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WinForms app crashing with OpcBrowseControl

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12 Jul 2019 10:29 #7520 by support
Thank you.
Best regards

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12 Jul 2019 08:12 #7519 by SZL
Hello,

Unbelievable, but it works in 32 bit mode too. Love Mirosoft! :)

Thanks for help!

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12 Jul 2019 06:48 #7517 by support
Hello,
please try following workaround:

openFileDialog1.ShowHelp = true;

- from stackoverflow.com/questions/6718148/windows-forms-gui-hangs-...ling-openfiledialog-showdialog .

Best regards

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10 Jul 2019 12:46 #7514 by SZL
Hello,

You are welcome! Outside of VS I have the same problem, in this case the app CPU usage are on limit.

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10 Jul 2019 12:33 - 10 Jul 2019 12:33 #7513 by support
Hello,
thank you for details.

Have you tried to run your app outside of the debugger? I found it weird that in your picture, the process that has 98% CPU is the Visual Studio process, and not your app itself.

Regards
Last edit: 10 Jul 2019 12:33 by support.

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10 Jul 2019 12:01 #7512 by SZL
Hello,

Visual Studio version: 2019, but not depend on version, I try it with 2017 and 2015 too.
In design time there are not problem, at runtime just after I create new OpenFileDialog object.

Update:
If I switch my project to 64 mode, there are no problem (I will test it more time).

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10 Jul 2019 11:52 #7511 by support
Hello,

we will try to reproduce it and I will let you know then here.

Additional question2:
1. Which version of Visual Studio are you using?
2. When precisely does this happen? When you run the application and then invoke the file dialog, or also just when designing in Visual Studio?

Note: We do not officially support older versions like 5.50. I will still try to help, but our options are limited.

Best regards

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10 Jul 2019 08:33 #7508 by SZL
Hello,

I have big problem with the OpcBrowserControl control. After I place it on my form and I execute my app and after I try open an OpenFileDialog control, the CPU usage increasing to 100% and my app (and Visual Studio) freezing. When I remove the OpcBrowserControl and restart Visual Studio, the OpenFileDialog control working fine.

My code to open a Windows file browser:


The CPU usage if the form contains the OpcBrowserControl:



My QuickOPC version: 5.50.405.1

Please help me fix this problem, this is an urgent project.

Thank you!

BR, László
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