如何使用C＃将嵌套表添加到iText中PDF的现有表中

Question

The following code below gives me a table in iText.

However, I would like to also add two further columns to the right of the table; one which shows another '=' sign, (basically exactly the same as the 2nd column of the existing table) and then to the right of that I would like to add another column showing an 'a' (the same as the 1st column of the existing table).

So really I want to take my existing table and add the 2nd and 1st column onto the end of it in that order so I finish with a table with 5 columns. Do I need to produce a nested table for this? Any help would be much appreciated.

PdfPTable table0 = new PdfPTable(3);

float[] widths = new float[] { 7f, 0.5f, 4f };

table0.SetWidths(widths);

PdfPCell cell0 = new PdfPCell(new Phrase("a"));
cell0.Rowspan = 2;
cell0.VerticalAlignment = Element.ALIGN_MIDDLE;
cell0.HorizontalAlignment = 1; //0=Left, 1=Centre, 2=Right            
table0.AddCell(cell0);

cell0 = new PdfPCell(new Phrase(" = "));
cell0.Rowspan = 2;
cell0.VerticalAlignment = Element.ALIGN_MIDDLE;
cell0.HorizontalAlignment = 0; //0=Left, 1=Centre, 2=Right            
table0.AddCell(cell0);

cell0 = new PdfPCell(new Phrase("b"));
cell0.HorizontalAlignment = 1; //0=Left, 1=Centre, 2=Right            
table0.AddCell(cell0);

cell0 = new PdfPCell(new Phrase("c"));
cell0.HorizontalAlignment = 1; //0=Left, 1=Centre, 2=Right            
table0.AddCell(cell0);

document.Add(table0);

Answer 1

To "add the 2nd and 1st column onto the end of" your table, you need to:

• initialize the PdfPTable table0 for two more columns;
• extend the float[] widths to contain widths for two more columns; and
• add the cells for two more columns.

Eg like this:

PdfPTable table0 = new PdfPTable(5);

float[] widths = new float[] { 7f, 0.5f, 4f, 0.5f, 7f };

table0.SetWidths(widths);

PdfPCell cell0 = new PdfPCell(new Phrase("a"));
cell0.Rowspan = 2;
cell0.VerticalAlignment = Element.ALIGN_MIDDLE;
cell0.HorizontalAlignment = 1; //0=Left, 1=Centre, 2=Right            
table0.AddCell(cell0);

cell0 = new PdfPCell(new Phrase(" = "));
cell0.Rowspan = 2;
cell0.VerticalAlignment = Element.ALIGN_MIDDLE;
cell0.HorizontalAlignment = 0; //0=Left, 1=Centre, 2=Right            
table0.AddCell(cell0);

cell0 = new PdfPCell(new Phrase("b"));
cell0.HorizontalAlignment = 1; //0=Left, 1=Centre, 2=Right            
table0.AddCell(cell0);

cell0 = new PdfPCell(new Phrase(" = "));
cell0.Rowspan = 2;
cell0.VerticalAlignment = Element.ALIGN_MIDDLE;
cell0.HorizontalAlignment = 0; //0=Left, 1=Centre, 2=Right            
table0.AddCell(cell0);

cell0 = new PdfPCell(new Phrase("a"));
cell0.Rowspan = 2;
cell0.VerticalAlignment = Element.ALIGN_MIDDLE;
cell0.HorizontalAlignment = 1; //0=Left, 1=Centre, 2=Right            
table0.AddCell(cell0);

cell0 = new PdfPCell(new Phrase("c"));
cell0.HorizontalAlignment = 1; //0=Left, 1=Centre, 2=Right            
table0.AddCell(cell0);

document.Add(table0);