iTextsharp, PdfPCell.VerticalAlignment and PdfPCell.HorizontalAlignment

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再見小時候
再見小時候 2021-02-05 04:15

Im trying to figure out how to get my text inside a PdfPCell to show in the middle. I have tried many different options, like:

myCell.VerticalAlignment = Element.ALIG         


        
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  •  逝去的感伤
    2021-02-05 04:51

    I think the basic problem you're having is that you're adding text to iTextSharp Paragraph objects and then attempting to set this text's alignment using the PdfPCell object that contains it. I'm not sure if the PdfPCell.VerticalAlignment property is only for a PdfPCell's text, or if aligning the Paragraph object inside the PdfPCell doesn't have any affect you can see in your test.

    You're also setting myCell.HorizontalAlignment and myCell.VerticalAlignment to the index value in your for loop. I think you meant to use 1 instread of i.

    Anyway, setting a PdfPCell's HorizontalAlignment and VerticalAlignment properties do work though. Below is a small method that demonstrates this. I wrote it very loosely based on what you were trying to do; if it's close enough to what you're trying to do perhaps you can use this as a starting point in your project.

    private void TestTableCreation() {
        using (FileStream fs = new FileStream("TableTest.pdf", FileMode.Create)) {
            Document doc = new Document(PageSize.A4);
            PdfWriter.GetInstance(doc, fs);
            doc.Open();
    
            PdfPTable table = new PdfPTable(4);
    
            for (int i = -100; i < 100; i++) {
                PdfPCell cell = new PdfPCell(new Phrase(String.Format("Alignment: {0}", i)));
                // Give our rows some height so we can see test vertical alignment.
                cell.FixedHeight = 30.0f;
    
                // ** Try it **
                //cell.HorizontalAlignment = Element.ALIGN_LEFT;
                //cell.HorizontalAlignment = Element.ALIGN_CENTER;
                cell.HorizontalAlignment = Element.ALIGN_RIGHT;
    
                cell.VerticalAlignment = Element.ALIGN_TOP;
                //cell.VerticalAlignment = Element.ALIGN_MIDDLE;
                //cell.VerticalAlignment = Element.ALIGN_BOTTOM;
    
                table.AddCell(cell);
            }
    
            doc.Add(table);
            doc.Close();
        }
    }
    

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