The BooleanConverter class provides a way to convert a value to a boolean value. The converter returns true when the specified parameter is the string representation of the value. This is useful with data binding to place a checkmark in menus or to check or uncheck a toggle button. The class can be used in XAML as a static resource to automatically convert bound property values. Supported types are: System.Enum, int, int?, bool?, char and char?.
Introduced: 16.0.
[C#]
[ValueConversion(typeof(int), typeof(bool))]
[ValueConversion(typeof(int?), typeof(bool))]
[ValueConversion(typeof(System.Enum), typeof(bool))]
[ValueConversion(typeof(bool?), typeof(bool))]
[ValueConversion(typeof(char), typeof(bool))]
[ValueConversion(typeof(char?), typeof(bool))]
public class BooleanConverter : IValueConverter
[Visual Basic]
Public Class BooleanConverter
Implements IValueConverter
| Method | Description | |
| Convert | Converts a value to a boolean. | |
| ConvertBack | Converts a boolean to a value of the type specified through the targetType parameter. |
The following XAML example shows how to bind radio buttons to the InputFormat.NumberedListFormat property using the BooleanConverter class and the InputFormat.NumberFormats property.
…
xmlns:tx="clr-namespace:TXTextControl.WPF;assembly=TXTextControl.WPF"
…
<Window.Resources>
<tx:BooleanConverter x:Key="boolConv" />
</Window.Resources>
…
<RadioButton
Content="{Binding ElementName=textControl1, Path=InputFormat.NumberFormats[0]}"
GroupName="numberFormat"
IsChecked="{Binding
ElementName=textControl1,
Path=InputFormat.NumberedListFormat,
Converter={StaticResource boolConv},
ConverterParameter=ArabicNumbers}" />
<RadioButton
Content="{Binding ElementName=textControl1, Path=InputFormat.NumberFormats[1]}"
GroupName="numberFormat"
IsChecked="{Binding
ElementName=textControl1,
Path=InputFormat.NumberedListFormat,
Converter={StaticResource boolConv},
ConverterParameter=Letters}" />
…
