C# PDF table add row in wrong position

Question

[EDIT due to misunderstanding of the answer]

I'm doing a simple program in C# with PDF file creation with iText7. In this PDF i'm adding a table whose first cell starts at a certain position in the file.

I don't know if I set the position correctly, but everytime I add another cell with tab.StartNewRow() the resulting new table is repositioned taking THAT last cell as position reference, putting the previously added cells from that point up, while I want to add the cells from that point down.

Which method should I use? That's my code: Previously I set the position of the first table cell using tab1.SetFixedPosition(20, heigh, width);

and then, in order to add the other cells:

if (mylistbox.Items.Count > 0)
  {
     tab1.AddCell("FIRST CELL");
     tab1.StartNewRow();
     for (int i = 0; i < mylistbox.Items.Count; i++)
        {
          tab1.AddCell(mylistbox.Items[i].ToString());
          tab1.StartNewRow();
        }
        doc.Add(tab1);
  }

[EDIT #2] in order to explain my issue better

I have to put 5 tables, which have to grow from a certain point DOWN, positioned at equal distances, same height and width in the doc. This image explains how it should result:

That's indeed what SetFixedPosition does, it's documented as The coordinates specified correspond to the bottom-left corner of the element and it grows upwards. — mkl
so.... do you know a method which takes as reference the top of the table and makes it grow downwards? — AleMaffe
false, it doesn't work. It puts the next table under the previous one because it calculates the position relative to the previous item — AleMaffe
Have you considered creating a Canvas on the page in question with left, top, and right margins as you want them, and the bottom far enough down to allow any expected table size, and then adding the table without SetFixedPosition to that Canvas? — mkl
You mean creating a different canvas for every single table and then adding it to the doc with different positions? So, for example, if I have 5 tables, I have to use 5 canvas? — AleMaffe

Mayfair Mayfair · Accepted Answer · 2021-01-25T15:54:57

In a WPF application, I have a ListBox with 5 items, numbered 1 through 5. This should be very similar to WinForms.

The CreatePercentArray takes a size which is equal to the amount of columns in a row.

An interesting article about tables: link

  private void CreateListBoxTable(Document pdfDoc)
        {
            // Create an array where each item has an equal width, and use the entire pdf width
            // The CreatePercentArray takes a size which is equal to the amount of columns in a row
            // By using percentages, they will automatically adapt
            // Use CreatePointArray for exacter measurements
            var table = new Table(UnitValue.CreatePercentArray(2)).UseAllAvailableWidth();

            if (!MyListBox.Items.IsEmpty)
            {
                foreach (var listBoxItem in MyListBox.Items)
                {
                    table.AddCell(((ListBoxItem) listBoxItem).Content.ToString());
                }
            }
            // Adds table to document
            pdfDoc.Add(table);
            // Closes document
            pdfDoc.Close();
        }

C# PDF table add row in wrong position

1 Answers