How to open a file directly from a MemoryStream opposed to writing to disk (pdf file)

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Hi
I am doing code in C#, and i have created pdf using itextsharp,
now i want to open my pdf directly in Acrobat Reader 9 (without giving any path to filestream)and then ask to client , wheather he want to save that pdf file.

C#

MemoryStream ms = new MemoryStream();
PdfWriter writer = PdfWriter.GetInstance(pDoc, ms); 

var file = System.IO.Path.GetTempFileName();
           using (var fileStream = File.OpenWrite(file))
           {
               var buffer = ms.GetBuffer();
               fileStream.Write(buffer, 0, (int)buffer.Length);
           }

I have used above code, but getting error SecurityException was unhandled by user code -- File operation not permitted. Access to path '' is denied

when i have used below code den pdf is getting created , means Admin settings have not any problems.

C#

writer = PdfWriter.GetInstance(doc, new FileStream(filpath, FileMode.Create));

so plz help me , so that i will open direct pdf from memorystream without saving it in a disk.

Posted 11-Oct-11 22:56pm

dev22

Updated 11-Oct-11 23:15pm

Mehdi Gholam

v2

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Sergey Alexandrovich Kryukov · Answer 1 · 2011-10-12T07:27:00

I cannot see where you got this exception. Writing to the file with the name obtained System.IO.Path.GetTempFileName() is perfectly legal. If the file name was empty (how your error message suggests), the error message would be different ("Empty path name is not legal"). So, I suspect your exception report is not 100% accurate. Not to worry — you don't need to do this.

First, please understand that the memory stream is quite useless. Yes, you can read and write to it, but how can you make Acrobat Reader 9 doing it? This application probably has nothing to do with .NET.

So, unfortunately, you're bound to use a temporary file. If your last code sample works, use it, only assign your variable filpath to temporary file name:

C#

string filpath = System.IO.Path.GetTempFileName();
//...

—SA