I want to add a header and footer to my pdf that I am generating from a .NET view. I got the above overriding method from demos on this site but I do not understand
how I can add a header or footer this seems to just add more text to the document body. Also don't get how to save the document after you edit it, the method I used above causes general access errors, is there something that I am missing?

I added the segment of code so that my onResultExecutedMethod is now:
protected override void OnResultExecuted(ResultExecutedContext filterContext)
{
base.OnResultExecuted(filterContext);

EO.Pdf.HtmlToPdfResult result = MVCToPDF.Result;
if (result != null)
{
foreach (var page in result.PdfDocument.Pages)
{
EO.Pdf.HtmlToPdf.Options.OutputArea = new System.Drawing.RectangleF(0, 0.5f, 8.5f, 0.5f);
EO.Pdf.HtmlToPdfResult header = EO.Pdf.HtmlToPdf.ConvertHtml("<div>Overlay text</div>", page);
}
}
string fileName = Server.MapPath("\\") + "snapReport.pdf";
result.PdfDocument.Save(fileName);
}

But it still isn't adding my html text, it displays the same pdf as if I didn't overload the method.

Ok, but what would I do in the afterConvertHandler function? Is that where I would add the header?

Also I cannot seem to padd any variables into MVC.ToPDF.RenderAsPDF, it doesn't compile if I add a parameter to it

CODE:
using EO.Pdf.Mvc;
using EO.Pdf.Mvc5;
using EO.Pdf;

MVCToPDF.ResultAsDownload = false;

EO.Pdf.Mvc.MVCToPDF.RenderAsPDF(Post_Handler);//This does not compile


EO.Pdf.Runtime.AddLicense(mykey);

return View("SnapReportPDF",model);
}

private void Post_Handler(object sender, PdfDocumentEventArgs e)//This does not compile, type of PdfDocumentEventArgs cannot be found
{

}

protected override void OnResultExecuted(ResultExecutedContext filterContext)
{
base.OnResultExecuted(filterContext);

EO.Pdf.HtmlToPdfResult result = MVCToPDF.Result;
if (result != null)
{
foreach (var page in result.PdfDocument.Pages)
{
EO.Pdf.HtmlToPdf.Options.OutputArea = new System.Drawing.RectangleF(0, 0.1f, 8.5f, 9.5f);
EO.Pdf.HtmlToPdfResult header = EO.Pdf.HtmlToPdf.ConvertHtml("<div>Overlay text</div>", page);
}
}
string fileName = Server.MapPath("\\") + "snapReport.pdf";
result.PdfDocument.Save(fileName);
}

In the Post_handler function I want to merge the result pdf page with some other pdf, how do I do that because when I attempt to use PDFDocument.Merge it will not allow me to assign the new merged document to result.PDFDocument.

Code:
private void Post_Handler(object sender, PdfDocumentEventArgs e)
{

EO.Pdf.HtmlToPdfResult result = MVCToPDF.Result;
PdfDocument merged = new PdfDocument();
if (result != null)
{
int i = 0;

WebClient client = new WebClient();

foreach (var url in _drawings)
{

//create a pdf document with url
byte[] bytes = client.DownloadData(url);
MemoryStream ms = new MemoryStream(bytes);
PdfDocument newPDF = new PdfDocument(ms);
//merge and reasign to result.PdfDOcument
merged = PdfDocument.Merge(merged, newPDF);


}

result.PdfDocument = PdfDocument.Merge(result.PdfDocument, merged);//This wont compile because it is readonly

foreach (var page in result.PdfDocument.Pages)
{
i++;
//Add header
EO.Pdf.HtmlToPdf.Options.OutputArea = new System.Drawing.RectangleF(0.5f, 0.25f, 7.5f, 0.5f);
EO.Pdf.HtmlToPdfResult header = EO.Pdf.HtmlToPdf.ConvertHtml("<div>" + _reportName + "</div><div style='float:right'>" + _clientName + "</div><div>" + _locationName + "</div>", page);

//Add footer
EO.Pdf.HtmlToPdf.Options.OutputArea = new System.Drawing.RectangleF(0.5f, 10.25f, 7.5f, 0.5f);
EO.Pdf.HtmlToPdfResult footer = EO.Pdf.HtmlToPdf.ConvertHtml("<table style='width:100%;'><tr><td style='width:34%'></td><td align='center' style='width:33%'>" + i + "</td><td align='right' style='width:33%'>Print Date: " + _date + "</td></tr><tr><td style='width:34%'></td><td style='width:33%'></td><td align='right' style='width:33%'>Building No. " + _locationNumber + "</td></tr></table>", page);
}
}