FlowDocumentReader throws System.InvalidOperationException

Question

I've a window that opens on a button click:

previewWindow = new UsrCntrls.PreviewWindow();
previewWindow.DataContext = this;
previewWindow.Show();

and has these on xaml:

<Window x:Class="Client.UsrCntrls.PreviewWindow"
    ...>   
  <Grid>
      <Grid.RowDefinitions>
          <RowDefinition Height="Auto"/>
          <RowDefinition Height="*"/>
      </Grid.RowDefinitions>
      <Button Content="Print" Command="{Binding Print}"/>
      <!--<FlowDocumentReader Document="{Binding Doc}" Grid.Row="1"/>-->
      <FlowDocumentPageViewer Document="{Binding Doc}" Grid.Row="1"/>
  </Grid>
</Window>

With FlowDocumentPageViewer in Grid.Row=1 I can open and close this window as many time as I want without any problem. If I use FlowDocumentReader instead of FlowDocumentPageViewer I can open and close it only once without problem. When I click on the button second time to reopen it, I get this error:

System.InvalidOperationException: 'Specified element is already the logical child of another element. Disconnect it first.'

How to solve this pproblem?

Answer 1

The solution is:

<FlowDocumentReader Document="{Binding Doc, Mode=OneTime}" Grid.Row="1"/>