将单选按钮组绑定到 WPF 中的属性 [英] binding radiobuttons group to a property in WPF
本文介绍了将单选按钮组绑定到 WPF 中的属性的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
假设我有:
<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:
And then in my data source class I have:
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.
Can I somehow bind my radio buttons directly to SelectedRadioButton
property? I really need RadioButton1IsChecked
and RadioButton2IsChecked
properties only to calculate the selected radiobutton.
推荐答案
<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);
}
}
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