Vista - Indirect (or two level) Binding

Hi Everyone,

In XAML, I'm trying to retrieve the value of a numerical dependentproperty
(say MyRectangle2.Height ) that is databound to another (say
MyRectangle2.Height so MyRectangle1.Height = MyRectangle2.Height that is
10). I expected to get the value resulting of this binding (10) but I only
get the NaN value.
How to get the value (of the indirection) ?

I precize that I got It working once but I can't anymore, don't ask me
why... : )

Hope I'm clear. If I'm not, have a look on the sample code above. In it we
can see that the two level binding doesn't work either for a string
property.

Thanx in advance.


<Window
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
x:Name="DemoPbNaN" x:Class="PbNan.WinDemoPbNaN" Title="DemoPbNaN"
SizeToContent="WidthAndHeight" >

<StackPanel x:Name="StackPanel" >

<TextBox x:Name="TXB_Test" Text="Test" TextWrapping="Wrap"
AcceptsReturn="True" />

<TextBlock x:Name="TBK_Bound1"
Height="{Binding Height, ElementName=Txtb_Test, Mode=Default}"
Text="{Binding Text, ElementName=Txtb_Test, Mode=Default}"
Background="Blue" />

<TextBlock x:Name="TBK_Bound2a" Background="Red" Margin="2"
Height="{Binding Height, ElementName=Txtb_Test, Mode=Default}"
Text="{Binding Text, ElementName=TextBlock, Mode=Default}"/>

<TextBlock x:Name="TBK_Bound2b" Background="Red" Margin="2"
Text="{Binding Height, ElementName=TextBlock, Mode=Default}" />

</StackPanel>


</Window>

OK, that's not a matter of indirection. It's more general. It's a matter of
hardcoded value or not. If the bound value is not hardcoded (e.g. bound
value or auto value) it doesn't work...


"Patrice Ongla" <patrice.ongla@wanadoo.fr> a écrit dans le message de news:
OapAkehwGHA.2232@TK2MSFTNGP05.phx.gbl...
> Hi Everyone,
>
> In XAML, I'm trying to retrieve the value of a numerical dependentproperty
> (say MyRectangle2.Height ) that is databound to another (say
> MyRectangle2.Height so MyRectangle1.Height = MyRectangle2.Height that is
> 10). I expected to get the value resulting of this binding (10) but I only
> get the NaN value.
> How to get the value (of the indirection) ?
>
> I precize that I got It working once but I can't anymore, don't ask me
> why... : )
>
> Hope I'm clear. If I'm not, have a look on the sample code above. In it we
> can see that the two level binding doesn't work either for a string
> property.
>
> Thanx in advance.
>
>
> <Window
> xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
> xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
> x:Name="DemoPbNaN" x:Class="PbNan.WinDemoPbNaN" Title="DemoPbNaN"
> SizeToContent="WidthAndHeight" >
>
> <StackPanel x:Name="StackPanel" >
>
> <TextBox x:Name="TXB_Test" Text="Test" TextWrapping="Wrap"
> AcceptsReturn="True" />
>
> <TextBlock x:Name="TBK_Bound1"
> Height="{Binding Height, ElementName=Txtb_Test, Mode=Default}"
> Text="{Binding Text, ElementName=Txtb_Test, Mode=Default}"
> Background="Blue" />
>
> <TextBlock x:Name="TBK_Bound2a" Background="Red" Margin="2"
> Height="{Binding Height, ElementName=Txtb_Test, Mode=Default}"
> Text="{Binding Text, ElementName=TextBlock, Mode=Default}"/>
>
> <TextBlock x:Name="TBK_Bound2b" Background="Red" Margin="2"
> Text="{Binding Height, ElementName=TextBlock, Mode=Default}" />
>
> </StackPanel>
>
>
> </Window>
>
>