Sample RazorHost C# to convert Dnn Page to PDF

_ABBV_Techsheet_PDF_v11.cshtml

@using System;
@using System.Collections.Generic;
@using System.Linq;
@using System.Web;
@using System.Web.UI;
@using System.Web.UI.WebControls;
@using DotNetNuke.Common

@* the following is a DLL added to the /bin folder, see http://selectpdf.com/community-edition/  *@
@using SelectPdf;

@* @inherits DotNetNuke.Web.Razor.DotNetNukeWebPage<dynamic> *@

@{
	string productQS = Request.QueryString["slug"];
	string techsheetQS = Request.QueryString["techsheet"];
	string pdfAction = Request.QueryString["pdf"];

	// IPs that can see the demo/experiments
	// in order; 309SN, client's office, staff1, localhost, and this server's WAN IP
	string[] safeIPs = { "192.241.63.162", "127.0.0.1", "204.9.79.162" };
}


@if (!String.IsNullOrEmpty(techsheetQS) && techsheetQS == "1") 
{
	string url = String.Format("https://abbv.accuraty.co/Shop/Product/{0}/techsheet/1", productQS); 

	@* we don't instantiate and convert/create the PDF unless /pdf/something is in the URL *@
	if (pdfAction == "download" || pdfAction == "view" || pdfAction == "save")
	{
		// from here we started with code from this sample, http://selectpdf.com/html-to-pdf/demo/convert-url-to-pdf.aspx
		// read parameters from the webpage
		string savePath = Server.MapPath("~/Portals/0/PDF/TechSheets/");
		string saveFilename = String.Format("TechSheet_{0}.pdf", productQS);

		// instantiate a html to pdf converter object
		HtmlToPdf converter = new HtmlToPdf();

		// set converter options
		converter.Options.CssMediaType = (HtmlToPdfCssMediaType)Enum.Parse(typeof(HtmlToPdfCssMediaType), "Print", true);
		converter.Options.PdfPageSize = (PdfPageSize)Enum.Parse(typeof(PdfPageSize), "Letter", true);
		converter.Options.PdfPageOrientation = (PdfPageOrientation)Enum.Parse(typeof(PdfPageOrientation), "Portrait", true);
		converter.Options.WebPageWidth = 820;
		converter.Options.WebPageHeight = 0;

		// create a new pdf document converting an url
		PdfDocument doc = converter.ConvertUrl(url);

		// get conversion result (contains document info from the web page)
		HtmlToPdfResult result = converter.ConversionResult;

		// set the document properties
		doc.DocumentInformation.Title = result.WebPageInformation.Title;
		doc.DocumentInformation.Author = "[ client or username ]";
		doc.DocumentInformation.CreationDate = DateTime.Now;

		switch (pdfAction)
		{
			case "download":
				doc.Save(HttpContext.Current.Response, false, saveFilename);
				// thread aborted error, WHY
				break;

			case "view":
				doc.Save(HttpContext.Current.Response, true, saveFilename);
				// thread aborted error, WHY
				break;

			// THIS ONE DOES NOT WORK
			case "save": // save pdf document
				doc.Save(savePath + saveFilename);  // .Save(Response, false, "Sample.pdf");
				break;

			default:
				// do nothing, shouldn't happen
				break;
		}

		// close pdf document
		doc.Close();
	}
	else
	{
		<p class="no-print text-right" style="margin-bottom: 0;">
			<span class="btn btn-primary" onClick="window.print();">Print Page</span>
			<a class="btn btn-primary" href="@String.Format("{0}/pdf/view", url)">View PDF</a>
			<a class="btn btn-primary" href="@String.Format("{0}/pdf/download", url)">Download PDF</a>
			@*<a class="btn btn-primary" href="@String.Format("{0}/pdf/save", url)">save (doesn't work)</a>*@
		</p>

		<style type="text/css">
			.no-print .btn {
				margin: 0 5px 0 0;
				padding: 6px 14px;
				font-size: 16px;
			}
			/* override "visited" color on buttons */
			.btn-primary.active, .btn-primary.focus, .btn-primary:active, .btn-primary:focus, .btn-primary:hover {
				background-color: #960208 !important;
			}
		</style>
	}
}




@functions {
	//private static string ParseTLDFromHost(string fullHost) // expecting Uri.Host to be passed in !!
	//{
	//	string[] splitHost = fullHost.Split('.');
	//	return splitHost[splitHost.Count() - 1];
	//}

	private bool IsAdminOrHost(DotNetNuke.Entities.Users.UserInfo userInfo)
	{
		return userInfo.IsSuperUser || userInfo.IsInRole(DotNetNuke.Entities.Portals.PortalSettings.Current.AdministratorRoleName);
	}

	private static string ValueOut(string name, string value, string tag)
	{
		return String.Format("<{0}>{1} = {2}</{0}>", tag, name, value);
	}

	private static string LinkOut(string tag, string text, string link)
	{
		return String.Format("<{0}><a href=\"{1}\">{2}</a></{0}>", tag, link, text);
	}
}