strange focus rectangles on wpf radiobutton

Question

Why does the rectangle appear in the radio buttons when one of them is clicked.

the XAML markup is given below

<RadioButton GroupName="LabelDisp" IsChecked=".. Converter={StaticResource enumBooleanConverter}, ConverterParameter= LabOnly}" Content="{x:Static resx:StringRes.RadioButtonLab}" Style="{StaticResource ListOption}" Command="{Binding Path=Command}"></RadioButton>
<RadioButton GroupName="LabelDisp" IsChecked=".. Converter={StaticResource enumBooleanConverter}, ConverterParameter= DescOnly}" Content="{x:Static resx:StringRes.RadioButtonDesc}" Style="{StaticResource ListOption}" Command="{Binding Path=Command}"></RadioButton>
<RadioButton GroupName="LabelDisp" IsChecked=".. Converter={StaticResource enumBooleanConverter}, ConverterParameter= LabAndDescr}" Content="{x:Static resx:StringRes.RadioButtonBoth}" Style="{StaticResource ListOption}" Command="{Binding Path=Command}"></RadioButton>

score 26 · Accepted Answer · answered Oct 16 '12 at 17:03

26

I was returning null should have returned Binding.Donothing instead.

public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
            {
                return (bool)value ? Enum.Parse(targetType, parameter.ToString(), true) : Binding.DoNothing;
            }

answered Oct 16 '12 at 17:03

TrustyCoder

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Boolean.DoNothing...great answer! – aromore Sep 23 '13 at 21:38

score 5 · Answer 2 · answered Aug 15 '12 at 14:41

5

Those are called FocusVisualStyle, you can remove it -

<RadioButton FocusVisualStyle="{x:Null}"/>

Update

Yeah H.B. is right, i thought you was talking about dotted border we got on clicking radioButton. But it seems a validation border, check your converter code, something is breaking in it.

answered Aug 15 '12 at 14:41

Rohit Vats

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+1 While not the answer to this question, everybody should know how to disable FocusVisuals, since they can be difficult to find if you don't know what to look for. – erodewald Aug 15 '12 at 18:53

score 2 · Answer 3 · edited May 23 '17 at 12:08

2

Looks like a validation error to me, possibly because of the spaces at the front of the ConverterParameter. (You might want to consider using another method for binding RadioButtons)

edited May 23 '17 at 12:08

Community

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answered Aug 15 '12 at 14:43

H.B.

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@TrustyCoder: So? It's still a validation error, no matter where it comes from (it should be the converter throwing an exception in this case) – H.B. Aug 15 '12 at 15:17
@TrustyCoder, @H.B. was talking about the space in this block: `ConverterParameter= LabOnly`. This is passing in a string like this: `" LabOnly"`, which might be marking it as invalid for whatever reason. – erodewald Aug 15 '12 at 18:52
no that is not the reason i guess. when i removed the converter expression its fine. so i am assuming something is wrong with the enum to boolean converter. – TrustyCoder Aug 15 '12 at 20:23
@TrustyCoder: Huh? That's what i just said. Also the converter could possibly be fine but if you pass in a string with a space it might throw an exception. Also as i said: Don't use a converter in the first place, see the link in my answer. – H.B. Aug 15 '12 at 20:57
I have two enum and two group radio. But one validation error and one success while everything same ( WTF ) – Trương Quốc Khánh Feb 21 '22 at 03:45

strange focus rectangles on wpf radiobutton

3 Answers3