Problem with Multivalue Combobox in WPF Viewer for Reporting Services (workaround)

The problem:

In WPF Viewer for Reporting Services till version 3.0.1 inclusive there was a problem with Multivalue combobox. Drop down wasn't shown on button click.

The reason:

This happened because of the error in style of Multivalue Combobox.

The workaround:

It is necessary to add the following resources dictionary to the project:.

And add a reference to it in the Viewer resources:

        <perpetuum:ReportViewer Grid.Row="3" x:Name="reportViewer">


                <ResourceDictionary Source="pack://application:,,,/<AssemblyName>;component/ReportingStyles.xaml"/>



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