Creating PDF Streaming (no saving file to disk)

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   Hi,

Does anyone have a VB or C# example of how I can send a pdf directly to the response stream?

All the examples I see save the pdf to disk using code such as:

Dim pdf As New QuickPDF.Client

pdf.Connect(ConnectURL, ConnectPort)

pdf.UnlockKey(QuickPDFKey)

pdf.SetOrigin(origin)

pdf.DrawText(100, 100, "Testing 123")

pdf.SaveToFile("../pdf/HelloWorld.pdf")

I'd like to just return the dynamically created pdf when a user opens a certain URL. Is this possible?

Thanks,

Dan

Edit: What I want to do is very similar to what they do with itextsharp here: http://alandennis.blogspot.com/2005/07/streaming-pdf-using-itextsharp-and.html, just with quick pdf.

Edited by Dan - 21 Oct 11 at 3:00PM

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Dan Members Profile Find Members Posts Team Player Joined: 21 Oct 11 Location: US Status: Offline Points: 23	Post Options Post Reply Quote Dan Report Post Thanks(0) Quote Reply Topic: Creating PDF Streaming (no saving file to disk) Posted: 21 Oct 11 at 2:43PM
	Hi, Does anyone have a VB or C# example of how I can send a pdf directly to the response stream? All the examples I see save the pdf to disk using code such as: Dim pdf As New QuickPDF.Client pdf.Connect(ConnectURL, ConnectPort) pdf.UnlockKey(QuickPDFKey) pdf.SetOrigin(origin) pdf.DrawText(100, 100, "Testing 123") pdf.SaveToFile("../pdf/HelloWorld.pdf") I'd like to just return the dynamically created pdf when a user opens a certain URL. Is this possible? Thanks, Dan Edit: What I want to do is very similar to what they do with itextsharp here: http://alandennis.blogspot.com/2005/07/streaming-pdf-using-itextsharp-and.html, just with quick pdf. Edited by Dan - 21 Oct 11 at 3:00PM

samb Members Profile Find Members Posts Beginner Joined: 09 Feb 11 Status: Offline Points: 8	Post Options Post Reply Quote samb Report Post Thanks(0) Quote Reply Posted: 21 Oct 11 at 6:18PM
	Assuming you're using the .net dll wrapper C# would be: byte[] pdfContents = ~~pdf.SaveToStream()~~ pdf.SaveToString() http://www.quickpdflibrary.com/help/quickpdf/SaveToString.php In the .net wrapper, SaveToString requires no arguments and actually returns a byte array, not a string. Edited by samb - 24 Oct 11 at 6:51PM

Dan Members Profile Find Members Posts Team Player Joined: 21 Oct 11 Location: US Status: Offline Points: 23	Post Options Post Reply Quote Dan Report Post Thanks(0) Quote Reply Posted: 21 Oct 11 at 9:58PM
	According to the docs, http://www.quickpdflibrary.com/help/quickpdf/SaveToStream.php SaveToStream() is only available in the Delphi version of quick pdf. I will try the SaveToString() method. Thanks, Dan

Dan Members Profile Find Members Posts Team Player Joined: 21 Oct 11 Location: US Status: Offline Points: 23	Post Options Post Reply Quote Dan Report Post Thanks(0) Quote Reply Posted: 24 Oct 11 at 4:23PM
	Works Here is the rest of the code (VB.Net): Dim filename As String = "Testing.pdf" Dim bytes As Byte() = pdf.SaveToString() Dim m As System.IO.MemoryStream = New System.IO.MemoryStream(bytes, 0, bytes.Length, False, True) Response.Clear() Response.ContentType = "application/pdf" Response.AddHeader("Content-Disposition", "attachment; filename=" & filename) Response.OutputStream.Write(m.GetBuffer(), 0, m.GetBuffer.Length) Response.OutputStream.Flush() Response.OutputStream.Close() Response.End()

Dan Members Profile Find Members Posts Team Player Joined: 21 Oct 11 Location: US Status: Offline Points: 23	Post Options Post Reply Quote Dan Report Post Thanks(0) Quote Reply Posted: 24 Oct 11 at 4:56PM
	Not sure if it's best to leave out the MemoryStream and just use the byte array, but this also works: Dim pdf As New QuickPDF.Client pdf.Connect(ConnectURL, ConnectPort) pdf.UnlockKey(QuickPDFKey) pdf.SetOrigin(origin) pdf.DrawText(100, 100, "Testing 123") Dim filename As String = "Testing.pdf" Dim bytes As Byte() = pdf.SaveToString() Response.Clear() Response.ContentType = "application/pdf" Response.AddHeader("Content-Disposition", "attachment; filename=" & filename) Response.OutputStream.Write(bytes, 0, bytes.Length) Response.OutputStream.Flush() Response.OutputStream.Close() Response.End()

samb Members Profile Find Members Posts Beginner Joined: 09 Feb 11 Status: Offline Points: 8	Post Options Post Reply Quote samb Report Post Thanks(0) Quote Reply Posted: 24 Oct 11 at 7:00PM
	Sorry, you are correct: SaveToString is what I meant to type. As for the Memory Stream, you're usually supposed to dispose them when you're done (either wrap it in a using block, or explicitly call dispose). Otherwise, resources may not be freed up when you think they do. Since your getting a byte array and streaming a byte array, there's no reason to convert it to a memory stream in the middle. Also, since the byte array doesn't need any cleanup, you don't have to worry about resources. Edited by samb - 24 Oct 11 at 7:00PM

Dan Members Profile Find Members Posts Team Player Joined: 21 Oct 11 Location: US Status: Offline Points: 23	Post Options Post Reply Quote Dan Report Post Thanks(0) Quote Reply Posted: 24 Oct 11 at 8:39PM
	Sounds good. Thanks for the help!