[IronPython] Silverlight DataBinding Not Working
Lukas Cenovsky
cenovsky at bakalari.cz
Thu Dec 31 10:37:03 CET 2009
I overlooked you are doing ElementBinding.
It seems it does not work in IronPython - the Slider (element you are
binding to) probably does not fire PropertyChanged event. I would blame
some magic with codebehind files :-)
In this case, the slider is updated when the text box changes its value:
<Slider x:Name="sliderFontSize" Margin="3" Minimum="1" Maximum="40"
Value="8" />
<TextBox x:Name="textboxFontSize" Text="{Binding
ElementName=sliderFontSize, Path=Value, Mode=TwoWay}"/>
In this case, the text box is updated when the slider changes its value:
<Slider x:Name="sliderFontSize" Margin="3" Minimum="1" Maximum="40"
Value="{Binding ElementName=textboxFontSize, Path=Text, Mode=TwoWay}" />
<TextBox x:Name="textboxFontSize" Text="5"/>
Finally this works but it not much usable:
<Slider x:Name="sliderFontSize" Margin="3" Minimum="1" Maximum="40"
Value="{Binding ElementName=textboxFontSize, Path=Text, Mode=TwoWay}" />
<TextBox x:Name="textboxFontSize" Text="{Binding
ElementName=sliderFontSize, Path=Value, Mode=TwoWay}"/>
--
-- Lukáš
Shyam Gopale wrote:
> But, I am just doing binding between elements. Is this still required.
> If you see my XAML I am just binding the value of a slider to the
> fontsize of a textblock. I am not sure if the Ironpython code hits
> that path.
>
> Thanks,
> Shyam
>
> On Wed, Dec 30, 2009 at 10:02 PM, Lukas Cenovsky <cenovsky at bakalari.cz
> <mailto:cenovsky at bakalari.cz>> wrote:
>
> Shyam Gopale wrote:
>
> Hi,
> I am trying out some sample Silverlight code with IronPython
> and I found that the data binding does not work properly.
> The app.xaml is as below:
> <UserControl x:Class="System.Windows.Controls.UserControl"
> xmlns="http://schemas.microsoft.com/client/2007"
> xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
> <Grid x:Name="layout_root" Background="White">
> <StackPanel>
> <Slider x:Name="sliderFontSize" Margin="3" Minimum="1"
> Maximum="40" Value="10" />
> <TextBlock x:Name="lblMessage" Text="Hello World" Margin="5"
> FontSize="{Binding ElementName=sliderFontSize,
> Path=Value,Mode=TwoWay}"></TextBlock>
> <Button x:Name="cmdClickMe" Content="Click Me!"
> Margin="5"></Button>
> </StackPanel>
> </Grid>
> </UserControl>
> This XAML when used in a C# Silverlight app reflects the
> correct data binding behaviour but does not work when used
> with IronPython and Chiron. Mainly the font size of the text
> block is not updated.
> Does anyone have any idea about this?
>
> Check my blog about binding in Silverlight:
> http://gui-at.blogspot.com/2009/11/inotifypropertychanged-and-databinding.html
>
> --
> -- Lukáš
>
>
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