Load PDF from Memory ASP.Net

Question

I am using ITextSharp to generate pdf on the fly and then saving it to disk and display it using Frame.

The Frame has an attribute called src where I pass the generated file name.

This all is working fine what I want to achieve is passing the generated pdf file to Frame without saving it to disk.

HtmlToPdfBuilder builder = new HtmlToPdfBuilder(PageSize.LETTER);
HtmlPdfPage first = builder.AddPage();

//import an entire sheet
builder.ImportStylesheet(Request.PhysicalApplicationPath + "CSS\\Stylesheet.css");
string coupon = CreateCoupon();
first.AppendHtml(coupon);

byte[] file = builder.RenderPdf();
File.WriteAllBytes(Request.PhysicalApplicationPath+"final.pdf", file);
printable.Attributes["src"] = "final.pdf";

Answer 1

I've done exactly what you're trying to do. You'll want to create a handler (.ashx). After you've created your PDF load it in your handler using the code below:

[WebService(Namespace = "http://tempuri.org/")] 
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)] 
public class MapHandler : IHttpHandler, IReadOnlySessionState 
{ 

    public void ProcessRequest(HttpContext context) { 
        CreateImage(context); 
    } 

    private void CreateImage(HttpContext context) { 

        string documentFullname = // Get full name of the PDF you want to display... 

        if (File.Exists(documentFullname)) { 

            byte[] buffer; 

            using (FileStream fileStream = new FileStream(documentFullname, FileMode.Open, FileAccess.Read, FileShare.Read)) 
            using (BinaryReader reader = new BinaryReader(fileStream)) { 
                buffer = reader.ReadBytes((int)reader.BaseStream.Length); 
            } 

            context.Response.ContentType = "application/pdf"; 
            context.Response.AddHeader("Content-Length", buffer.Length.ToString()); 
            context.Response.BinaryWrite(buffer); 
            context.Response.End(); 

        } else { 
            context.Response.Write("Unable to find the document you requested."); 
        } 
    } 

    public bool IsReusable { 
        get { 
            return false; 
        } 
    }