CODEWITHSUNDEEP
c#itextitext7
Davy-F
Davy-F

Reputation: 143

iText 7 - Center align text and paragraphs

I'm trying to center align a block of text, however getting inconsistent results. Here is a rough idea of my code:

baseCanvas.ShowTextAligned("Header 1", 555, 839, TextAlignment.CENTER, 0);
baseCanvas.ShowTextAligned("Test test test ...", 240, 809, TextAlignment.CENTER, 0);

Here is the PDF Output:

Output

However I'm trying to achieve the following: Design

I've checked the iText documentation, but is there a way to do this without having to create tables and cells?

Upvotes: 1

Views: 16875

Answers (3)

diegoolipa
diegoolipa

Reputation: 1

    Div div2 = new Div();
    div2.setPaddingLeft(35);
    div2.setPaddingRight(35);
    div2.setPaddingBottom(5);
    div2.add(new Paragraph().add(new Paragraph("Hola Mundo")
                    .setFontSize(12)
                    .setTextAlignment(TextAlignment.JUSTIFIED)
                    .setPaddingLeft(10)
            )
            .setPaddingBottom(4));
    document.add(div2);

Upvotes: 0

Red_Phoenix
Red_Phoenix

Reputation: 507

I do it like this. Where the document is created, get the width of the document.

var document = new Document(pdfDoc);
var pageSize = pdfDoc.GetDefaultPageSize();
var width = pageSize.GetWidth() - document.GetLeftMargin() - document.GetRightMargin();

Then create the paragraph with this function.

private Paragraph CenteredParagraph(Text text, float width)
{
    var tabStops = new List<TabStop> { new TabStop(width / 2, TabAlignment.CENTER) };
    var output = new Paragraph().AddTabStops(tabStops);
    output.Add(new Tab())
            .Add(text);
    return output;
}

After that just add the paragraph to the document.

document.Add(CenteredParagraph("All the text to add that is centered.");

Upvotes: 0

Bruno Lowagie
Bruno Lowagie

Reputation: 77528

When you do:

baseCanvas.ShowTextAligned("Some text", x, y, TextAlignment.CENTER, 0);

Then you want the coordinate (x, y) to coincide with the middle of the text "some text".

In your code snippet, you are centering some text around the coordinate (555, 839) and some text around the coordinate (40, 809) which explains the difference.

Since you are using iText 7, why don't you take advantage of the fact that you can now easily position Paragraph objects at absolute positions? The iText 7 jump-start tutorial for .NET already introduces some of the basic building blocks, but the Building blocks tutorial goes into more depth.

Take a look at the first example of chapter 2 and adapt it like this:

PdfPage page = pdf.AddNewPage();
PdfCanvas pdfCanvas = new PdfCanvas(page);
Rectangle rectangle = new Rectangle(36, 650, 100, 100);
Canvas canvas = new Canvas(pdfCanvas, pdf, rectangle);
PdfFont font = PdfFontFactory.createFont(FontConstants.TIMES_ROMAN);
PdfFont bold = PdfFontFactory.createFont(FontConstants.TIMES_BOLD);
Text title =
    new Text("The Strange Case of Dr. Jekyll and Mr. Hyde").SetFont(bold);
Text author = new Text("Robert Louis Stevenson").SetFont(font);
Paragraph p = new Paragraph().Add(title).Add(" by ").Add(author);
p.SetTextAlignment(iText.Layout.Properties.TextAlignment.CENTER);
canvas.Add(p);
canvas.Close();

This should add the text inside the rectangle (36, 650, 100, 100) and center all content.

Upvotes: 7

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