Export Gridview to PDF using C#.Net for Both AutoGenerate Column and Template Columns

public void ExportToPDF(string ReportName, GridView grdPDF, bool isLandscape,string Filename)
{
int noOfColumns = 0, noOfRows = 0;
DataTable tbl = null;
if (grdPDF.AutoGenerateColumns)
{
tbl = grdPDF.DataSource as DataTable; // Gets the DataSource of the GridView Control.
noOfColumns = tbl.Columns.Count;
noOfRows = tbl.Rows.Count;
}
else
{
noOfColumns = grdPDF.Columns.Count;
noOfRows = grdPDF.Rows.Count;
}
float HeaderTextSize = 8;
float ReportNameSize = 10;
float ReportTextSize = 8;
float ApplicationNameSize = 7;

// Creates a PDF document
Document document = null;
if (isLandscape == true)
{
// Sets the document to A4 size and rotates it so that the orientation of the page is Landscape.
document = new Document(PageSize.A4.Rotate(), 0, 0, 15, 5);
}
else
{
document = new Document(PageSize.A4, 0, 0, 15, 5);
}

PdfPTable mainTable = new iTextSharp.text.pdf.PdfPTable(noOfColumns);
// Sets the first 4 rows of the table as the header rows which will be repeated in all the pages.
mainTable.HeaderRows = 4;

// Creates a PdfPTable with 2 columns to hold the header in the exported PDF.
PdfPTable headerTable = new iTextSharp.text.pdf.PdfPTable(2);
iTextSharp.text.Image imgLogo = iTextSharp.text.Image.GetInstance(HttpContext.Current.Server.MapPath("../Images/medtech_logo.jpg"));
imgLogo.ScaleToFit(100, 25);

PdfPCell clApplicationName = new PdfPCell(imgLogo);
clApplicationName.Border = PdfPCell.NO_BORDER;
clApplicationName.HorizontalAlignment = Element.ALIGN_LEFT;

// Creates a phrase to show the current date at the right hand side of the header.
Phrase phDate = new Phrase(DateTime.Now.Date.ToString("dd-MMM-yyyy"), FontFactory.GetFont("Arial", ApplicationNameSize, iTextSharp.text.Font.NORMAL));
// Creates a PdfPCell which accepts the date phrase as a parameter.
PdfPCell clDate = new PdfPCell(phDate);
// Sets the Horizontal Alignment of the PdfPCell to right.
clDate.HorizontalAlignment = Element.ALIGN_RIGHT;
// Sets the border of the cell to zero.
clDate.Border = PdfPCell.NO_BORDER;

headerTable.AddCell(clApplicationName);
headerTable.AddCell(clDate);
headerTable.DefaultCell.Border = PdfPCell.NO_BORDER;

// Creates a PdfPCell that accepts the headerTable as a parameter and then adds that cell to the main PdfPTable.
PdfPCell cellHeader = new PdfPCell(headerTable);
cellHeader.Border = PdfPCell.NO_BORDER;
// Sets the column span of the header cell to noOfColumns.
cellHeader.Colspan = noOfColumns;
// Adds the above header cell to the table.
mainTable.AddCell(cellHeader);

// Creates a phrase which holds the file name.
Phrase phHeader = new Phrase(sApplicationnName, FontFactory.GetFont("Arial", ReportNameSize, iTextSharp.text.Font.BOLD));
PdfPCell clHeader = new PdfPCell(phHeader);
clHeader.Colspan = noOfColumns;
clHeader.Border = PdfPCell.NO_BORDER;
clHeader.HorizontalAlignment = Element.ALIGN_CENTER;
mainTable.AddCell(clHeader);

// Creates a phrase for a new line.
Phrase phSpace = new Phrase("\n");
PdfPCell clSpace = new PdfPCell(phSpace);
clSpace.Border = PdfPCell.NO_BORDER;
clSpace.Colspan = noOfColumns;
mainTable.AddCell(clSpace);

// Sets the gridview column names as table headers.
for (int i = 0; i < noOfColumns; i++)
{
Phrase ph = null;
if (grdPDF.AutoGenerateColumns)
ph = new Phrase(tbl.Columns[i].ColumnName, FontFactory.GetFont("Arial", HeaderTextSize, iTextSharp.text.Font.BOLD));
else
ph = new Phrase(grdPDF.Columns[i].HeaderText, FontFactory.GetFont("Arial", HeaderTextSize, iTextSharp.text.Font.BOLD));
mainTable.AddCell(ph);
}

// Reads the gridview rows and adds them to the mainTable
for (int rowNo = 0; rowNo < noOfRows; rowNo++)
{
for (int columnNo = 0; columnNo < noOfColumns; columnNo++)
{
if (grdPDF.AutoGenerateColumns)
{
string s = grdPDF.Rows[rowNo].Cells[columnNo].Text.Trim();
Phrase ph = new Phrase(s, FontFactory.GetFont("Arial", ReportTextSize, iTextSharp.text.Font.NORMAL));
mainTable.AddCell(ph);
}
else
{
string s = "";
if (grdPDF.Columns[columnNo] is TemplateField)
{
DataBoundLiteralControl lc = grdPDF.Rows[rowNo].Cells[columnNo].Controls[0] as DataBoundLiteralControl;
if (lc != null)
{
s = lc.Text.Trim();
}
else
{
for (int i = 0; i < grdPDF.Rows[rowNo].Cells[columnNo].Controls.Count; i++)
{
if (grdPDF.Rows[rowNo].Cells[columnNo].Controls[i].GetType() == typeof(TextBox))
{
s = (grdPDF.Rows[rowNo].Cells[columnNo].Controls[i] as TextBox).Text;
}
else if (grdPDF.Rows[rowNo].Cells[columnNo].Controls[i].GetType() == typeof(Label))
{
s = (grdPDF.Rows[rowNo].Cells[columnNo].Controls[i] as Label).Text;
}
else if (grdPDF.Rows[rowNo].Cells[columnNo].Controls[i].GetType() == typeof(System.Web.UI.WebControls.Image))
{
s = (grdPDF.Rows[rowNo].Cells[columnNo].Controls[i] as System.Web.UI.WebControls.Image).ToolTip;
}
}
}
Phrase ph = new Phrase(s, FontFactory.GetFont("Arial", ReportTextSize, iTextSharp.text.Font.NORMAL));
mainTable.AddCell(ph);
}
else
{
s = grdPDF.Rows[rowNo].Cells[columnNo].Text.Trim();
Phrase ph = new Phrase(s, FontFactory.GetFont("Arial", ReportTextSize, iTextSharp.text.Font.NORMAL));
mainTable.AddCell(ph);
}
}
}
mainTable.CompleteRow();
}

PdfWriter.GetInstance(document, HttpContext.Current.Response.OutputStream);
HeaderFooter pdfFooter = new HeaderFooter(new Phrase(), true);
pdfFooter.Alignment = Element.ALIGN_CENTER;
pdfFooter.Border = iTextSharp.text.Rectangle.NO_BORDER;
document.Footer = pdfFooter;
document.Open();
document.Add(mainTable);
document.Close();

HttpContext.Current.Response.ContentType = "application/pdf";
HttpContext.Current.Response.AddHeader("content-disposition", "attachment; filename= "+ Filename +"_"+ DateTime.Now.ToString("dd_MMM_yyyy") +".pdf");
HttpContext.Current.Response.End();
}


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