Integer = 50 Dim font = New XFont("Times New Roman", emSize, XFontStyle.BoldItalic) Dim document = PdfReader.Open(PDFName) If document.Version < 14 Then document.Version = 14 For idx = 0 To document.Pages.Count - 1 Dim page = document.Pages(idx) Dim pHeight As Double = page.Height pHeight = pHeight - (emSize * 1.5) Dim pWidth As Double = page.Width pWidth = pWidth / 2 Using gfx = XGraphics.FromPdfPage(page, XGraphicsPdfPageOptions.Prepend) Dim size = gfx.MeasureString(Watermark, font) Dim format = New XStringFormat() format.Alignment = XStringAlignment.Near format.LineAlignment = XLineAlignment.Near Dim brush As XBrush = New XSolidBrush(XColor.FromArgb(128, 255, 0, 0)) gfx.DrawString(Watermark, font, brush, New XPoint(50, pHeight), format) End Using Next document.Save(PDFName) End Sub |
Author: | TH-Soft [ Mon Aug 03, 2020 8:37 am ] |
Post subject: | Re: Watermark text justification |
Hi! JRDumont wrote: Is it possible to change the justification of the Watermark? You can invoke DrawString with a destination rectangle instead of a destination point. Then the various alignments make sense and you just have to change the flags of your "format" variable.
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