让我们想象一下,我有。
<RadioButton GroupName="Group1" IsChecked="{Binding Path=RadioButton1IsChecked}" />
<RadioButton GroupName="Group1" IsChecked="{Binding Path=RadioButton2IsChecked}" />
然后在我的数据源类中,我有:
public bool RadioButton1IsChecked { get; set; }
public bool RadioButton2IsChecked { get; set; }
public enum RadioButtons { RadioButton1, RadioButton2, None }
public RadioButtons SelectedRadioButton
{
get
{
if (this.RadioButtonIsChecked)
return RadioButtons.RadioButton1;
else if (this.RadioButtonIsChecked)
return RadioButtons.RadioButton2;
else
return RadioButtons.None;
}
}
我能不能把我的单选按钮直接绑定到... SelectedRadioButton
财产?我真的需要 RadioButton1IsChecked
和 RadioButton2IsChecked
属性来计算选定的radiobutton。
声明一个类似于..:
enum RadioOptions {Option1, Option2}
XAML:
<RadioButton IsChecked="{Binding SelectedOption, Converter={StaticResource EnumBooleanConverter}, ConverterParameter={x:Static local:RadioOptions.Option1}}"/>
<RadioButton IsChecked="{Binding SelectedOption, Converter={StaticResource EnumBooleanConverter}, ConverterParameter={x:Static local:RadioOptions.Option2}}"/>
转换器类。
public class EnumBooleanConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
return value.Equals(parameter);
}
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
return ((bool)value) ? parameter : Binding.DoNothing;
}
}
<RadioButton GroupName="Group1" IsChecked="{Binding Path=SelectedRadioButton, Converter={StaticResource EnumBooleanConverter}, ConverterParameter=RadioButton1}" />
<RadioButton GroupName="Group1" IsChecked="{Binding Path=SelectedRadioButton, Converter={StaticResource EnumBooleanConverter}, ConverterParameter=RadioButton2}" />
public enum RadioButtons { RadioButton1, RadioButton2, None }
public RadioButtons SelectedRadioButton {get;set;}
public class EnumBooleanConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
var ParameterString = parameter as string;
if (ParameterString == null)
return DependencyProperty.UnsetValue;
if (Enum.IsDefined(value.GetType(), value) == false)
return DependencyProperty.UnsetValue;
object paramvalue = Enum.Parse(value.GetType(), ParameterString);
return paramvalue.Equals(value);
}
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
var ParameterString = parameter as string;
var valueAsBool = (bool) value;
if (ParameterString == null || !valueAsBool)
{
try
{
return Enum.Parse(targetType, "0");
}
catch (Exception)
{
return DependencyProperty.UnsetValue;
}
}
return Enum.Parse(targetType, ParameterString);
}
}
我们可以动态地创建单选按钮。ListBox
可以帮助我们做到这一点,没有转换器,很简单。
的 好处 步骤如下:如果有一天你的枚举类发生了变化,你不需要更新GUI(XAML文件)。
步骤如下:创建一个ListBox,将ListBox的ItemsSource设置为枚举类,并将ListBox的SelectedItem绑定为Selected属性,然后创建每个ListBoxItem的Radio Buttons。
public enum RadioButtons
{
RadioButton1,
RadioButton2,
None
}
<Window.Resources>
<ObjectDataProvider MethodName="GetValues"
ObjectType="{x:Type system:Enum}"
x:Key="RadioButtons">
<ObjectDataProvider.MethodParameters>
<x:Type TypeName="local:RadioButtons" />
</ObjectDataProvider.MethodParameters>
</ObjectDataProvider>
</Window.Resources>
Control Template
以单选按钮的形式填充里面的每个项目 <ListBox ItemsSource="{Binding Source={StaticResource RadioButtons}}" SelectedItem="{Binding SelectedRadioButton, Mode=TwoWay}" >
<ListBox.Resources>
<Style TargetType="{x:Type ListBoxItem}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate>
<RadioButton
Content="{TemplateBinding ContentPresenter.Content}"
IsChecked="{Binding Path=IsSelected,
RelativeSource={RelativeSource TemplatedParent},
Mode=TwoWay}" />
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</ListBox.Resources>
</ListBox>
现在,享受吧~
参考文献。 https:/brianlagunas.coma-better-way-to data-bind-enums-in-wpf。
XAML:
<RadioButton IsChecked="{Binding Path=SelectedOption, UpdateSourceTrigger=PropertyChanged}">Option1</RadioButton>
<RadioButton IsChecked="{Binding Path=SelectedOption, UpdateSourceTrigger=PropertyChanged, Converter={v:NotBoolenConverter}}">Option2</RadioButton>
转换器。
public class NotBoolenConverter : IValueConverter
{
public NotBoolenConverter()
{
}
public override object Convert(
object value,
Type targetType,
object parameter,
CultureInfo culture)
{
bool output = (bool)value;
return !output;
}
public override object ConvertBack(
object value,
Type targetType,
object parameter,
CultureInfo culture)
{
bool output = (bool)value;
return !output;
}
}
与2个单选按钮一起工作,通过将一个按钮绑定到另一个按钮的反面。