将单选按钮组绑定到 WPF 中的属性
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binding radiobuttons group to a property in WPF
提问by Bogdan Verbenets
Let's imagine that I have:
让我们想象一下，我有：
<RadioButton GroupName="Group1" IsChecked="{Binding Path=RadioButton1IsChecked}" />
<RadioButton GroupName="Group1" IsChecked="{Binding Path=RadioButton2IsChecked}" />
And then in my data source class I have:
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;
}
}
Can I somehow bind my radio buttons directly to SelectedRadioButtonproperty? I really need RadioButton1IsCheckedand RadioButton2IsCheckedproperties only to calculate the selected radiobutton.
我可以以某种方式将我的单选按钮直接绑定到SelectedRadioButton属性吗？我真的只需要RadioButton1IsChecked和RadioButton2IsChecked属性来计算选定的单选按钮。
采纳答案by Bogdan Verbenets
<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);
}
}
回答by Usman Zafar
Declare an enumeration similar to:
声明一个类似于以下内容的枚举：
enum RadioOptions {Option1, Option2}
XAML:
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}}"/>
Converter class:
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;
}
}
回答by user1336827
XAML:
XAML：
<RadioButton IsChecked="{Binding Path=SelectedOption, UpdateSourceTrigger=PropertyChanged}">Option1</RadioButton>
<RadioButton IsChecked="{Binding Path=SelectedOption, UpdateSourceTrigger=PropertyChanged, Converter={v:NotBoolenConverter}}">Option2</RadioButton>
Converter:
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;
}
}
Works with 2 radio buttons, by binding one to the opposite of the other.
使用 2 个单选按钮，通过将一个按钮绑定到另一个。
