Hello,
I have a problem with binding in NavBarControl.
Next code is correct and it works
<Window …>
<Grid>
<ContentControl Width="30">
<Line X1="0" Y1="0.5" X2="1" Y2="0.5" Stretch="Fill" Stroke="Black"
StrokeThickness="{Binding ElementName=sliderLineSize, Path=Value}"></Line>
</ContentControl>
<Slider MinWidth="30" Name="sliderLineSize" TickPlacement="TopLeft" Minimum="1" TickFrequency="1" Maximum="25" Margin="5, 0, 5, 0" Value="1"></Slider>
</Grid>
</Window>
Thickness of the line is binding to the value of the slider. But next code doesnt work:
…
<dxn:NavBarControl Width="300" Height="Auto">
<dxn:NavBarControl.Groups>
<dxn:NavBarGroup Header="xxx" GroupStyle="ContainerControl">
<dxn:NavBarGroup.Content>
<Grid>
<ContentControl Width="40">
<Line Name="linePreview" X1="0" Y1="0.5" X2="1" Y2="0.5" Stretch="Fill" Stroke="Black"
StrokeThickness="{Binding ElementName=sliderLineSize, Path=Value}"></Line>
</ContentControl>
<Slider MinWidth="30" Name="sliderLineSize" TickPlacement="TopLeft" Minimum="1"
TickFrequency="1" Maximum="25" Margin="5, 0, 5, 0"
Value="1" ValueChanged="sliderLineSize_ValueChanged"></Slider>
</Grid>
</dxn:NavBarGroup.Content>
</dxn:NavBarGroup>
</dxn:NavBarControl.Groups>
<dxn:NavBarControl.View>
<dxn:NavigationPaneView>
</dxn:NavigationPaneView>
</dxn:NavBarControl.View>
</dxn:NavBarControl>
…
Programm runs as usually, but Line doesnt binds to slider. In output there is next message:
System.Windows.Data Error: 4 : Cannot find source for binding with reference 'ElementName=sliderLineSize'. BindingExpression:Path=Value; DataItem=null; target element is 'Line' (Name='linePreview'); target property is 'StrokeThickness' (type 'Double')
Bug Report
Q143540
Visible to All Users
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Hi Aleksandr,
This seems to be a flaw in our control. Thank you for drawing our attention to it. I've converted your Question to a Bug Report and we'll do our best to resolve it as soon as possible.
Thanks,
Serge
P.S. While testing this issue, we've found another problem. So, I've created a separate Bug Report on your behalf - ContentTemplate isn't applied to a NavBarGroup.
For now, please use the following workaround:
<dxn:NavBarControl> <dxn:NavBarControl.Groups> <dxn:NavBarGroup GroupStyle="ContainerControl"> <dxn:NavBarGroup.Content> <ContentControl> <ContentControl.ContentTemplate> <DataTemplate> <Grid> <ContentControl Width="40"> <Line Name="linePreview" X1="0" Y1="0.5" X2="1" Y2="0.5" Stretch="Fill" Stroke="Black" StrokeThickness="{Binding ElementName=sliderLineSize, Path=Value}"/> </ContentControl> <Slider MinWidth="30" Name="sliderLineSize" TickPlacement="TopLeft" Minimum="1" TickFrequency="1" Maximum="25" Margin="5, 0, 5, 0" Value="1"/> </Grid> </DataTemplate> </ContentControl.ContentTemplate> </ContentControl> </dxn:NavBarGroup.Content> </dxn:NavBarGroup> </dxn:NavBarControl.Groups> <dxn:NavBarControl.View> <dxn:NavigationPaneView/> </dxn:NavBarControl.View> </dxn:NavBarControl>Regards,
Serge
SEE ALSO:
Data Binding - Wrong DataContext of items in a NavBarGroup