how to insert table for existing form fill pdf using itextsharp - itext

Question

I have a form fill pdf where we dynamically add text field values to pdf. after adding this i need to add the table in the same page of the pdf.
if i add table it creates new pdf with only table. all other existing data are cleared.
I am using below code :
private void AddTableToPDF()
{
Document doc = new Document(iTextSharp.text.PageSize.LETTER, 10, 10, 100, 100);
try
{
string pdfFilePath = #"D:\Temp\PDF\Inspection Form - Steel Girder.pdf";
PdfWriter wri = PdfWriter.GetInstance(doc, new FileStream(pdfFilePath, FileMode.Append));
doc.Open();//Open Document to write
System.IO.MemoryStream mStream = new System.IO.MemoryStream();
PdfWriter writer = PdfWriter.GetInstance(doc, mStream);
DataTable dt = GetDataTable();
DataTable dtHeader = new DataTable();
dtHeader = GetHeaderDataTable();
if (dtHeader != null)
{
PdfPTable PdfTable = new PdfPTable(dtHeader.Columns.Count);
PdfPCell PdfPCell = null;
for (int rows = 0; rows < dtHeader.Rows.Count; rows++)
{
for (int column = 0; column < dtHeader.Columns.Count; column++)
{
PdfPCell = new PdfPCell(new Phrase(new Chunk(dtHeader.Rows[rows][column].ToString(), font8)));
PdfTable.AddCell(PdfPCell);
}
}
doc.Add(PdfTable); // add pdf table to the document
}
if (dt != null)
{
PdfPTable PdfTable = new PdfPTable(dt.Columns.Count);
PdfPCell PdfPCell = null;
PdfPCell = new PdfPCell(new Phrase(new Chunk("Reference", font8)));
PdfTable.AddCell(PdfPCell);
PdfPCell = new PdfPCell(new Phrase(new Chunk("Remark", font8)));
PdfTable.AddCell(PdfPCell);
PdfPCell = new PdfPCell(new Phrase(new Chunk("Description", font8)));
PdfTable.AddCell(PdfPCell);
for (int rows = 0; rows < dt.Rows.Count; rows++)
{
for (int column = 0; column < dt.Columns.Count; column++)
{
PdfPCell = new PdfPCell(new Phrase(new Chunk(dt.Rows[rows][column].ToString(), font8)));
PdfTable.AddCell(PdfPCell);
}
}
doc.Add(PdfTable); // add pdf table to the document
}
}
catch (DocumentException docEx)
{
Response.Write(docEx.Message);
}
catch (IOException ioEx)
{
Response.Write(ioEx.Message);
}
catch (Exception ex)
{
Response.Write(ex.Message);
}
finally
{
doc.Close();
}
}

Answer 1

Suppose your main PDF is named with m1.pdf. you just create a new PDF with name m2.pdf which will contain the new Table that you need to add. now just merge these Two PDF (m1.pdf & m2.pdf) in to new one 'MergedNerw.pdf')
To Merge Two PDF please use following code this Works fine i have Tested it:
protected void BtnMerge_Click(object sender, EventArgs e)
{
String[] files = #"d:\m1.pdf,d:\m2.pdf".Split(',');
MergeFiles(#"d:\MergedNew.pdf", files);
}
public void MergeFiles(string destinationFile, string[] sourceFiles)
{
if (System.IO.File.Exists(destinationFile))
System.IO.File.Delete(destinationFile);
string[] sSrcFile;
sSrcFile = new string[2];
string[] arr = new string[2];
for (int i = 0; i <= sourceFiles.Length - 1; i++)
{
if (sourceFiles[i] != null)
{
if (sourceFiles[i].Trim() != "")
arr[i] = sourceFiles[i].ToString();
}
}
if (arr != null)
{
sSrcFile = new string[2];
for (int ic = 0; ic <= arr.Length - 1; ic++)
{
sSrcFile[ic] = arr[ic].ToString();
}
}
try
{
int f = 0;
PdfReader reader = new PdfReader(sSrcFile[f]);
int n = reader.NumberOfPages;
//Response.Write("There are " + n + " pages in the original file.");
Document document = new Document(PageSize.A4);
PdfWriter writer = PdfWriter.GetInstance(document, new FileStream(destinationFile, FileMode.Create));
document.Open();
PdfContentByte cb = writer.DirectContent;
PdfImportedPage page;
int rotation;
while (f < sSrcFile.Length)
{
int i = 0;
while (i < n)
{
i++;
document.SetPageSize(PageSize.A4);
document.NewPage();
page = writer.GetImportedPage(reader, i);
rotation = reader.GetPageRotation(i);
if (rotation == 90 || rotation == 270)
{
cb.AddTemplate(page, 0, -1f, 1f, 0, 0, reader.GetPageSizeWithRotation(i).Height);
}
else
{
cb.AddTemplate(page, 1f, 0, 0, 1f, 0, 0);
}
//Response.Write("\n Processed page " + i);
}
f++;
if (f < sSrcFile.Length)
{
reader = new iTextSharp.text.pdf.PdfReader(sSrcFile[f]);
//get the numnber of pages
n = reader.NumberOfPages;
//Response.Write("There are " + n + " pages in the original file.");
}
}
//Response.Write("Success");
document.Close();
}
catch (Exception e)
{
//Response.Write(e.Message);
}
}
Hope this helps you!