Same..

Shared... there you go... now for extra bonus points, what does the Shared
attribute do under the hood... mmmm...mmmmmmmmmm


---
Regards,
Scott Barnes
http://www.riagenic.com


On Mon, Dec 12, 2011 at 1:43 PM, Stephen Price <[email protected]>wrote:

> 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****
>>>
>>> ****
>>>
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>>>
>>
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