Reduce paragraph line height on iTextSharp

Question

How to reduce the line break height that occurs when the paragraph length is too long for the column width of the ColumnText?

I tried the following, as I saw other questions that answered the following:

p.Leading = 0 

But this did not affect.

I also tried increasing Leading to 100 to see if a large line break was added, but didn't work.

SpacingBefore / SpacingAfter does not help:

 p.SpacingBefore = 0 p.SpacingAfter = 0 

How can I reduce this?

Answer 1

When using a table, you need to set a leading position in the cell itself. However, you will see that the Leading property is read-only, so instead you will need to use the SetLeading() method, which takes two values, the first is a fixed start, and the second is multiplied.

EDIT

Sorry, I saw the Column, and my brainless coffee went to the tables.

With a ColumnText you should be able to use the starting paragraph values ​​just fine.

 Dim cb = writer.DirectContent Dim ct As New ColumnText(cb) ct.SetSimpleColumn(0, 0, 200, 200) Dim P1 As New Paragraph("It was the best of times, it was the worst of times") ''//Disable fixed leading P1.Leading = 0 ''//Set a font-relative leading P1.MultipliedLeading = 0.8 ct.AddElement(P1) ct.Go() 

On my machine with iTextSharp 5.1.2.0, this creates two lines of text that are slightly flattened.

Answer 2

Well, it looks like you stumbled upon the difference between text mode and composite mode:

• text mode => call ColumnText.AddText() using the built-in Chunk and Phrase objects.
• composite mode => call ColumnText.AddText() using container objects such as paragraph, image, etc.

When you are in text mode, you add a space between paragraphs by setting the ColumnText property.

When you are in difficult mode, you add space between the objects of the "container", as usual, for example, as if you were not using ColumnText .

Here is an example showing the difference between the two modes:

 int status = 0; string paragraph ="iText ® is a library that allows you to create and manipulate PDF documents. It enables developers looking to enhance web- and other applications with dynamic PDF document generation and/or manipulation."; using (Document document = new Document()) { PdfWriter writer = PdfWriter.GetInstance(document, STREAM); document.Open(); ColumnText ct = new ColumnText(writer.DirectContent); ct.SetSimpleColumn(36, 36, 400, 792); /* * "composite mode"; use AddElement() with "container" objects * like Paragraph, Image, etc */ for (int i = 0; i < 4; ++i) { Paragraph p = new Paragraph(paragraph); // space between paragraphs p.SpacingAfter = 0; ct.AddElement(p); status = ct.Go(); } /* * "text mode"; use AddText() with the "inline" Chunk and Phrase objects */ document.NewPage(); status = 0; ct = new ColumnText(writer.DirectContent); for (int i = 0; i < 4; ++i) { ct.AddText(new Phrase(paragraph)); // Chunk and Phrase are "inline"; explicitly add newline/break ct.AddText(Chunk.NEWLINE); } // set space between "paragraphs" on the ColumnText object! ct.ExtraParagraphSpace = 6; while (ColumnText.HasMoreText(status)) { ct.SetSimpleColumn(36, 36, 400, 792); status = ct.Go(); } } 

So, now that you have updated your code and use composite mode with AddElement() , p.SpacingAfter = 0 WILL , remove the spacing between paragraphs. Or install it the way you want, instead of Paragraph.Leading .