Silverlight, path through TemplateBindings of UserControls - silverlight

Question

I have a MainPage.xaml with a TextBox (Binding TextBoxText) and some nested UserControls, which all have a TextBox with a TemplateBinding / Binding too (4 TextBoxes).
I would like have the same text in every box, when I change the text somewhere.
The solution: Link
What could I do to synchronize all texts?
Thanks!
MainPage.xaml (TextBoxText is the one, which I like to display everywhere)
<myContDll:DefaultContainerTemplate Caption="NewCaption">
<StackPanel x:Name="myStackPanel">
<sdk:Label Content="Binding TextBoxText of MainPage"/>
<TextBox Text="{Binding TextBoxText}"/>
<myDll:MyButtonControl x:Name="ButtonControl" Count="44"
Button3Caption="NewButton3"
Button3Visibility="Visible"
DisplayText="Form2Text2"
TextBoxText="{Binding TextBoxText}"/>
</StackPanel>
</myContDll:DefaultContainerTemplate>
Generic.xaml:
<Style TargetType="local:MyButtonControl">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="local:MyButtonControl">
<StackPanel>
<sdk:Label Content="inner control test"/>
<sdk:Label Content="TemplateBinding TextBoxText of MyButtonControl"/>
<TextBox Text="{TemplateBinding TextBoxText}"/>
<Button Content="{TemplateBinding Button3Caption}" Visibility="{TemplateBinding Button3Visibility}" x:Name="Button3"/>
<local:CountDisplayControl x:Name="Control1" TextBoxText="{TemplateBinding TextBoxText}" Visibility="{TemplateBinding VisibilityText1}" Count="{TemplateBinding Count}" DisplayText="{TemplateBinding DisplayText1}"/>
<local:CountDisplayControl2 x:Name="Control2" TextBoxText="{TemplateBinding TextBoxText}" Visibility="{TemplateBinding VisibilityText2}" Count="{TemplateBinding Count}" DisplayText="{TemplateBinding DisplayText2}"/>
<local:CountDisplayUserControl TextBoxText="{TemplateBinding TextBoxText}"/>
</StackPanel>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style TargetType="local:CountDisplayControl">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="local:CountDisplayControl">
<Border Background="{TemplateBinding Background}"
BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="{TemplateBinding BorderThickness}">
<StackPanel>
<sdk:Label Content="Control1"/>
<sdk:Label Content="{TemplateBinding Count}"/>
<sdk:Label x:Name="labelText" Content="{TemplateBinding Text}"/>
<sdk:Label Content="TemplateBinding TextBoxText of CountDisplayControl"/>
<TextBox Text="{TemplateBinding TextBoxText}"/>
</StackPanel>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style TargetType="local:CountDisplayControl2">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="local:CountDisplayControl2">
<Border Background="{TemplateBinding Background}"
BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="{TemplateBinding BorderThickness}">
<StackPanel>
<sdk:Label Content="Control2"/>
<sdk:Label Content="{TemplateBinding Count}"/>
<sdk:Label x:Name="labelText" Content="{TemplateBinding Text}"/>
<sdk:Label Content="TemplateBinding TextBoxText of CountDisplayControl2"/>
<TextBox Text="{TemplateBinding TextBoxText}"/>
</StackPanel>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>

Answer 1

Try setting your Binding Mode to TwoWay binding:
<myContDll:DefaultContainerTemplate Caption="NewCaption">
<StackPanel x:Name="myStackPanel">
<sdk:Label Content="Binding TextBoxText of MainPage"/>
<TextBox Text="{Binding TextBoxText, Mode=TwoWay}"/>
<myDll:MyButtonControl x:Name="ButtonControl" Count="44"
Button3Caption="NewButton3"
Button3Visibility="Visible"
DisplayText="Form2Text2"
TextBoxText="{Binding TextBoxText, Mode=TwoWay}"/>
</StackPanel>
</myContDll:DefaultContainerTemplate>