Read binary file from database but don't save it - sql-server

Question

I wrote a windows form program in VB
In the from of my Project I want if a button is clicked, show a file (pdf or word) that save in database. I use this code for doing it and this code works fine. but files are copied in my bin folder of project. I want that these files only show on screen but not saved anywhere. Can anyone help me?
Try
Using dr As SqlDataReader = cmd.ExecuteReader()
While dr.Read()
Dim size As Integer = 1024 * 1024
Dim buffer As Byte() = New Byte(size - 1) {}
Dim readBytes As Integer = 0
Dim index As Integer = 0
filename = dr("DocName")
Using fs As New FileStream(filename, FileMode.Create, FileAccess.Write, FileShare.None)
While (InlineAssignHelper(readBytes, CInt(dr.GetBytes(0, index, buffer, 0, size)))) > 0
fs.Write(buffer, 0, readBytes)
index += readBytes
End While
End Using
End While
End Using
Catch ex As Exception
Dim errMessageBox As New Puzzle.ErrorHandler
errMessageBox.ShowError("Err", "FrmCustomer:DbTools_GetAttachFile", "line", ex.Message)
Exit Sub
Finally
ConImage.Close()
End Try
End Using
Dim prc As New Process()
prc.StartInfo.FileName = filename
prc.Start()

Answer 1

Just modify the following line, and it should work.
'filename = dr("DocName") ' replace this line
filename = IO.Path.GetTempFileName ' with this
Basically, IO.Path.GetTempFileName will get a temporary filename in the Windows Temp folder. This folder is used for keeping temporary files and is usually cleaned by various disk cleaning tools automatically or when you ask windows to reclaim wasted space (via Disk Cleanup program).
Note that you would need the same filename when opening the file.