Change Content Template on Button Click Wpf - wpf

Question

I have the following XAML:
<Window
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="WpfApplication4" Height="300" Width="300">
<Window.Resources>
<ControlTemplate x:Key="simpleErrorTemplate">
<TextBox Margin="10,10,10,5" TextWrapping="Wrap" VerticalScrollBarVisibility="Auto" Text="T1" />
</ControlTemplate>
<ControlTemplate x:Key="detailedErrorTemplate">
<StackPanel>
<TextBox Margin="10,10,10,5" TextWrapping="Wrap" VerticalScrollBarVisibility="Auto" Text="T2" />
<TextBox Margin="10,10,10,5" TextWrapping="Wrap" VerticalScrollBarVisibility="Auto" Text="T3" />
<TextBox Margin="10,10,10,5" TextWrapping="Wrap" VerticalScrollBarVisibility="Auto" Text="T4" />
</StackPanel>
</ControlTemplate>
</Window.Resources>
<Grid>
<ContentControl>
<ContentControl.Style>
<Style TargetType="ContentControl">
<Setter Property="Template"
Value="{StaticResource simpleErrorTemplate}"/>
<Style.Triggers>
<DataTrigger Binding="{Binding ElementName=Button,Path=IsPressed}" Value="True">
<Setter Property="Template" Value="{StaticResource detailedErrorTemplate}"/>
</DataTrigger>
</Style.Triggers>
</Style>
</ContentControl.Style>
</ContentControl>
<Button x:Name="Button" Content="Button" Height="40" Width="129" Margin="88,5,76,5" Grid.Row="1" Click="Button_Click1"/>
</Grid>
</Window>
I had like to change the GUI style the moment I click the button just like it happends when DataTrigger is set for the Checkbox.
The code Behind looks as follows however the moment I click the button the window closes and no result.
import wpf
from System.Windows import Application, Window
class MyWindow(Window):
def __init__(self):
self.ui = wpf.LoadComponent(self, 'WpfApplication4.xaml')
def Button_Click1(self, sender, e):
self.ContentTemplate = Window.Resources.FindName(self,'detailedErrorTemplate')
if __name__ == '__main__':
Application().Run(MyWindow())
Why the template wont change?
Thank you.

Answer 1

I am unfamiliar with ironpython, but in your click handler it looks like you're setting the ContentTemplate of your window, which seems incorrect. I assume your detailedErrorTemplate is supposed to apply to your ContentControl. In this case you need to add x:Name to your ContentControl (i.e.: x:Name="TheContentControl") in order to reference the ContentControl in your code behind and set (in c#)
TheContentControl.Template = this.Resources["detailedErrorTemplate"] as ControlTemplate;
You have key's for your resources, not Names, so you need to index the resource dictionary by the key.
Edit details based on comments.
In your xaml, change your line
<ContentControl>
to
<ContentControl x:Name="TheContentControl">
Since we now have a name for the ContentControl, you can properly change the ControlTemplate of the ContentControl (NOT the window. I understand that your ContentControl effectively encompasses the Window, but you can't just assign that ControlTemplate meant for the ContentControl to the Window like that). Change your line of code from:
self.ContentTemplate = Window.Resources.FindName(self,'detailedErrorTemplate')
to (I hope I'm doing the syntax correctly).
self.TheContentControl.Template = self.Resources['detailedErrorTemplate']