How to use BooleanToVisibilityConverter with visible as default value?

Question

This code work well, but the button visibility is collapsed in the design.

how can i set this to visible?

<!--Resources-->
<BooleanToVisibilityConverter x:Key="BoolToVis" />


<Button Visibility="{Binding Converter={StaticResource BoolToVis}, Source={x:Static local:ConfigUser.Prc}}"  Grid.Row="1"/>

Here is an answer in another question: http://stackoverflow.com/a/9877463/4049478 — nkoniishvt, Jul 15 '15 at 12:47
This is because the default value of Bool is false.may be you can set the initial value to true if that doesnt affect any of your logic — Joseph, Jul 15 '15 at 12:49
Thanks, @nkoniishvt but when i use (cm:DesignerProperties.IsInDesignMode) the visibility don't change on run. — Deyvson Santos, Jul 15 '15 at 13:59
Joseph i tried to set true as initial value but no success. MikeEason i tried to use the FallbackValue=true but don't worked in design mode :( — Deyvson Santos, Jul 15 '15 at 14:07

nkoniishvt · Accepted Answer · 2015-07-16T06:18:00.067

If I get right what you want. What you need is the button to appear in design mode and also appear when your boolean is set to true at runtime.

You can create your converter that test if it's in design mode in addition of your boolean:

using System;
using System.ComponentModel;
using System.Globalization;
using System.Windows;
using System.Windows.Data;
public class DesignVisibilityConverter : IValueConverter {
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture) {
        if (value is bool) {
            return ((bool) value) || DesignerProperties.GetIsInDesignMode(Application.Current.MainWindow)
                ? Visibility.Visible
                : Visibility.Collapsed;
        }
        return Visibility.Collapsed;
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) {
        throw new NotImplementedException();
    }
}

`DesignerProperties.GetIsInDesignMode(Application.Current.MainWindow)` can fail when you are not using a main window. Replace that with `DesignerProperties.GetIsInDesignMode(new DependencyObject())` and it works like a charm. Nonetheless, I like your implementation a lot. — Christian Ivicevic, Jan 29 '17 at 00:15

score 1 · Answer 2 · edited Jun 02 '17 at 13:31

This one defaults to visible. Here is my Inverse BoolToVis

[ValueConversion(typeof(bool), typeof(Visibility))]
public class InverseBooleanToVisibilityConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        return (value != null && (bool)value) ? 
            Visibility.Collapsed : Visibility.Visible;
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        return (value != null) && ((Visibility)value == Visibility.Collapsed);
    }
}

How to use BooleanToVisibilityConverter with visible as default value?

2 Answers2