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WPF Printing

Posted: Fri Dec 03, 2010 2:09 am
by Richard_Gould
Hi Alex,

I am currently evaluating your imaging software for my WPF application.

Everything is looking really good so far and I must compliment you on an excellent product.

In order to use your VintaSoft.Imaging.dll in WPF I had to create a Windows Form Control and run it from there.

I can perform all of the basic functions correctly (next/back, zoom in/out, rotate) except that when I tried to print when I received the following error;

Vintasoft.Imaging.Codecs.DecoderException: Image is locked and cannot be reloaded.
at Vintasoft.Imaging.VintasoftImage.Reload(Boolean imageChanged)
at Vintasoft.Imaging.VintasoftImage.set_RenderingSettings(RenderingSettings value)
at Vintasoft.Imaging.ImageCollection.SetRenderingSettings(RenderingSettings renderingSettings)
at WinFrmCntrl_Viewer_V2.WinFrmCntrl_Viewer1.imagePrintDocument1_BeginPrint(Object sender, PrintEventArgs e)
at System.Drawing.Printing.PrintDocument.OnBeginPrint(PrintEventArgs e)
at Vintasoft.Imaging.Print.ImagePrintDocument.OnBeginPrint(PrintEventArgs e)
at System.Drawing.Printing.PrintDocument._OnBeginPrint(PrintEventArgs e)
at System.Drawing.Printing.PrintController.Print(PrintDocument document)
at System.Drawing.Printing.PrintDocument.Print()
at WinFrmCntrl_Viewer_V2.WinFrmCntrl_Viewer1.printToolStripMenuItem_Click(Object sender, EventArgs e)
at WinFrmCntrl_Viewer_V2.WinFrmCntrl_Viewer1.PrintToolStripButton_Click(Object sender, EventArgs e)
at System.Windows.Forms.ToolStripItem.RaiseEvent(Object key, EventArgs e)
at System.Windows.Forms.ToolStripButton.OnClick(EventArgs e)
at System.Windows.Forms.ToolStripItem.HandleClick(EventArgs e)
at System.Windows.Forms.ToolStripItem.HandleMouseUp(MouseEventArgs e)
at System.Windows.Forms.ToolStripItem.FireEventInteractive(EventArgs e, ToolStripItemEventType met)
at System.Windows.Forms.ToolStripItem.FireEvent(EventArgs e, ToolStripItemEventType met)
at System.Windows.Forms.ToolStrip.OnMouseUp(MouseEventArgs mea)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
at System.Windows.Forms.ToolStrip.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.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

Can you please let me know what settings I should use to enable the Print function to work?

Thank you.

Re: WPF Printing

Posted: Fri Dec 03, 2010 4:46 pm
by Alex
Hello Richard,

We have fixed some bugs in version Please download the latest evaluation version of VintaSoftImaging.NET SDK from our we site and evaluate it - I think you will not have any problems.

Best regards, Alexander

Re: WPF Printing

Posted: Sat Dec 04, 2010 8:04 pm
by Richard_Gould
Hi Alex,

I downloaded and installed the latest build as you suggested.

After some further testing I narrowed down the problem to just the rotate functionality.

Apparently when an image is rotated it is locked and cannot be printed.

I first tried to automatically reload the image prior to printing but I can't seem to get it right since I end up with a zero count in the image viewer.

In the meantime I have put in a workaround to just disable the print button if an image is rotated but I would like to find a way to either unlock the image(s) for printing or be able to automatically reload them for printing.


Re: WPF Printing

Posted: Mon Dec 06, 2010 2:13 pm
by Alex
Hi Richard,

We cannot reproduce the problem. Could you send us a project that demonstrates the problem?

As I have understood you:
  • loaded image
  • rotated image
  • printed image - on this step you had exception
Am I right?

Best regards, Alexander

Re: WPF Printing

Posted: Mon Dec 06, 2010 6:35 pm
by Richard_Gould
Hi Alex,

I have sent a link to your email address that enable you to download the source code.

I have also pinned the problem down a little further to only rotated images in multi page PDF's.


Re: WPF Printing

Posted: Tue Dec 07, 2010 10:14 am
by Alex
Hello Richard,

I received your email but I cannot see the link...

Best regards, Alexander