Question

On my application i have 3 stackpanels that their visibility is binding to 3 radio button – in case radio button A is checked => stackpanel A1 is visible …

I want to define some variable that will be call CurrentStackPanelInFocus that will be bind to the stackpanel that is visible.

I dont know how to do it.
I know how to write the convert – but i dont know how to do the binding.

Thanks for any help.

( the code is silverlight )

Answer 1

If I am reading your question correctly… Create a visibility converter, based on the standard one you see hundreds of times, then make the following changes:

• Use an enum for 3 state value (e.g. enum StackPanelType{ Panel1, Panel2, Panel3})
• Bind each panel to that same variable (e.g. {Binding Path=CurrentStackPanelInFocus...})
• In each binding specify a converter parameter, named after the enum value you want to match
  e.g {Binding Path=CurrentStackPanelInFocus, Convertor="{StaticResource PanelConverter}" ConverterParameter="Panel1"}
• In the converter check that the value object passed is of the type of your enum
• Convert the value to an enum and then check the string version matches the parameter
• Return Visible if the param matches the enum, else return Collapsed