DisposeViewerResources displays "Object reference not set to an instance of an object." dialog

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Last Updated: 15 Aug 2022 15:41 by ADMIN

Aleksandar

Created on: 09 Aug 2022 01:53

Type: Bug Report

DisposeViewerResources displays "Object reference not set to an instance of an object." dialog

I display the WPF Report Viewer control in a closable tab. To free the resources I invoke DisposeViewerResources on tab close as described here: https://docs.telerik.com/reporting/embedding-reports/display-reports-in-applications/wpf-application/disposing-the-report-viewer-resources

However, I see the following dialog every time. There is no way to capture this error or suppress the dialog.

2 comments

ADMIN

Dimitar

Posted on: 15 Aug 2022 15:41

Hi Aleksandar,

Thank you for the update with the workaround!

We will have that in mind while investigating whether the behavior in the described scenario should be changed.

Regards,
Dimitar
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Aleksandar

Posted on: 09 Aug 2022 12:40

I was able to solve this by calling DisposeViewerResources() from within ReportViewer.Dispatcher.BeginInvoke(). The UI thread is most likely being accessed from within DisposeViewerResources().