I knew that! No, just kidding. News to me too. ;)
Awesome! On Mon, Dec 12, 2011 at 1:35 PM, Patrick Klug <[email protected]> wrote: > I did not know this. Excellent info. Thanks Matt! > > cheers, > Patrick > > > On Mon, Dec 12, 2011 at 11:52 AM, Matt Hamilton <[email protected]>wrote: > >> Steve, >> >> Set your style to be non-shared so it has its own instance across both >> expanders: >> >> <Style x:Key="ExpanderStyle" x:Shared="False" TargetType="Expander"> >> >> HTH, >> Matt >> >> *From:* Steven Nagy <[email protected]> >> *Sent:* Monday, December 12, 2011 12:21 PM >> *To:* [email protected] >> *Subject:* Expander Header via style throws error >> >> >> Hiyas,**** >> >> **** >> >> Really simple to recreate this issue, just paste in this code to a new >> WPF project:**** >> >> **** >> >> <Grid> **** >> >> <Grid.RowDefinitions>**** >> >> <RowDefinition Height="*" />**** >> >> <RowDefinition Height="*" />**** >> >> </Grid.RowDefinitions>**** >> >> <Grid.Resources>**** >> >> <Style x:Key="ExpanderStyle" TargetType="Expander">**** >> >> <Setter Property="Header">**** >> >> <Setter.Value>**** >> >> <Grid>**** >> >> <TextBlock Text="Foo" />**** >> >> </Grid>**** >> >> </Setter.Value>**** >> >> </Setter>**** >> >> </Style>**** >> >> </Grid.Resources>**** >> >> **** >> >> <Expander Style="{StaticResource ExpanderStyle}" />**** >> >> <Expander Style="{StaticResource ExpanderStyle}" Grid.Row="1" />* >> *** >> >> </Grid>**** >> >> **** >> >> Essentially, 2 expanders using the same style to set the header.**** >> >> **** >> >> Throws this exception: *“'Set property >> 'System.Windows.FrameworkElement.Style' threw an exception.' Line number >> '23' and line position '10'”* >> Inner exception: *“Specified element is already the logical child of >> another element. Disconnect it first.”***** >> >> **** >> >> However if you sacrifice the complex header content for something simple >> like this, it works fine:**** >> >> <Setter Property="Header" Value="Foo" />**** >> >> **** >> >> Any ideas why this is the case?**** >> >> Using style inheritance from the same base style causes same issue.**** >> >> However if I blanket copy paste the style with a new name and point the >> expander to that, then it also works fine. So it’s not the header content >> that’s the problem specifically.**** >> >> I’m guessing some sort of virtualisation similar to what the tab control >> does with tab pages under binding scenarios; it is using the same actual >> Grid control and applying it to both headers, thus the inner exception >> above. No idea how to fix it though (other than copying pasting styles >> which I really don’t want to do).**** >> >> **** >> >> Cheers,**** >> >> Steve**** >> >> **** >> >> ------------------------------ >> _______________________________________________ >> ozwpf mailing list >> [email protected] >> http://prdlxvm0001.codify.net/mailman/listinfo/ozwpf >> >> >> _______________________________________________ >> ozwpf mailing list >> [email protected] >> http://prdlxvm0001.codify.net/mailman/listinfo/ozwpf >> >> > > _______________________________________________ > ozwpf mailing list > [email protected] > http://prdlxvm0001.codify.net/mailman/listinfo/ozwpf > >
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