Check whether Image has source in XAML

Question

I have the following lines of XAML:

<extToolkit:BusyIndicator IsBusy="<image source not set>"> <Image Source="{Binding FirstSideImage, Converter={StaticResource bitmapConverter}}" /> </extToolkit:BusyIndicator>

I would like the BusyIndicator's IsBusy property to depend on the availability of the Image's Source property. So if there is no image source, IsBusy should be true, otherwise false.

Is this somehow possible? I could of course have a separate property in my view model that does the same but I'd like to know if I can derive this directly from the image.

brunnerh · Accepted Answer · 2012-01-31 10:05:14Z

You could apply a style to the BusyIndicator, assuming that the Image is the Content (i am not familiar with the control):

<extToolkit:BusyIndicator> <extToolkit:BusyIndicator.Style> <Style TargetType="extToolkit:BusyIndicator"> <Setter Property="IsBusy" Value="False" /> <Style.Triggers> <DataTrigger Binding="{Binding Content.Source, RelativeSource={RelativeSource Self}}" Value="{x:Null}"> <Setter Property="IsBusy" Value="True" /> </DataTrigger> </Style.Triggers> </Style> </extToolkit:BusyIndicator.Style> <Image Source="{Binding FirstSideImage, Converter={StaticResource bitmapConverter}}" /> </extToolkit:BusyIndicator>

You could also directly use the binding in the trigger and apply a converter which turns null into true.

Collectives™ on Stack Overflow

Check whether Image has source in XAML

1 Answer 1

Comments

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Related