DataContext not set for child views at design time.
See original GitHub issueI’m starting to investigate various design-time problems. I found https://github.com/Caliburn-Micro/Caliburn.Micro/commit/4d2aaf7e2b9a2334ef792a1f6d9f1790c9a02a7a prevents the DataContext from being set.
Sample Wpf project setup: ShellView.xaml (with )
xmlns:cal="clr-namespace:Caliburn.Micro;assembly=Caliburn.Micro.Platform"
cal:Bind.AtDesignTime="True"
d:DataContext="{d:DesignInstance Type=local:ShellViewModel,IsDesignTimeCreatable=True}"
<StackPanel Background="White">
<TextBlock x:Name="Text"></TextBlock>
<ContentControl x:Name="Child"></ContentControl>
</StackPanel>
ChildView.xaml
<TextBlock x:Name="Text"></TextBlock>
and the following simple view models:
public class ShellViewModel : PropertyChangedBase
{
public string Text { get; set; } = "Shell Text";
public ChildViewModel Child { get; set; } = new ChildViewModel();
}
public class ChildViewModel : PropertyChangedBase
{
public string Text { get; set; } = "Child Text";
}
The designer for ShellView.xaml incorrectly shows
whereas it should match the runtime behavior:
I think the simplest fix is to change the fix from @brendankowitz to
if (e.NewValue == e.OldValue || (Execute.InDesignMode && e.NewValue is string)) {
return;
}
Issue Analytics
- State:
- Created 7 years ago
- Reactions:1
- Comments:7 (2 by maintainers)
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Sorry guys, have been living out of a suit case without internet for the last few weeks.
Will take a closer look into this.
Just pushed that change (thanks @brendankowitz). Hoping to have
3.0.2
out in a few days. Apologies for the delays.