Universal Windows Platform (UWP)
A Microsoft platform for building and publishing apps for Windows desktop devices.
2,824 questions
Windows Application Packaging Project create new instance everytime open a toast notification
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nguyen tam
1
Reputation point
Windows Application Packaging Project create new instance everytime I open a toast notification. That's not what I want. The second time the app open (from toast notification), this exception fires
System.InvalidOperationException: 'Cannot set Visibility or call Show, ShowDialog, or WindowInteropHelper.EnsureHandle after a Window has closed.'
How to allow only one instance?
{count} votes
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Roy Li - MSFT 32,091 Reputation points Microsoft Vendor2021-09-20T02:36:32.413+00:00 Could you please share the code about how you handle the activation from the notification? Have you made check whether a window already exists before you open a new window?
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