PDFsharp & MigraDoc Foundation

PDFsharp - A .NET library for processing PDF & MigraDoc Foundation - Creating documents on the fly
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PostPosted: Sat Jul 20, 2019 11:27 am 

Joined: Fri May 03, 2019 10:10 pm
Posts: 21
When the PDF file has been created and is still open in Adobe Reader an exception error occurs.
Here is the stack Trace:
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.
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?

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PostPosted: Sun Jul 21, 2019 10:57 pm 
PDFsharp Expert
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Joined: Sat Mar 14, 2015 10:15 am
Posts: 660
Location: CCAA
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

Best regards
(Freelance Software Developer with several years of MigraDoc/PDFsharp experience)

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PostPosted: Fri Jul 26, 2019 7:37 pm 

Joined: Fri May 03, 2019 10:10 pm
Posts: 21
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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