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Cannot access the file because being used by another process
http://forum.pdfsharp.de/viewtopic.php?f=2&t=3996
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Author:  Rocky48 [ Sat Jul 20, 2019 11:27 am ]
Post subject:  Cannot access the file because being used by another process

When the PDF file has been created and is still open in Adobe Reader an exception error occurs.
Here is the stack Trace:
Quote:
System.IO.IOException
HResult=0x80070020
Message=The process cannot access the file 'D:\Visual Basic Projects\My Greeting\My Greeting\bin\Debug\Verse.pdf' because it is being used by another process.
Source=mscorlib
StackTrace:
at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy, Boolean useLongPath, Boolean checkHost)
at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access)
at PdfSharp.Pdf.PdfDocument.Save(String path)
at My_Greeting.frmPrintFrm.printIt(DataRow row) in D:\Visual Basic Projects\My Greeting\My Greeting\frmPrintFrm.vb:line 156
at My_Greeting.frmPrintFrm.btnPrint_Click(Object sender, EventArgs e) in D:\Visual Basic Projects\My Greeting\My Greeting\frmPrintFrm.vb:line 97
at System.Windows.Forms.Control.OnClick(EventArgs e)
at System.Windows.Forms.Button.OnClick(EventArgs e)
at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ButtonBase.WndProc(Message& m)
at System.Windows.Forms.Button.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnRun()
at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.DoApplicationModel()
at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.Run(String[] commandLine)
at My_Greeting.My.MyApplication.Main(String[] Args) in :line 81

Karen @ MDSN suggested adding line: document = Nothing
But this did not solve it.
Had an idea of creating a For Next loop to add a number to the filename, but iterated all the range before leaving the form.
Can you advise a method to cure this problem?

Author:  TH-Soft [ Sun Jul 21, 2019 10:57 pm ]
Post subject:  Re: Cannot access the file because being used by another pro

Rocky48 wrote:
Can you advise a method to cure this problem?
Not a problem, everything working as intended.

To improve the usability, you can add a GUID to the filename like some PDFsharp/MigraDoc samples do.
http://www.pdfsharp.net/wiki/MixMigraDo ... ample.ashx

Author:  Rocky48 [ Fri Jul 26, 2019 7:37 pm ]
Post subject:  Re: Cannot access the file because being used by another pro

I fixed it very simply by creating a random number between 1 and 100000 and concatinating this into the filename.
Problem solved!

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